rear differential - honda stream on russia: Новости - rear differential... · rear...

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Rear Differential

Rear Differential................................................................

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Special Tools . 15-2Component Location Index . 15-3General Troubleshooting Information . 15-4DTC Troubleshooting Index . 15-10Symptom Troubleshooting Index . 15-11System Description . 15-12Circuit Diagram . 15-18DTC Troubleshooting . 15-20Symptom Troubleshooting . 15-41Rear Differential Fluid

Inspection and Replacement . 15-47Rear Differential Function Test . 15-48Rear Differential Fluid Temperature Sensor

Replacement . 15-49VTM-4 LOCK Switch Test/Replacement . 15-49VTM-4 Control Unit Replacement . 15-50VTM-4 Relay Replacement . 15-50Rear Differential Breather, Line, and Hose

Replacement . 15-51Rear Differential Mount Replacement . 15-52Rear Differential Removal . 15-53Backlash Inspection . 15-55Rear Differential Installation . 15-56

07/05/09 16:43:09 61SJC020_150_0001

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Ref. No. Tool Number Description Qty

15-2

Rear Differential

Special Tools

07SAZ-001000A Backprobe Set 207AAD-S9VA000 Driveshaft Remover 1

07/05/09 16:43:09 61SJC020_150_0002

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15-3

Component Location Index

VTM-4 LOCK SWITCH

REAR DIFFERENTIAL BREATHER LINE

VTM-4 LOCKINDICATOR

VTM-4 INDICATORVTM-4 CONTROL UNIT

REAR DIFFERENTIAL ASSEMBLY

VTM-4 RELAY

Test, page 15-49Replacement, page 15-49

Replacement, page 15-51

Replacement, page 15-50

Removal, page 15-53Installation, page 15-56

Test, page 22-75Replacement, page 15-50

07/05/09 16:43:11 61SJC020_150_0003

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VTM-4 Indicator

Diagnostic Trouble Code (DTC)

Self-diagnosis

15-4

Rear Differential

General Troubleshooting Information

The VTM-4 indicator comes on under certain conditions even if the 4WD system is working normally. Here are someexamples:

• When you use high-powered wireless equipment such as a CB or Ham radio in the vehicle.• When you keep spinning the front wheels while the vehicle is stuck in sand, mud, snow, etc.• When the battery voltage suddenly drops below 8 volts or rises above 16 volts.

After the VTM-4 indicator comes on, it stays on until you turn the ignition switch off.

• The VTM-4 control unit can memorize up to seven different DTCs. The system displays the DTCs by blinking theVTM-4 indicator. Multiple DTCs are displayed in the order they occured, beginning with the most recent.

• If the same DTC is detected more than once, the most recent DTC is written over the earlier one. Therefore, when thesame problem is detected more than once, it is memorized as a single DTC.

• The DTCs are memorized in the EEPROM (non-volatile memory). Therefore, the memorized DTCs are not clearedwhen the battery is disconnected or the VTM-4 control unit is disconnected.

• If there is a problem in the central processing unit (CPU) of the VTM-4 control unit, the VTM-4 indicator comes on,but no DTC is memorized.

When a problem is detected by self-diagnosis, the system does the following:

• Turns the VTM-4 indicator on.• Memorizes the DTC.• Stops 4WD control and puts the vehicle back in 2WD (FWD).• Reduces engine torque to suit the driving conditions when the abnormality was detected.

07/05/09 16:43:11 61SJC020_150_0004

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Initialization of the VTM-4 Control Unit

Initialization with the HDS

Manual Initialization

15-5

A

VTM-4INDICATOR

VTM-4 LOCKINDICATOR

ON

OFF

Enginestart

VTM-4 LOCKswitch push

Enginestop

IG switchON (II)

4 sec

4 sec

ON

OFF

Whenever the VTM-4 control unit is replaced, it must beinitialized to make the 4WD system function.There are two methods used to initialize the VTM-4control unit. The recommended method is to use theHonda Diagnostic System (HDS) with the appropriatesoftware plugged into the data link connector (DLC).

The other method is to initialize the VTM-4 control unitmanually.

1. With the ignition switch OFF, connect the HDS tothe data link connector (DLC) (A) (located behindthe driver’s dashboard lower cover).

2. Make sure the HDS communicates with the VTM-4control unit. If it doesn’t go to the DLC circuittroubleshooting (see page 11-194).

3. Turn the ignition switch ON (II), and follow theprompts on the HDS screen.

NOTE: See the HDS user’s manual for specificinstruction.

1. Start the engine (the VTM-4 indicator comes on,and the VTM-4 LOCK switch indicator is off).

2. Apply the brakes, and move the shift lever to eitherR, 1, or 2, then push the VTM-4 LOCK switch (theVTM-4 indicator stays on, and the VTM-4 LOCKswitch indicator is on). The 4WD system is now inlock mode.

3. Turn the ignition switch OFF.

4. Turn the ignition switch ON (II) (the VTM-4 indicatorand the VTM-4 LOCK indicator both come on for4 seconds, then go off). The VTM-4 control unit isinitialized.

(cont’d)

07/05/09 16:43:12 61SJC020_150_0005

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How to Check for DTCs

HDS Method

Service Check Signal Circuit (SCS) Method

15-6

Rear Differential

General Troubleshooting Information (cont’d)

A

A

When the VTM-4 control unit senses an abnormality inthe input or output systems, the VTM-4 indicator in thegauge control module will usually come on, and themalfunction indicator lamp (MIL), the D5 indicator, and/or the VSA indicator may also come on.There are two methods used to check for DTCs. Therecommended method is to use the HDS with theappropriate software plugged into the data linkconnector (DLC).

The other method is to connect the service check signal(SCS) circuit with the HDS. When the data linkconnector (DLC) is connected to the HDS, the VTM-4indicator will blink the diagnostic trouble code (DTC)when the ignition switch is turned ON (II) and the SCScircuit is connected to body ground.



3. Turn the ignition switch ON (II), and follow theprompts on the HDS to display the DTC(s) on thescreen. After determining the DTC(s), refer to theDTC Troubleshooting.


4. If there are fuel and emissions DTCs, A/T DTCs, orVSA DTCs at the same time, troubleshoot the fueland emissions DTCs first, then A/T DTCs second,then VSA third, and then VTM-4 last.

5. After recording the DTCs, clear all DTCs.

6. Test-drive the vehicle for several minutes in 4WDmode, and check for DTCs. If the DTC returns, referto the DTC Troubleshooting. If the DTC does notreturn, there was an intermittent problem withinthe circuit. Make sure all connectors and terminalsin the circuit are tight.

1. Park the vehicle on level ground. Shift to P, thenturn off the engine.

2. Release the parking brake pedal.


4. Short the SCS circuit to body ground with the HDS.

07/05/09 16:43:12 61SJC020_150_0006

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How to Troubleshoot Circuits at the VTM-4Control Unit

Special Tools Required

15-7

Long blinks Short blinks

(2) (4)

OFF

See DTC 24

A07SAZ-001000A

B07SAZ-001000A

C

5. Turn the ignition switch ON (II), and observe theVTM-4 indicator.

NOTE: Codes above 10 are indicated by a series oflong and short blinks. One long blink equals 10short blinks. Add the long and short blinks togetherto determine the code. After determining the code,refer to the DTC Troubleshooting.

6. Record all the DTC(s), then refer to the DTCTroubleshooting to determine the meaning of eachDTC.

7. Clear the DTCs from the VTM-4 control unitmemory.

8. If the MIL, D5 indicator, or the VSA indicator allcome on at the same time, troubleshoot the causefor the MIL first, then A/T DTCs second, then VSAthird, and then VTM-4 last.

9. Test-drive the vehicle for several minutes in 4WDmode, and check for DTCs.If the DTC returns, refer to the DTC Troubleshooting.If the DTC does not return, there was anintermittent problem within the circuit. Make sureall connectors and terminals in the circuit are tight.

Backprobe set 07SAZ-001000A (two required)

1.

2. Inspect the circuit on the VTM-4 control unitaccording to the DTC Troubleshooting using thespecial tools and a digital multimeter or an analogcircuit tester.

3. Connect the backprobe adapters (A) to the stackingpatch cords (B), and connect the cords to themultimeter or an analog circuit tester (C). Using thewire insulator as a guide for the contoured-tip ofthe backprobe adapter, gently slide the tip into theconnector from the wire side until it comes incontact with the terminal end of the wires.

(cont’d)

07/05/09 16:43:12 61SJC020_150_0007

Remove the right side kick panel (see page 20-60)to gain access tothe VTM-4 control unit.

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How to Clear the VTM-4 Control UnitMemory

HDS method

Service Check Signal Circuit (SCS) Method

15-8

Rear Differential

General Troubleshooting Information (cont’d)

A

A

There are two methods used to clear DTCs from theVTM-4 control unit memory. The recommendedmethod is to use the HDS with the appropriate softwareplugged into the data link connector (DLC).

The other method is to connect the service check signal(SCS) connector with the HDS, and manually clear thememory.



3. Turn the ignition switch ON (II), and follow theprompts on the HDS screen to clear the DTC(s).


1. Park the vehicle on level ground. Shift to P, thenturn off the engine.

2. Release the parking brake pedal.


4. Short the SCS circuit to body ground with the HDS.

5. Turn the ignition switch ON (II).

6. The VTM-4 indicator comes on and stays on for4 seconds. Press and hold the VTM-4 LOCK swtichwhile the VTM-4 indicator is on.

7. When the VTM-4 indicator goes off, release theVTM-4 LOCK switch.

8. The VTM-4 indicator comes on and stays on for4 seconds. Press and hold the VTM-4 LOCK switchwhile the VTM-4 indicator is on.

07/05/09 16:43:13 61SJC020_150_0008

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How to End a Troubleshooting Session(required after any troubleshooting)

15-9

IGNITIONSWITCH

PARKING BRAKESWITCH

PGM TESTERCONNECT

VTM-4INDICATOR

VTM-4 LOCKINDICATOR

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

IG switch ON (II)

4 sec 4 sec 0.3 sec 0.3 sec

0.3 sec

VTM-4 LOCKswitch pushed

VTM-4 LOCKswitch released

VTM-4 LOCKswitch pushed

VTM-4 LOCKswitch released

9. When the VTM-4 indicator goes off, release theVTM-4 LOCK switch. The VTM-4 indicator will blinktwice quickly to confirm that the DTCs have beencleared from the VTM-4 control unit memory.

NOTE: If the VTM-4 indicator does not blink twicequickly, the memory has not been cleared. Turn theignition switch OFF, then repeat steps 5 through 9.

10. Turn the ignition switch OFF, then disconnect theHDS from the data link connector (DLC).


2. Clear the DTCs from the VTM-4 control unitmemory.

3. Disconnect the HDS from the data link connector(DLC).

4. Verify that the problem has been repaired; test-drive the vehicle for several minutes in 4WD mode.

07/05/09 16:43:13 61SJC020_150_0009

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DTC VTM-4Indicator

Detection Item Possible Cause Page

15-10

Rear Differential

DTC Troubleshooting Index

•••••

••••

•

•••••••••

•••

••••

•••••••

••••••••••

21-1 ON Left-front wheel sensor Sensor is defectiveOpen or short in the wire harnessVTM-4 control unit is defectiveVSA modulator-control unit is defective

(see page 15-20)22-1 ON Right-front wheel sensor23-1 ON Left-rear wheel sensor (see page 15-22)24-1 ON Right-rear wheel sensor26-1 ON VSA modulator-control unit or wire

harnessOpen or short in the wire harness from theVTM-4 control unit to VSA modulatorVSA modulator-control unit is defective

(see page 15-24)

37-1 ON Engine RPM signal circuit Open or short in the wire harnessVTM-4 control unit or PCM is defective

(see page 15-25)38-1 ON41-1 ON CAN communication (PCM/VSA system) Open or short in the wire harness from the

VTM-4 control unit to PCM/VSAVTM-4 control unit or PCM is defective orVSA modulator-control unit is defective

(see page 15-27)

42-1 ON Differential oil temperature sensor Sensor is defectiveOpen or short in the wire harnessVTM-4 control unit is defective

(see page 15-29)43-1 ON

44-1 ON VTM-4 relay Relay is defectiveOpen or short in the wire harnessVTM-4 control unit is defective

(see page 15-30)

51-1 ON Left clutch electromagnetic coil Electromagnetic coil is defectiveOpen or short in the wire harnessVTM-4 control unit is defective

(see page 15-32)52-1 ON53-1 ON54-1 ON55-1 ON Right clutch electromagnetic coil Electromagnetic coil is defective

Open or short in the wire harnessVTM-4 control unit is defective

(see page 15-34)56-1 ON57-1 ON58-1 ON59-1 ON Right/left clutch electromagnetic coil

power supplyLow battery voltageFault in the charging systemVTM-4 control unit is defective

(see page 15-37)

73-1 ON MAP (manifold absolute pressure)sensor or PCM

Fault in the PCM system/MAP (manifoldabsolute pressure) sensor is defective

(see page 15-37)

76-1 ON Rear differential clutch warning system Sensor is defectiveOpen or short in the wire harnessVTM-4 control unit is defectiveVSA modulator-control unit is defective

(see page 15-38)

77-1 ON PCM PCM is defective (see page 15-40)78-1 ON VTM-4 control unit VTM-4 control unit is defective (see page 15-40)41-2 ON CAN communication (PCM/VSA system) Open or short in the wire harness from

VTM-4 control unit to PCM (or VSA)(see page 15-27)

42-2 ON Differential oil temperature sensor Sensor is defectiveOpen or short in the wire harnessVTM-4 control unit is defective

(see page 15-29)

21-2 ON Left-front wheel sensor Sensor is defectiveOpen or short in the wire harnessVTM-4 control unit is defectiveVSA modulator-control unit is defective

(see page 15-20)22-2 ON Right-front wheel sensor23-2 ON Left-rear wheel sensor (see page 15-22)24-2 ON Right-rear wheel sensor53-2 ON Left or Right clutch electromagnetic coil Electromagnetic coil is defective

Open or short in the wire harnessVTM-4 control unit is defective

(see page 15-32)(see page 15-34)

: DTCs are indicated by the VTM-4 indicator when the data link connector (DLC) is connected to the HDS.

07/05/09 16:43:13 61SJC020_150_0010

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Symptom Diagnostic Procedure Also check for

15-11

Symptom Troubleshooting Index

The VTM-4 indicatorcomes on, but no DTCsare stored in any system:VTM-4, VSA, or PCM

Symptom troubleshooting (see page 15-41).

The VTM-4 indicator doesnot come on


The VTM-4 LOCKindicator does not comeon when the VTM-4 LOCKswitch is pressed


The VTM-4 LOCKindicator comes on whenthe ignition switch isturned ON (II) and doesnot go off


The VTM-4 LOCKindicator does not comeon for about 4 secondswhen the ignition switchis turned ON (II)


Noise and judder whenturning at full lock

1.

2.3.4.

Drain and refill the rear differential with new VTM-4 fluid(see page 15-47).Do the Differential Function Test (see page 15-48).Repeat steps 1 and 2.Drain the rear differential, then install new drain plugwashers, and refill with new VTM-4 fluid (see page 15-47).

Clunk noise and then abump when backing andturning

Normal clutch engagement at throttle opening

07/05/09 16:43:13 61SJC020_150_0011

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15-12

Rear Differential

System Description

VTM-4LOCKSWITCH

VTM-4 SYSTEM

VTM-4CONTROLUNIT

REAR DIFFERENTIALASSEMBLY

PCM

VSAMODULATOR-CONTROL UNIT

Oil temperaturesensor signal

Right wheelcontrol current

Left wheelcontrol current

This vehicle is equipped with a rear differential system called the variable torque management 4WD (VTM-4) system.The VTM-4 control unit controls the current flowing through electromagnetic coils to engage and disengage the rightand left clutches in the rear differential assembly.The operation of the VTM-4 system consists of the following functions:

• Vehicle acceleration torque control (VATC)• Limited slip differential (LSD)• Lock control

These functions automatically combine to distribute driving torque between the front and rear wheels when thevehicle is being accelerated or when wheels are slipping. When the vehicle speed is about 18 mph (30 km/h) or below,and the transmission is in R, 2, or 1, the system will manually engage the rear differential clutches when the VTM-4LOCK switch is pressed. By design, in lock mode, the torque is reduced gradually at speeds above 6 mph (10 km/h) tominimize the load on the 4WD system.The VTM-4 control unit has a fail-safe function, a self-diagnosis function, and a provision to communicate with theHDS.

07/05/09 16:43:14 61SJC020_150_0012

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15-13

Amount of controlN·m (kgf·m)

Deceleration0

Acceleration

Acceleration of vehicle(calculation from driving torque)

Amount of controlN·m (kgf·m)

0Front wheelrotation small

Front wheelrotation large

Rotation difference betweenfront wheel and rear wheel

100

6

Amount of control(%)

Velocity of vehicle(mph)

• VATC ControlThe torque to be delivered to the rear wheels is calculated based on the acceleration of the vehicle calculated in theVTM-4 control unit.

• LSD ControlThe torque to be delivered to the rear wheels is calculated based on the differences in speed and accelerationbetween the front and rear wheels.

• LOCK ControlRear differential clutch lock control is done by pushing the VTM-4 LOCK switch manually when the shift lever is inR, 1, or 2.

(cont’d)

07/05/09 16:43:14 61SJC020_150_0013

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Electronic Control System

VTM-4 Control Unit Electrical Connections

15-14

Rear Differential

System Description (cont’d)

VTM 4LOCK SWITCH

A8LOCKSW

REAR DIFFERENTIAL

IGNITION SWITCH

VTM 4 LOCK INDICATOR

VTM 4 INDICATOR

B5PG

A18K LINE

SCSA20

A11CANH

CANLA22

NEPA12

PARKING BRAKE SWITCH

A5RLP

RRPA3

A7FRP

A1

A4

VTM 4 RELAY

IG1

TOLA13

A15TOH

PWRB7

A16PARBRK

B12LG2

LG1A10

LOCKLA16

LCOLB2

RCOLB4

B11WARN2

FLPA9

WARN1A14

VTM 4 CONTROL UNIT

IG1

FSR

B1

B3

LCOH

RCOH

BATTERY

IG1 HOT in ON (II) andSTART (III)

RIGHT CLUTCHELECTROMAGNETICCOIL

LEFT CLUTCHELECTROMAGNETICCOIL

DIFFERENTIALOILTEMPERATURESENSOR

VSAMODULATORCONTROLUNIT

POWERTRAINCONTROLMODULE(PCM)

DATA LINKCONNECTOR

GAUGE CONTROLMODULE

07/05/09 16:43:14 61SJC020_150_0014

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VTM-4 Control Unit Inputs and Outputs

Terminal

number

Wire color Terminal sign

(Terminal name)

Description Measurement

Conditions Voltage

15-15

VTM-4 Control Unit Connector Terminal Locations

B (12P) A (22P)

The VTM-4 control unit terminal voltage and measuring conditions for the 4WD control system are shown.

NOTE: Measure voltage with the connectors connected.

A1 YEL IG1 (Ignition 1) Power supply foractivating the system

Ignition switchON (II)

Battery voltage

A3 GRY/RED RRP (Rear rightpulse)

Detect right-rear wheelsensor signal

Turn wheel at 1rotation/second

A4 ORN/GRN FSR (Fail-saferelay)

Drives VTM-4 relay Ignition switchON (II)

Battery voltage

Engine running Less than 1 VA5 GRY/YEL RLP (Rear left

pulse)Detects left-rear wheelsensor signal


A6 GRN/ORN PARBRK (Parkingbrake)

Detects parking brakesignal

Parking brake on Less than 2 VParking brake off Battery voltage

A7 LT GRN FRP (Front rightpulse)

Detects right-frontwheel sensor signal


A8 BRN/WHT LOCKSW (LOCKswitch)

Detects VTM-4 LOCKswitch signal


Less than 1 V

VTM-4 LOCK mode Battery voltageA9 WHT/RED FLP (Front left

pulse)Detects left-front wheelsensor signal


(cont’d)

There should be 0about 5 V repeatedly.(A digital voltmeterreads about 2.5 V whenthe wheel is turningfaster.)




Wire side of female terminals

07/05/09 16:43:15 61SJC020_150_0015

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VTM-4 Control Unit Inputs and Outputs

Terminal

number


(Terminal name)


Conditions Voltage

15-16

Rear Differential

System Description (cont’d)

VTM-4 Control Unit Connector Terminal Locations

B (12P) A (22P)

The VTM-4 control unit terminal voltage and measuring conditions for the 4WD control system are shown.

NOTE: Measure voltage with the connectors connected.

A10 BLK LG1 (Logic ground) Ground Less than 0.5 VA11 WHT CANH

(CANcommunicationsignal high)

CAN communicationsignal


About 2.5 V (pulses)

A12 BLU NEP(Engine revolution)

Detects enginerevolution signal


Above 8 V

Engine running at1,000 rpm

5 8 V

A13 BLK TOL(Temperature oillow)

Detects differential oiltemperature sensorsignal

Check at normaltemperature withthe ignition switchON (II)

1 3.6 V

A14 RED/WHT WARN1 (Warning1)

Drives VTM-4 indicator VTM-4 indicator on Less than 4 VVTM-4 indicator off Battery voltage

A15 WHT TOH(Temperature oilhigh)

Power supply fordifferential oiltemperature sensor

Check at normaltemperature withthe ignition switchON (II)

4 5 V

A16 YEL/BLK LOCKL (Lock lamp) Drives VTM-4 LOCKindicator

VTM-4 LOCKindicator on

Less than 4 V

VTM-4 LOCKindicator off

Battery voltage

A18 LT BLU K-LINE Communication signalto HDS

Ignition switchON (II) (Notconnected to HDS)

About 9.0 V

A20 BRN SCS(Service checksignal)

Detects service checkconnector signal

SCS circuit shorted Less than 2 VSCS circuit opened About 5 V

A22 RED CANL(CANcommunicationsignal low)

CAN communicationsignal


About 2.5 V (pulses)


07/05/09 16:43:15 61SJC020_150_0016

Terminal

number


(Terminal name)


Conditions Voltage

15-17

B1 BLK/RED LCOH (Left coilhigh)

Drives left clutchelectromagnetic coil(positive)


Less than 1 V

Engine running Less than 1 VVTM-4 LOCK mode Above 3 V

B2 BLK/WHT LCOL (Left coillow)

Drives left clutchelectromagnetic coil(negative)


Less than 1 V

Engine running Less than 1 VVTM-4 LOCK mode Less than 1 V

B3 BRN RCOH (Right coilhigh)

Drives right clutchelectromagnetic coil(positive)


Less than 1 V

Engine running Less than 1 VVTM-4 LOCK mode Above 3 V

B4 GRN RCOL (Right coillow)

Drives right clutchelectromagnetic coil(negative)


Less than 1 V

Engine running Less than 1 VVTM-4 LOCK mode Less than 1 V

B5 BLK PG (Power ground) Ground Less than 0.5 VB7 RED/BLU PWR (Power) Power supply for

VTM-4 control unit10 seconds afterignition switchON (II)

Less than 3 V

Engine running Battery voltageVTM-4 LOCK mode Battery voltage

B11 RED/WHT WARN2 (Warning2)

Drives VTM-4 indicator VTM-4 indicator on Less than 4 VVTM-4 indicator off Battery voltage

B12 BLK LG2 (Logic ground) Ground Less than 0.5 V

07/05/09 16:43:15 61SJC020_150_0017

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15-18

Rear Differential

Circuit Diagram

A6G1 BAT

YEL

YEL

LIGHTINDICATOR

GAUGE CONTROL MODULE

RED

C3

(20 A)No.4

No.21 (7.5 A)

VTM 4 CONTROL UNIT

RED/BLK

YEL

RED/WHT

VTM 4 LOCK SWITCH 42

1 35

YEL

IG1

IGNITION SWITCH

BRN/WHTYEL/BLKRED/WHT

A14

WARN1

A8

LOCKSW

A16

LOCKH

PWR

B7A4

FSR

A1

IG1

RED/WHT

WARN2

B11

ORN/GRN RED/BLU

3 2

15

BLK/YEL WHT/RED

No.23 (IG) (50 A)

BATTERY

UNDER HOOD FUSE/RELAY BOX

No.22 (BAT) (120 A) No.18 (15 A)

UNDER DASHFUSE/RELAY BOX

IG1 HOT in ON (II) andSTART (III)

VTM 4RELAY

VTM 4INDICATOR

TAILLIGHTRELAY

DASH LIGHTSBRIGHTNESSCONTROLLER(In the gaugecontrol module)

AUXILIALYUNDER HOODFUSE BOX

D1

N44

A

A

07/05/09 16:43:15 61SJC020_150_0018

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15-19

GRN/ORN

GRN/ORN

G601

GRNBRN WHT BLKBLK/WHTBLK/RED

3712

RED WHT

PG

B5

BLK

4

BLK

BRN/BLK

REAR DIFFERENTIAL

LCOL

B2

LCOH

B1

1 2

BLK/RED BLK/WHT

A18

K LINE

LT BLU

SCS

A20

BRN

9 7

DATA LINK CONNECTOR

A1A28

: Shielding

G501

262875

VSA MODULATOR CONTROL UNIT

WHT/REDLT GRNGRY/RED GRY/YEL

A5

RLP

A3

RRP FRP

A7

FLP

A9

RED

BLU

WHT

A36

WHTRED

TOL

A13

TOH

A15

52

BLKWHT

6 3

BRN GRN

RCOL

B4

RCOH

B3

GRN/ORN

BRN/YELBLK

B12

LG

A10

LG

PARBRK

A6

A11

CANHCANL

A22A12

NEP

RIGHT CLUTCHELECTROMAGNETICCOIL

DIFFERENTIAL OILTEMPERATURESENSOR

POWERTRAIN CONTROLMODULE (PCM)

MULTIPLEXINTEGRATEDCONTROLUNIT (MICU)

PARKINGBRAKESWITCH

VTM 4CONTROLUNIT

LEFT CLUTCHELECTROMAGNETICCOIL

07/05/09 16:43:16 61SJC020_150_0019

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１２１１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

DTC 21-1, 21-2, 22-1, 22-2:

YES

NO

YES

NO

YES

NO

YES

NO

15-20

Rear Differential

DTC Troubleshooting

VTM-4 CONTROL UNIT CONNECTOR A (22P)

FLP (WHT/RED)FRP (LT GRN)

Front WheelSensors

NOTE: Before you troubleshoot, review the generaltroubleshooting information (see page 15-4).


2. Clear the DTC (see page 15-8).

3. Test-drive the vehicle, and check for DTCs with theHDS.

Go to step 4.

Intermittent failure, the system is OK at thistime.

4. Check for DTCs in the VSA system with the HDS.

Go to the indicated DTCs troubleshooting.

Go to step 5.


6. Raise the vehicle, and make sure it is securelysupported.

7. Spin the rear wheels by hand, and check for rearbrake drag.

Repair cause of rear brake drag, and retest.

Go to step 8.


9. Measure voltage between the No. 7 and No. 9terminals of the VTM-4 control unit connector A(22P) and body ground while rotating theappropriate wheel (1 rotation/second).

DTC Appropriate Terminal21 (Left-front) A922 (Right-front) A7

Go to step 16.

Go to step 10.


11. Disconnect the VTM-4 control unit connector A(22P) and the VSA modulator-control unit 46Pconnector.


Is DTC 21-1, 21-2, and/ or 21-2 indicated?

Are there any VSA DTCs indicated?

Are the rear brakes dragging?

Is there about 2 V to 3 V?

07/05/09 16:43:16 61SJC020_150_0020

０２

０３

０４

－

－－

－

－

－

YES

NO

YES

NO

YES

NO

15-21





JUMPER WIRE JUMPER WIRE

VSA MODULATOR-CONTROL UNIT 46P CONNECTOR

FRP (LT GRN)FLP (WHT/RED)

12. Check for continuity between the terminals No. 7and No. 9 of VTM-4 control unit connector A (22P)and body ground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A7 and/or A9) and the VSAmodulator-control unit.

Go to step 13.

13. Connect the terminals No. 7 and No. 9 of VTM-4control unit connector A (22P) to body ground withthe jumper wires.

14. Disconnect the VSA modulator-control unit 46Pconnector.

15. Check for continuity between the VSA modulator-control unit 46P connector terminals and bodyground.

Appropriatewheel

Appropriate TerminalVSA modulator-control unit

Right-front 28Left-front 26

Go to step 16.

Repair open in the wire between the VTM-4control unit (A7 and/or A9) and the VSA modulator-control unit.

16. Check for poor connections or loose terminals atthe VTM-4 control unit and the VSA modulator-control unit connectors. If the connections are OK,replace the VTM-4 control unit, then go to step 17.


Replace the VSA modulator-control unit(see page 19-94).

The system is OK at this time.




Is there continuity?


Is DTCs 21-1, 21-2, and/ or 22-2 indicated?

07/05/09 16:43:51 61SJC020_150_0021

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１２３１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

DTC 23-1, 23-2, 24-1, 24-2:

YES

NO

YES

NO

YES

NO

YES

NO

15-22

Rear Differential

DTC Troubleshooting (cont’d)


RLP (GRY/YEL)RRP (GRY/RED)

Rear WheelSensors




3. Start the engine, shift the transmission into D. Test-drive the vehicle at speeds over 25 mph (40 km/h),while keeping the engine speed below 2,500 rpmfor at least 30 seconds.

NOTE: Be careful not to overheat the reardifferential clutch system.

4. Check for DTSs with the HDS.

Go to step 5.




Go to step 6.





Go to step 9.



DTC Appropriate Terminal23 (Left-rear) A524 (Right-rear) A3

Go to step 18.

Go to step 11.


12. Disconnect the VTM-4 control unit connector A(22P) and the VSA modulator-control unit 46Pconnector.

Wire side of female terminalsIs DTCs 23-1, 23-2, 24-1, and/ or 24-2 indicated?



Is there about 2 V to 3 V?

07/05/09 16:43:51 61SJC020_150_0022

０２

０３

０４

－

－－

－

－

－

YES

NO

YES

NO

YES

NO

15-23






RLP (GRY/YEL) RRP (GRY/RED)


13. Check for continuity between the same terminal ofVTM-4 control unit connector A (22P) and bodyground.


Go to step 14.

14. Connect the terminals No. 3 and No. 5 of VTM-4control unit connector A (22P) to body ground withthe jumper wires.

15. Disconnect the VSA modulator-control unit 46Pconnector.


Appropriatewheel

Appropriate TerminalVSA modulator-control unit

Right-rear 5Left-rear 7

Go to step 17.


17. Check for poor connection or loose terminals at theVTM-4 control unit and the VSA modulator-controlunit connectors. If the connections are OK, replacethe VTM-4 control unit, then go to step 18.



19. Check for DTCs with the HDS.








Is DTCs 23-1, 23-2, 24-1, and/ or 24-2 indicated?

07/05/09 16:43:51 61SJC020_150_0023

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１２６１ＦＡＡＴ００

－

－

－

－－

－

DTC 26-1:

YES

NO

YES

NO

YES

NO

15-24

Rear Differential



RRP (GRY/RED) FLP (WHT/RED)

RLP(GRY/YEL)

FRP(LT GRN)

VSA Modulator-Control Unit orWire Harness





Go to step 4.




Go to step 5.




8. Measure voltage between the No. 3, No. 5, No. 7,and No. 9 terminals of the VTM-4 control unitconnector A (22P) and body ground while rotatingthe appropriate wheel one rotation a second.

Appropriate wheel Appropriate TerminalLeft-front A9

Right-front A7Left-rear A5

Right-rear A3

Check for poor connections or looseterminals at the VTM-4 control unit. If theconnections are OK, replace the VTM-4 control unit(see page 15-50).

Check for poor connections or loose terminalsbetween the VTM-4 control unit and the VSAmodulator-control unit. If the connections are OK,replace the VSA modulator-control unit (see page19-94).


Is DTC 26-1 indicated?


Are all f our readings about 2 V to 3 V?

07/05/09 16:43:52 61SJC020_150_0024

－

０１

０２

ＳＪＣ８Ａ００Ｋ８０２０００８１３７１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

DTC 37-1, 38-1:

YES

NO

YES

NO

YES

NO

YES

NO

15-25


NEP (BLU)


NEP (BLU)

Engine RPM Signal Circuit




3. Test-drive the vehicle, and check for DTSs with theHDS.

Go to step 4.


4. Check for DTC’s in the PGM-FI DTCs indicated


Go to step 5.


6. Disconnect VTM-4 control unit connector A (22P).


8. Measure voltage between the No. 12 terminal ofthe VTM-4 control unit connector A (22P) and bodyground with the engine running.

Condition VoltageIgnition switch ON (II) Above 8 V

Engine speed at 1,000 rpm 5 8 V

Go to step 18.

Go to step 9.


10. Jump the SCS line with the HDS.

11. Disconnect PCM connector A (44P).


13. Measure voltage between the No. 12 terminal ofthe VTM-4 control unit connector A (22P) and bodyground.

Repair short to power in the wire betweenthe VTM-4 control unit (A12) and the PCM (A28).

Go to step 14.


(cont’d)



Is DTCs 37-1 and/ or 38-1 indicated?

Are there any PGM-FI DTCs indicated?

Is the voltage correct?

Is there voltage?

07/05/09 16:43:52 61SJC020_150_0025

０３

０１

０２

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

15-26

Rear Differential



NEP (BLU)


NEP (BLU)

JUMPER WIRE

PCM CONNECTOR A (44P)

NEP (BLU)

15. Check for continuity between the No. 12 terminal ofthe VTM-4 control unit connector A (22P) and bodyground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A12), and the PCM (A28).

Go to step 16.

16. Connect the No. 12 terminal of the VTM-4 controlunit connector A (22P) to body ground with ajumper wire.

17. Check for continuity between the No. 28 terminal ofthe PCM connector A (44P) and body ground.

Go to step 18.

Repair open in the wire between the VTM-4control unit (A12), and the PCM (A28).

18. Check for poor connections or loose terminals atthe VTM-4 control unit, and the PCM connectors. Ifthe connections are OK, replace the VTM-4 controlunit, then go to step 19.

19. Test-drive the vehicle, and watch the VTM-4indicator.

Replace the PCM (see page 11-205).





Is there continuity?Is there continuity?


07/05/09 16:43:52 61SJC020_150_0026

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１４１１ＦＡＡＴ０１

－

－

－

－

－

－

DTC 41-1, 41-2:

YES

NO

YES

NO

YES

NO

15-27


CANH (WHT)


CANH (WHT)

CANH (WHT) CANH (WHT)


CAN Communication (PCM/VSA System)





Go to step 4.


4. Check for a PCM/VSA system DTCs.

Troubleshoot the indicated PCM/VSADTCs.

Go to step 6.

5. Disconnect the VTM-4 control unit connector A(44P), and VSA modulator-control unit 46Pconnector.


7. Jump the SCS line with the HDS.

8. Disconnect the PCM connector A (44P).

9. Check for continuity between the VTM-4 controlunit connector A (22P) terminal No. 11 and PCMconnector A (44P) terminal No. 44, and between theVTM-4 control unit connector A (22P) terminalNo. 11 and VSA modulator-control unit 46Pconnector terminal No. 33.

Go to step 10.

Repair open in the wire between the VTM-4control unit (A11) and the PCM (A44), the VSAmodulator-control unit.

(cont’d)





Is there a DTCs?


07/05/09 16:43:53 61SJC020_150_0027

０２

－

－

YES

NO

15-28

Rear Differential




CANL (RED)

CANL (RED)

CANL (RED)


10. Check for continuity between the VTM-4 controlunit connector A (22P) terminal No. 22 and PCMconnector A (44P) terminal No. 9, and between theVTM-4 control unit connector A (22P) terminalNo. 22 and VSA modulator-control unit 46Pconnector terminal No. 12.

Check for poor connections or looseterminals at the VTM-4 control unit, PCM, VSAmodulator-control unit connectors. If theconnections are OK, replace the VTM-4 control unit(see page 15-50).

Repair open in the wire between the VTM-4control unit (A22) and the PCM (A9), the VSAmodulator-control unit.





07/05/09 16:43:53 61SJC020_150_0028

０１

０２

０３

ＳＪＣ８Ａ００Ｋ８０２０００８１４２１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

DTC 42-1, 42-2, 43-1:

YES

NO

YES

NO

YES

NO

YES

NO

15-29

DIFFERENTIAL OIL TEMPERATURESENSOR 2P CONNECTOR


TOH (WHT)TOL (BLK)


TOH (WHT)TOL (BLK)

Differential OilTemperature Sensor




3. Test-drive the vehicle, and check for DTCs with inthe HDS.

Go to step 4.



5. Remove the wire harness cover from the reardifferential (see page 15-49).

6. Disconnect the 2P connector from the differentialoil temperature sensor, then measure resistancebetween the No. 1 and No. 2 terminals of thedifferential oil temperature sensor.

Oil temperature Resistance32 °F (0 °C) 5.82 k to 7.26 k86 °F (30 °C) 1.53 k to 1.83 k212 °F (100 °C) 148 to 162284 °F (140 °C) 52 to 61

Go to step 7.

Replace the differential oil temperaturesensor (see page 15-49).

7. Disconnect VTM-4 control unit connector A (22P).


9. Measure voltage between the No. 13 and No. 15terminals of the VTM-4 control unit connector A(22P) and body ground.

Repair short to power in the wire betweenthe VTM-4 control unit (A13 or A15) and thedifferential oil temperature sensor.

Go to step 10.


11. Check for continuity between the No. 13 and No. 15terminals of the VTM-4 control unit connector A(22P) and body ground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A13 or A15) and thedifferential oil temperature sensor.

Go to step 12.

(cont’d)

Terminal side of male terminals



Is DTCs 42-1, 42-2, and/ or 43-1 indicated?

Is the resistance correct?

Is there voltage?


07/05/09 16:43:53 61SJC020_150_0029

０２

０３

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１４４１ＦＡＡＴ００

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

DTC 44-1:

15-3015-30

Rear Differential


DIFFERENTIAL OIL TEMPERATURESENSOR 2P CONNECTOR

JUMPER WIRE


TOH (WHT)TOL (BLK)

VTM-4 CONTROL UNIT CONNECTORS

PWR (RED/BLU)

FSR (ORN/GRN)

A (22P) B (12P)

12. Connect the differential oil temperature sensor 2Pconnector terminals to body ground with jumperwires.

13. Check for continuity between the No. 13 and No. 15terminals of the VTM-4 control unit connector A(22P) and body ground.

Check for poor connections or looseterminals at the VTM-4 control unit and thedifferential oil temperature sensor connectors. Ifthe connections are OK, replace the VTM-4 controlunit (see page 15-50).

Repair open in the wire between the VTM-4control unit (A13 or A15) and the differential oiltemperature sensor.





Go to step 4.


4. Measure voltage between the No. 4 terminal of theVTM-4 control unit connector A (22P) and bodyground, and between the No. 7 terminal of theVTM-4 control unit connector B (12P) and bodyground with the ignition switch ON (II), and with theengine started.

Condition B7 (PWR) A4 (FSR)Ignition switch

ON (II)Less than 3 V Battery

voltageEngine start Battery

voltageLess than 1 V

Go to step 16.

Go to step 5.


VTM-4 Relay

Terminal side of female terminals


Wire side of female terminalsIs there continuity?


Is the voltage correct?

07/05/09 16:43:54 61SJC020_150_0030

０１

０３

０４

－

－

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

YES

NO

15-31

VTM-4 RELAY 5P CONNECTOR

BLK/YEL

WHT/RED

PWR (RED/BLU)

FSR (ORN/GRN)


A (22P) B (12P)

PWR (RED/BLU)

FSR (ORN/GRN)


A (22P) B (12P)

6. Remove the VTM-4 relay, and test it (see page22-75).

Go to step 7.

Replace the VTM-4 relay (see page 15-50).

7. Turn the ignition switch ON (II) with the VTM-4relay removed.

8. Measure voltage between the No. 1 and No. 5terminals of the VTM-4 relay 5P connector andbody ground.

Go to step 9.

Check for blown No. 4 (20 A) fuse in theauxiliary fuse box or No. 18 (15 A) fuse in thedriver’s under-dash fuse/relay box. If the fuses areOK, repair open in the wire between the auxiliaryfuse box or the driver’s under-dash fuse/relay boxand the VTM-4 relay.


10. Disconnect the VTM-4 control unit connector A(22P) and connector B (12P).


12. Measure voltage between the No. 4 terminal of theVTM-4 control unit connector A (22P) and bodyground, and between the No. 7 terminal of theVTM-4 control unit connector B (12P) and bodyground.

Repair short to power in the wire betweenthe VTM-4 control unit (A4 or B7) and the VTM-4relay.

Go to step 12.


14. Check for continuity between the No. 4 terminal ofthe VTM-4 control unit connector A (22P) and bodygrond, and between the No. 7 terminal of theVTM-4 control unit connector B (12P) and bodyground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A4 or B7) and the VTM-4relay.

Go to step 15.

(cont’d)

Terminal side of female terminals



Is the VTM-4 relay OK ?

Is there battery voltage?



07/05/09 16:43:54 61SJC020_150_0031

０２

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１５１１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

YES

NO

DTC 51-1, 52-1, 53-1, 53-2, 54-1:

15-3215-32

Rear Differential


PWR (RED/BLU)

VTM-4 CONTROL UNITCONNECTOR B (12P)

FSR (ORN/GRN)

VTM-4 RELAY CONNECTOR (5P)

RED/BLUORN/GRN

VTM-4 CONTROL UNITCONNECTOR A (22P)

LEFT CLUTCH ELECTROMAGNETIC COIL2P CONNECTOR

15. Check for continuity between the No. 4 terminal ofthe VTM-4 control unit connector A (22P) and theNo. 3 terminal of the VTM-4 relay, and between theNo. 7 terminal of the VTM-4 control unit connectorB (12P) and the No. 2 terminal of the VTM-4 relay.

Go to step 16.

Repair open in the wire between the A4 or B7terminals of the VTM-4 control unit and the VTM-4relay.

16. Check for poor connections or loose terminals atthe VTM-4 control unit and the VTM-4 relayconnectors. If the connections are OK, go to step17.


Replace the VTM-4 control unit (see page15-50).






Go to step 4.



5. Disconnect the left clutch electromagnetic coil 2Pconnector on the differential.

6. Measure resistance between the No. 1 and No. 2terminals of the left clutch electromagnetic coil 2Pconnector.

Go to step 7.

Replace the rear differential assembly.

Left ClutchElectromagnetic Coil





Is DTCs 51-1, 52-1, 53-2, and/ or 54-1 indicated?

Is there 1 to 3 ?

07/05/09 16:43:54 61SJC020_150_0032

０２

０３

０４

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

15-33


VTM-4 CONTROL UNIT CONNECTOR B (12P)

LCOL(BLK/WHT)

LCOH(BLK/RED)


LCOL(BLK/WHT)

LCOH(BLK/RED)

7. Measure resistance between the No. 1 terminal ofthe left clutch electromagnetic coil and differentialcarrier assembly.

Go to step 8.


8. Disconnect the VTM-4 control unit connector B(12P).


10. Measure voltage between the No. 1 and No. 2terminals of the VTM-4 control unit connector B(12P) and body ground.

Repair short to power in the wire betweenthe VTM-4 control unit (B1 or B2) and the left clutchelectromagnetic coil.

Go to step 11.


12. Check for continuity between the No. 1 and No. 2terminals of the VTM-4 control unit connector B(12P) and body ground.

Repair short to ground in the wire betweenthe VTM-4 control unit (B1 or B2) and the left clutchelectromagnetic coil.

Go to step 13.

(cont’d)



Wire side of female terminalsIs there about 50 M or more?



07/05/09 16:43:55 61SJC020_150_0033

０３

０４

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１５３２ＦＡＡＴ１０

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

DTC 53-2, 55-1, 56-1, 57-1, 58-1:

15-3415-34

Rear Differential



JUMPER WIRE

BLK/REDBLK/WHT


LCOL(BLK/WHT)

LCOH(BLK/RED)

RIGHT CLUTCH ELECTROMAGNETIC COIL/DIFFERENTIAL OIL TEMPERATURE SENSOR6P CONNECTOR

GRN

BRN

13. Connect a jumper wire between the No. 1 and No. 2terminals of the left clutch electromagnetic coil 2Pconnector.

14. Check for continuity between the No. 1 and No. 2terminals of the VTM-4 control unit connector B(12P).

Do the Rear Differential Function Test(see page 15-48). If the rear differential is normal,replace the VTM-4 control unit (see page 15-50).

Repair open in the wire between the VTM-4control unit (B1 or B2) and the left clutchelectromagnetic coil.





Go to step 4.



5. Disconnect the right clutch electromagnetic coil/differential oil temperature sensor 6P connector onthe differential.

6. Measure resistance between the No. 3 and No. 6terminals of the right clutch electromagnetic coil/differential oil temperature sensor 6P connector.

Go to step 7.


Right ClutchElectromagnetic Coil





Is DTCs 53-2, 55-1, 56-1, 57-1, and/ or 58-1indicated?

Is there 1 to 3 ?

07/05/09 16:43:55 61SJC020_150_0034

０２

０３

０４

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

15-35


GRN


RCOL (GRN)RCOH (BRN)


RCOL (GRN)RCOH (BRN)

7. Measure resistance between the No. 3 terminal ofthe right clutch electromagnetic coil/differential oiltemperature sensor 6P connector and thedifferential carrier assembly.

Go to step 8.


8. Disconnect the VTM-4 control unit connector B(12P).


10. Measure voltage between the No. 3 and No. 4terminals of the VTM-4 control unit connector B(12P) and body ground.

Repair short to power in the wire betweenthe VTM-4 control unit (B3 or B4) and the rightclutch electromagnetic coil.

Go to step 11.


12. Check for continuity between the No. 3 and No. 4terminals of the VTM-4 control unit connector B(12P) and body ground.

Repair short to ground in the wire betweenthe VTM-4 control unit (B3 or B4) and the rightclutch electromagnetic coil.

Go to step 13.

(cont’d)




Is there 50 M or more?



07/05/09 16:43:55 61SJC020_150_0035

０３

０４

－

－

YES

NO

15-36

Rear Differential



JUMPER WIRE

GRN

BRN


RCOL(GRN)

RCOH(BRN)

13. Connect a jumper between the No. 3 and No. 6terminals of the right clutch electromagnetic coil/differential oil temperature sensor 6P connector.

14. Check the for continuity between the No. 3 andNo. 4 terminals of the VTM-4 control unit connectorB (12P).

Do the Rear Differential Function Test(see page 15-48). If the rear differential is normal,replace the VTM-4 control unit (see page 15-50).

Repair open in the wire between the VTM-4control unit (B3 or B4) and the right clutchelectromagnetic coil.


Wire side of female terminalsWire side of female terminals


07/05/09 16:43:56 61SJC020_150_0036

ＳＪＣ８Ａ００Ｋ８０２０００８１５９１ＦＡＡＴ０１ＳＪＣ８Ａ００Ｋ８０２０００８１７３１ＦＡＡＴ０２

－

－

－

－

－

－

－

－

－

－

DTC 59-1: DTC 73-1:

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

15-3715-37

Right/Left Clutch ElectromagneticCoil Power Supply

MAP (Manifold Absolute Pressure)Sensor or PCM





Go to step 4.


4. Check the battery.

Go to step 5.

Replace or charge the battery.

5. Watch the charging system indicator.

Check for poor connections or looseterminals at the VTM-4 control unit connectors. Ifthe connections are OK, replace the VTM-4 controlunit (see page 15-50).

Check the charging system.





Go to step 4.


4. Check for DTCs in the PGM-FI system with the HDS.


Check for poor connections or loose terminalsat the VTM-4 control unit and the PCM connectors.If the connections are OK, replace the VTM-4control unit (see page 15-50).


Is the specif ied battery installed, and is it f ullycharged?

Does the charging system indicator come on withthe ignition switch ON (II), and go of f with theengine started?


Are there any PGM-FI DTCs indicated?

07/05/09 16:43:56 61SJC020_150_0037

０１

ＳＪＣ８Ａ００Ｋ８０２０００８１７６１ＦＡＡＴ０１

－

－

－

－

－

－

－

－

DTC 76-1:

YES

NO

YES

NO

YES

NO

YES

NO

15-38

Rear Differential




Rear Differential Clutch WarningSystem







Go to step 5.



Check the VSA system for DTCs (see page19-39).

Go to step 6.





Go to step 9.



Appropriate wheel Appropriate TerminalLeft-rear A5Right-rear A3

Go to step 18.

Go to step 11.


12. Disconnect the VTM-4 control unit and the VSAmodulator-control unit connectors.

Wire side of female terminalsIs DTC 76-1 indicated?



Is there about 2 to 3 V?

07/05/09 16:43:56 61SJC020_150_0038

０２

０３

０４

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

15-39







RLP (GRY/YEL) RRP (GRY/RED)

13. Check for continuity between the No. 3 and No. 5terminals of VTM-4 control unit connector A (22P)and body ground.


Go to step 14.

14. Connect the No. 3 and No. 5 terminals of VTM-4control unit connector A (22P) to body ground withthe jumper wires.


Appropriatewheel

Appropriate TerminalVTM-4

control unitVSA

modulator-control unit

Right-rear A3 5Left-rear A5 7

Go to step 16.


16. Check for poor connections or loose terminals atthe VTM-4 control unit and the VSA modulator-control unit connectors. If the connections are OK,replace the VTM-4 control unit, then go to step 17.












07/05/09 16:43:56 61SJC020_150_0039

ＳＪＣ８Ａ００Ｋ８０２０００８１７７１ＦＡＡＴ０１ＳＪＣ８Ａ００Ｋ８０２０００８１７８１ＦＡＡＴ０２

－

－

－

－

－

－

－

－

－

－

－

－

DTC 77-1: DTC 78-1:

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

15-4015-40

Rear Differential


PCM VTM-4 Control Unit

NOTE:• Before you troubleshoot, review the general

troubleshooting information (see page 15-4).• Check the fuel and emissions system DTCs. If there is

a DTC, troubleshoot the indicated DTC first, thentroubleshoot DTC 77.




Go to step 4.


4. Update the PCM if it does not have the latestsoftware (see page 11-7), or substitute a known-good PCM (see page 11-8).


Check for loose terminal fit in the VTM-4control unit. If it is normal, replace the VTM-4control unit (see page 15-50).

If the PCM was updated, troubleshooting iscomplete. If the PCM was substituted, replace theoriginal PCM (see page 11-205).





Go to step 4.


4. Check the battery.

Go to step 5.

Replace or charge the battery.

5. Watch the charging system indicator.

Go to step 6.

Check the charging system.

6. Check for installation of any aftermarket CB or Hamradios which may cause an RF signal interference.

Disconnect the aftermarket radio, andretest.

Check for poor connections or loose terminalsat the VTM-4 control unit connectors. If theconnections are OK, replace the VTM-4 control unit(see page 15-50).




Is the specif ied battery installed, and is it f ullycharged?

Does the charging system indicator come on withthe ignition switch ON (II), and go of f with theengine started?

Is there an af termarket radio installed?

07/05/09 16:43:57 61SJC020_150_0040

０１

０２

ＳＪＣ８Ａ００Ｅ４４３８１００００００ＦＡＡＴ０２

－

－

－

－

－

－

－

－

－

－

The VTM-4 indicator comes on, but no DTCsare stored in any system: VTM-4, VSA, orPCM

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

15-41

Symptom Troubleshooting


IG 1 (YEL)

LG (BLK)

LG (BLK)

B (12P)A (22P)


WARN 1(RED/WHT)

B (12P)A (22P)

WARN 2(RED/WHT)

1. Check the No. 21 (7.5 A) fuse in the driver’s under-dash fuse/relay box.

Go to step 2.

Replace the fuse, and recheck.

2. Reinitialize the VTM-4 control unit, and watch theVTM-4 indicator (see page 15-5).

Go to step 3.



4. Measure voltage between the No. 1 and No. 10terminals of the VTM-4 control unit connector A(22P), and the No. 1 terminal of the VTM-4 controlunit connector A (22P) and the No. 12 terminal ofthe VTM-4 control unit connector B (12P).

Go to step 5.

Repair open in the wire between the VTM-4control unit (A1) and the driver’s under-dash fuse/relay box, or repair open in the wire between theVTM-4 control unit (A10 or B12) and body ground,or check the poor ground (G501).


6. Disconnect the VTM-4 control unit and the gaugecontrol module connectors.

7. Check for continuity between the No. 14 terminal ofthe VTM-4 control unit connector A (22P), and theNo. 11 terminal of the VTM-4 control unit connectorB (12P) to body ground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A14 or B11) and the gaugecontrol module.

Go to step 8.

8. Reconnect the gauge control module connectors.


10. Watch the VTM-4 indicator.

Replace the gauge control module (see page22-263).

Check for poor connections or loose terminalsat the VTM-4 connectors. If the connections are OK,replace the VTM-4 control unit (see page 15-50).



Is the fuse OK ?

Does the VTM-4 indicator come on and stay on?



Does the VTM-4 indicator come on?

07/05/09 16:44:22 61SJC020_150_0041

０１

０２

０３

ＳＪＣ８Ａ００Ｅ４４３８１００００００ＦＡＡＴ０３

－

－

－

－

－

－

The VTM-4 indicator does not come on

YES

NO

YES

NO

YES

NO

15-42

Rear Differential

Symptom Troubleshooting (cont’d)


WARN 1(RED/WHT)

B (12P)A (22P)

WARN 2(RED/WHT)


RED/WHT

JUMPER WIRE

GAUGE CONTROL MODULE CONNECTOR C (20P)


WARN 1(RED/WHT)

B (12P)A (22P)

WARN 2(RED/WHT)

1. Do the gauge control module self-diagnosisfunction (see page 22-244).

Go to step 2.

Go to the gauge control module input test(see page 22-244) and check for an open or short inthe power and ground.

2. Disconnect the VTM-4 control unit connectors A(22P) and B (12P).

3. Connect the No. 14 terminal of the VTM-4 controlunit connector A (22P) and No. 11 terminal of theVTM-4 control unit connector B (12P) to bodyground with jumper wires.


5. Watch the VTM-4 indicator.


Go to step 6.


7. Disconnect gauge control module connector A(30P).

8. Connect the No. 3 terminal of the gauge controlmodule connector C (20P) to body ground with ajumper wire.

9. Check for continuity between the No. 14 terminal ofthe VTM-4 control unit connector A (22P) and bodyground, and the No. 11 terminal of the VTM-4control unit connector B (12P) and body ground.

Substitute a known-good gauge controlmodule and recheck. If the symptom/indicationgoes away with the known-good gauge controlmodule, replace the original gauge control module(see page 22-263).

Repair open in the wire between the gaugecontrol module (C3) and the VTM-4 control unit.




Is the gauge control module OK ?

Does the VTM-4 indicator come on?


07/05/09 16:44:22 61SJC020_150_0042

０３

ＳＪＣ８Ａ００Ｅ４４３８１００００００ＦＡＡＴ０４

－

－

－

－

－

－

－

－

－

－

－

－

The VTM-4 LOCK indicator does not come onwhen the VTM-4 LOCK switch is pressed

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

15-43


LOCKSW (BRN/WHT)

NOTE: The VTM-4 LOCK indicator will only come onwhen the engine is running and the transmission is inR, 1, or 2 before the VTM-4 LOCK switch is pressed.

1. Check the No. 21 (7.5 A) fuse in the driver’s under-dash fuse/relay box.

Go to step 2.

Replace the fuse, and recheck.


3. Watch the VTM-4 LOCK indicator.

Go to step 4.

Go to step 11.

4. Start the engine, and move the shift lever to R, 1,and 2, then watch the VTM-4 LOCK indicator.


Go to step 5.

5. Check for an A/T system DTC.

Troubleshoot the A/T system indicatedDTC.

Go to step 6.


7. Disconnect the VTM-4 control unit connector A(22P).


9. Connect a voltmeter between the A8 terminal of theVTM-4 control unit and body ground.


Go to step 10.

10. Test the VTM-4 LOCK switch (see page 15-49).

Repair open in the wire between the VTM-4LOCK switch and the VTM-4 control unit (see page15-50).

Replace the VTM-4 LOCK switch.

(cont’d)


Is the fuse OK ?

Does the VTM-4 LOCK indicator come on, anddoes it go of f about 4 seconds later?

Does the VTM-4 LOCK indicator come on whenthe VTM-4 LOCK switch is pressed?

Is there a DTC?

Is there battery voltage when the VTM-4 LOCKswitch is pressed?

Is the VTM-4 LOCK switch OK ?

07/05/09 16:44:22 61SJC020_150_0043

０４

＊０１

０２

＊０２

－

－

－

－

－

－

YES

NO

YES

NO

YES

NO

15-44

Rear Differential



LOCKH (YEL/BLK)

JUMPER WIRE

JUMPER WIRE

YEL/BLK

VTM-4 LOCK SWITCH 6P CONNECTOR

LOCKH (YEL/BLK)


YEL





Go to step 13.


14. Remove the VTM-4 LOCK switch.

15. Connect the No. 5 terminal of the VTM-4 LOCKswitch 6P connector to body ground with a jumperwire.

16. Check the continuity between the No. 16 terminalof the VTM-4 control unit connector A (22P) andbody ground.

Go to step 17.

Repair open in the wire between the VTM-4control unit (A16) and the VTM-4 LOCK switch.


18. Measure voltage between the No. 2 terminal of theVTM-4 LOCK switch 6P connector and body ground.

Replace the VTM-4 LOCK indicator bulb.

Repair open in the wire between the No. 2terminal of the VTM-4 LOCK switch 6P connectorand the driver’s under-dash fuse/relay box.





Does the VTM-4 LOCK indicator come on?



07/05/09 16:44:23 61SJC020_150_0044

０３

ＳＪＣ８Ａ００Ｅ４４３８１００００００ＦＡＡＴ０５

－

－

－

－

The VTM-4 LOCK indicator comes on whenthe ignition switch is turned ON (II) and doesnot go off

YES

NO

YES

NO

15-45


LOCKH(YEL/BLK)




Go to step 4.

Check for poor connections or loose terminalsat the VTM-4 control unit connectors. If theconnections are OK, replace the VTM-4 control unit(see page 15-50).


5. Disconnect the VTM-4 LOCK switch 6P connector.

6. Check for continuity between the No. 16 terminal ofthe VTM-4 control unit connector A (22P) and bodyground.

Repair short to ground in the wire betweenthe VTM-4 control unit (A16) and the VTM-4 LOCKswitch.

Replace the VTM-4 LOCK switch (see page15-49).




07/05/09 16:44:23 61SJC020_150_0045

０７

＊０１

０４

＊０２

ＳＪＣ８Ａ００Ｅ４４３８１００００００ＦＡＡＴ０６

－

－

－

－

－

－

The VTM-4 LOCK indicator does not come onfor about 4 seconds when the ignition switchis turned ON (II)

YES

NO

YES

NO

YES

NO

15-46

Rear Differential



LOCKH(YEL/BLK)

JUMPER WIRE

JUMPER WIRE

YEL/BLK


LOCKH (YEL/BLK)


YEL







Go to step 5.


6. Remove the VTM-4 LOCK switch.

7. Connect the No. 5 terminal of the VTM-4 LOCKswitch 6P connector to body ground with a jumperwire.

8. Check for continuity between the No. 16 terminal ofthe VTM-4 conntrol unit connector A (22P) andbody ground.

Go to step 9.

Repair open in the wire between the VTM-4control unit (A16) and the VTM-4 LOCK switch.


10. Measure voltage between the No. 2 terminal of theVTM-4 LOCK switch 6P connector and body ground.

Replace the VTM-4 LOCK indicator bulb.

Repair open in the wire between the No. 2terminal of the VTM-4 LOCK switch 6P connectorand the driver’s under-dash fuse/relay box.








07/05/09 16:44:23 61SJC020_150_0046

０１

ＳＪＣ８Ａ００Ｅ４４３０００１９６３５ＭＤＡＴ００

Fluid capacity:

2.64 L (2.79 US.qt) at fluid change

Recommended fluid:

VTM-4 Differential Fluid (P/N 0822-9003)

15-47

Rear Differential Fluid Inspection and Replacement

A47 N·m(4.8 kgf·m,35 lbf·ft)

D47 N·m(4.8 kgf·m,35 lbf·ft)

B

ABC

1. With the vehicle on level ground, inspect thedifferential fluid with the ignition switch OFF.

2. Remove the oil filler plug (A) and sealing washer(B), then check the condition of the fluid, and makesure the fluid is at the proper level (C).

3. The fluid level must be up to the fill hole. If it isbelow the hole, add the recommended fluid until itruns out, then reinstall the oil filler plug with a newsealing washer.

4. If the differential fluid is dirty, remove the drainplug (D) and sealing washer (B), then drain the fluid.

5. Clean the drain plug, then reinstall with a newwasher, and refill the differential with therecommended fluid to the proper level.

6. Reinstall the oil filler plug with a new washer.

07/05/09 16:44:24 61SJC020_150_0047

ＳＪＣ８Ａ００Ｅ４４３００００００００ＦＥＡＴ００

15-48

Rear Differential

Rear Differential Function Test

NOTE: Before doing the Differential Function Test, the following conditions must be present.• No DTCs detected• Engine is OFF• The VTM-4 control unit must be initialized

1. Connect the HDS to the data link connector (DLC).


3. Make sure the HDS communicates with the VTM-4 control unit. If it doesn’t go to the DLC circuit troubleshooting(see page 11-194).

4. Confirm that the temperature of the differential oil is between 68 °F (20 °C) and 140 °F (60 °C) with the HDS.

5. Turn the ignition switch OFF with the shift lever in P.

6. Raise the vehicle so all four wheels are off the ground, and make sure the vehicle is securely supported (see page1-10).

7. Remove the rear wheels (see page 18-28).

8. Release the parking brake.

9. Turn the iginition switch ON (II).

10. Select MISCELLANEOUS TEST, then select the LEFT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS, andfollow the screen prompts. If the results are NORMAL, the left clutch is OK, go to step 11. If the results areABNORMAL, replace the rear differential.

11. Select MISCELLANEOUS TEST, then select the RIGHT CLUTCH ELECTROMAGNETIC COIL TEST with the HDS,and follow the screen prompts. If the results are NORMAL, the right clutch is OK. If the results are ABNORMAL,replace the rear differential.

07/05/09 16:44:24 61SJC020_150_0048

０１

ＳＪＣ８Ａ００Ｅ４４３８１０１９６３８ＫＢＡＴ０１

０１

＊０１

ＳＪＣ８Ａ００Ｅ４４３８１０６３５２１ＦＨＡＴ０２

15-4915-49

Rear Differential Fluid TemperatureSensor Replacement

VTM-4 LOCK Switch Test/Replacement

6 x 1.0 mm12 N·m (1.2 kgf·m, 8.7 lbf·ft)

A

C18 N·m(1.8 kgf·m, 13 lbf·ft)

D

B

A

B

C

Terminal

Position

Release the switch

1 2 3

Press the switch

4 5

1. Remove the wire harness cover (A), thendisconnect the differential oil temperature sensor2P connector (B).

2. Remove the differential oil temperature sensor (C).

3. Install the differential oil temperature sensor in thereverse order of removal, with a new O-ring (D).

1. Remove the instrument panel (see page 20-81).

2. Disconnect the 5P connector (A) from the VTM-4LOCK switch (B), then remove the VTM-4 LOCKswitch.

3. Check for continuity between the terminals in eachswitch position according to the table.

4. If the continuity check is not as specified, replacethe bulbs (C) or the VTM-4 LOCK switch.

07/05/09 16:44:24 61SJC020_150_0049

０１

ＳＪＣ８Ａ００Ｅ４４３８１０６３５０１ＫＢＡＴ０１

０１

０２

ＳＪＣ８Ａ００Ｅ４４３８１０６３５３１ＫＢＡＴ０２

15-5015-50

Rear Differential

VTM-4 Control Unit Replacement VTM-4 Relay Replacement

B

A12 N·m(1.2 kgf·m, 8.7 lbf·ft)

A

BC

D

A

NOTE: The VTM-4 control unit must be initialized(see page 15-5) after replacement, otherwise the 4WDsystem will not function.

1.

2. Remove the three bolts (A) from the VTM-4 controlunit (B).

3. Disconnect the VTM-4 control unit connectors.

4. Install the VTM-4 control unit in the reverse order ofremoval.

1. Remove the instrument side panel (A) and thescrew (B).

2. Remove the instrument under panel (C) and theconnectors (D).

3. Remove the VTM-4 relay (A).

4. Install the VTM-4 relay in the reverse order ofremoval.

07/05/09 16:44:25 61SJC020_150_0050

Remove the right side kick panel (see page 20-60).

０１

ＳＪＣ８Ａ００Ｅ４４３０００１９５９５ＫＢＡＴ００

15-51

Rear Differential Breather, Line, and Hose Replacement

110 mm (4.33 in.)

WHITE MARK

A

B

C

D

E

F

1. Remove the left side bed panel (see page 20-162).

2. Remove the bed floor panel (see page 20-163).

3. Remove the breather (A) and the line (C), then remove the hoses (B, D, F).

4. Connect and install the breather (A) and the hose (B).

5. Clamp the line (C) into place, then connect it to the upper hose (B).

6. Connect the breather joint (E) to the line (C) with the short hose (D).

7. Connect the joint to the lower hose (F), then connect the hose to the differential.

8. Make sure that all the hoses are properly routed, clipped into place, and not pinched.

07/05/09 16:44:25 61SJC020_150_0051

０１

ＳＪＣ８Ａ００Ｅ４４３０００１９６２５ＫＢＡＴ００

15-52

Rear Differential

Rear Differential Mount Replacement

REAR DIFFERENTIALMOUNT B RUBBERINSULATER

REAR DIFFERENTIALMOUNT C RUBBERINSULATER

REAR SUBFRAME

Press.

Press.

07/05/09 16:44:25 61SJC020_150_0052

＊０１

ＳＪＣ８Ａ００Ｅ４４３００００００００ＫＡＡＴ００

Exploded View

15-53

Rear Differential Removal

A: 27 N·m (2.8 kgf·m, 20 lbf·ft)B: 12 N·m (1.2 kgf·m, 8.7 lbf·ft)

REAR DIFFERENTIAL CARRIERASSEMBLY

REAR DIFFERENTIAL MOUNT ARUBBER INSULATER

SET RING

THRUST WASHER

HALF SHAFT OUTER SEAL

REAR DIFFERENTIAL HARNESSBRACKET A

REAR DIFFERENTIAL CABLEBRACKET C

REAR DIFFERENTIAL CABLEBRACKET F

DIFFERENTIAL OIL TEMPERATURESENSOR

SEALING WASHER

DRAIN PLUG47 N·m (4.8 kgf·m, 35 lbf·ft)

REAR DIFFERENTIAL HARNESSBRACKET B

B

A

B

B

A

A

A

A

O-RING

FILLER PLUG47 N·m (4.8 kgf·m, 35 lbf·ft)

(cont’d)

Replace.

Replace.

Replace.

Replace.

Replace.

07/05/09 16:44:26 61SJC020_150_0053

０２

０３

Special Tools Required

15-54

Rear Differential

Rear Differential Removal (cont’d)

A

BC

D

E

D

D

A

Driveshaft remover 07AAD-S9VA000

1. Drain the differential fluid (see page 15-47).

2. Make a reference mark across the propeller shaft,the transfer, and the rear differential, then removethe propeller shaft (see page 16-40).

3. Remove the rear driveshaft (see page 16-24).

4. Place a transmission jack under the rear differential(A).

5. Disconnect the 6P (B) and 2P (C) connectors, thenremove the mounting bolts (D) and washer (E).

6. Lower the rear differential a little on thetransmission jack.

7. Disconnect the breather hose (B) from the reardifferential.

8. Lower the rear differential on the transmission jack.

07/05/09 16:44:26 61SJC020_150_0054

０１

ＳＪＣ８Ａ００Ｅ４４３００００００００ＭＡＡＴ００

－－Standard: 1.23 2.38 mm (0.048 0.094 in.)

15-55

Backlash Inspection

A

B

C

Connecting battery voltage to either the right or leftclutch electromagnetic coils for more than3 minutes will damage the rear differential.

1. Install the left rear driveshaft, then connect thebattery power to the No. 1 terminal of the left clutchelectromagnetic coil 2P connector (A) and groundto the No. 2 terminal.

2. Check the backlash of the companion flange (B)with a dial indicator (C).

3. If the backlash is out of standard, replace the reardifferential.

07/05/09 16:44:27 61SJC020_150_0055

０１

０２

０３

ＳＪＣ８Ａ００Ｅ４４３００００００００ＫＣＡＴ００

15-56

Rear Differential

Rear Differential Installation

A

A14 x 1.5 mm85 N·m (8.7 kgf·m, 63 lbf·ft)

A10 x 1.25 mm55 N·m (5.6 kgf·m, 41 lbf·ft)

A14 x 1.5 mm85 N·m(8.7 kgf·m,63 lbf·ft)

B

CD

AB

CYellow reference marks

1. Raise the rear differential a little on thetransmission jack, then connect the breather tube(A) to the rear differential.

2. Raise the rear differential to the mounting level,then install the mounting bolts (A) and washer (B).

3. Connect the 6P (C) and 2P (D) connectors.

4. Install the rear driveshaft (see page 16-36).

5. Install the new rear differential (A) onto thepropeller shaft (B), by aligning the reference mark(C). Make sure you use new mounting bolts.

6. Attach the propeller shaft to the transfer and therear differential by aligning the reference marks(see page 16-41).

7. Refill the differential with recommended fluid(see page 15-47).

07/05/09 16:44:27 61SJC020_150_0056

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