ecm c18

8/9/2019 ECM C18

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INTERACTIVE SCHEMATIC

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Cover Page

Information

Schematic

Machine Views

Component Table

Tap Table

Fluid Power Symbols

Electrical Symbols

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Rear Frame

Tap Views

Features

Options

Bookmarks X

EC-C3

EC-C2 E-C60

EC-C1

E-C61

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8/9/2019 ECM C18


Electrical System633E Series II Wheel Tractor - Scraper 631E Series II Wheel Tractor - Scraper

Tractor:

1AB1640-UP

1NB1390-UP2PS1-UP

631E Scraper:

1BB1540-UP

6PC1210-UP

633E Scraper:

1EB310-UP

2011 Caterpillar, All Rights Reserved Printed in U.S.A©

SENR9056-0July 201

8/9/2019 ECM C18


COMPONENT LOCATION

Component Schematic

Location

Machine

Location Component

Schematic

Location

Machine

Location

Alarm (Sc) - Action D-6 A Solenoid (Tr) - Start Aid A-5 23

Alarm (Sc) - Action (Master) D-6 A Solenoid (Tr) - Upshift A-7 11

Alarm (Tr) - Action D-6 A Solenoid - Air Conditioner Clutch B-5 21

Alarm - Backup C-12 19 Solenoid - Apron E-10 34

Alternator (Tr) B-5 21 Solenoid - Auger Forward A-8 35

Battery (Tr) A-6 23 Solenoid - Auger Reverse A-8 35

Breaker (Tr) - Alternator (80 AMP) E-8 D Solenoid - Bail B-7 11

Breaker (Tr) - Key (10 AMP) E-8 D Solenoid - Cushion Hitch B-8 36

Breaker - Blower Motor (15 AMP) E-7 D Solenoid - Cylinder Head (1,3,5,7) F-3 15

Breaker - Engine Control (15AMP) E-7 D Solenoid - Cylinder Head (2,4,6,8) E-3 15

Breaker - Head Lamp (15 AMP) E-7 D Solenoid - Differential Lock E-11 C

Breaker - Panel Dome, Stop and Tail Lamp (10 AMP) E-7 D Solenoid - Forward Horn E-11 C

Control - Engine ECM C-3 24 Starter (Tr) B-6 37

Control - EPTC II F-12 6 Switch (Tr) - Conv Retr A-6 38

Control - Interface Relay (Auger) D-10 C Switch (Tr) - Disconnect A-6 23

Control - Interface Relay (Bail) F-9 C Switch (Tr) - Key Start E-7 B

Control - Interface Relay (Cush) F-9 C Switch (Tr) - Operator Monitor Test D-6 A

Control - Interface Relay (Elev) C-11 C Switch (Tr) - Start Aid F-7 A

Control - Stop/Tail Lamp B-11 25 Switch (Tr) - Transmission A-7 A

Dryer - Air A-5 26 Switch - Air E-11 A

Flasher F-8 C Switch - Apron F-11 BFuses D-7 D Switch - Auger Forward E-10 B

Gauge (Tr) - Conv Retr Temp D-9 B Switch - Auger Reverse A-8 B

Gauge (Tr) - CoolantTemperature D-9 B Switch - Backup Alarm F-9 B

Gauge - Air Pressure D-9 B Switch - Bail F-11 A

Horn - Overspeed C-8 A Switch - Blower E-6 B

Indicator Assembly C-4 A Switch - Brake Service D-12 A

Lamp (Sc) - Action (Master) E-6 A Switch - Charge Pump Filter A-7 35

Lamp (Tr) - Action (Master) E-6 A Switch - Coolant Filter Indicator A-8 35

Meter (Tr) - Service E-9 D Switch - CoolantFlow F-1 40

Monitor (Tr) - Operator E-6 A Switch - Cushion Hitch F-11 A

Motor - Blower F-4 C Switch - Differential Lock E-11 40

Motor - Blower F-5 C Switch - Dome Lamp F-8 A

Motor - Fuel Pump C-9 27 Switch - Door Dome Lamp F-7 A

Motor - Washer Front D-11 21 Switch - Engine Diagnostics D-4 A

Motor - Washer Rear D-11 21 Switch - Engine Oil B-5 24

Motor - Wiper Front F-5 C Switch - Engine Oil (Cush/Bail) B-5 31

Motor - Wiper Rear F-8 C Switch - Flood Lamp E-6 A

Radio - Power E-6 C Switch - Ground Level Shutdown A-5 42

Receptacle (Tr) - Aux Start A-6 23 Switch - Head Lamp Dimmer E-12 C

Relay - Main E-8 6 Switch - Hold F-11 B

Relay - Overspeed F-10 A Switch - Horn Forward F-7 A

Relay - Start Aid E-9 C Switch - Motor Case Drain Filter A-8 B

Relay - Test Switch F-10 A Switch - Neutral/Run F-7 B

Relay (Tr) - Start E-8 6 Switch - Overspeed Test E-9 B

Resistor - Blower Speed E-4 C Switch - Panel Dimmer F-6 A

Resistor - Panel Dimmer F-6 A Switch - Parking Brake A-7 B

Resistor - Starter Diagnostic Connector B-6 C Switch - Pump Case Drain Filter A-7 35

Sender - Coolant B-6 24 Switch - Refrigerant E-4 43

Sender (Tr) - Conv Retr B-6 29 Switch - Retarder Brake D-12 B

Sensor - Atmospheric Pressure E-2 24 Switch - R unning Lamp F-6 A

Sensor - Backup Cam S/T F-2 24 Switch - Service Clear D-12 6Sensor - Coolant Temperature F-2 24 Switch - Service Set D-12 6

Sensor - Elevator Position Handle C-11 C Switch - Shift Lever E-9 B

Sensor - Engine Oil Pressure E-2 24 Switch - Side Flood Lamp F-7 A

Sensor - Engine Oil Temperature E-2 24 Switch - Slip Limiter E-10 B

Sensor - Fuel Temperature E-2 24 Switch - Steering A-7 32

Sensor - Primary Cam S/T F-2 24 Switch - Stop Lamp E-11 C

Sensor - Rail Pressure F-2 24 Switch - Thermostat E-4 B

Sensor - Tach A-6 30 Switch - Throttle Lock D-4 B

Sensor - Throttle Lock Brake Pressure B-6 31 Switch - Turn Signal F-8 A

Sensor - Throttle Position C-6 C Switch - Wiper Front F-5 A

Sensor - Transmission Speed A-8 32 Switch - Wiper Rear F-5 A

Sensor - TurboOutlet Pressure F-2 24 Tachometer D-5 A

Solenoid (Tr) - Downshift A-7 11 Valve - Rail Pressure Control F-2 15

Machine locations are repeated for components located close together.

(Sc) = Scraper B Located in the lefthand console.

(Tr) = Tractor C Located in the righthand console. A Located in the cab. D Located on or near relay panel.

8/9/2019 ECM C18


CONNECTOR LOCATION

Connector Number Schematic

Location

Machine

Location

CONN 1 F-11 38

CONN 2 D-11 6

CONN 3 B-10 5

CONN 4 A-11 4

CONN 5 B-10 5

CONN 6 B-10 7

CONN 7 B-10 8

CONN 8 C-10 8

CONN 9 E-10 6

CONN 10 E-10 6

CONN 11 F-10 A

CONN 12 A-8 11

CONN 13 B-8 10

CONN 14 B-8 11

CONN 15 B-8 9

CONN 16 C-8 13

CONN 17 E-8 6

CONN 18 E-7 6

CONN 19 C-7 13

CONN 20 B-7 11

CONN 21 B-7 11

CONN 22 C-6 12

CONN 23 C-6 14

CONN 24 C-6 13

CONN 25 C-5 13

CONN 26 C-5 14

CONN 27 B-5 17

CONN 28 B-4 18

CONN 29 D-4 16

CONN 30 D-4 16

CONN 31 E-4 6

CONN 32 B-2 15

CONN 33 E-1 15

CONN 34 F-1 15

CONN 35 F-1 15

CONN 36 B-5 43

CONN 37 C-12 19CONN 38 D-9 6

CONN 39 F-8 A

CONN 40 F-7 A

CONN 41 B-6 38

CONN 42 A-7 35

CONN 43 A-7 35

CONN 44 D-9 C

CONN 45 B-8 35

CONN 46 F-7 13

The connectors shown in this chart are for harness to harness connectors.Connectors that join a harness to a component are generally located at or near

the component. See the Component Location Chart.

8/9/2019 ECM C18


CID / MID / FMI

Co mponent identifiers (CID¹) and Module Identifier (MID²)

EP TC-II Trans mis s ion Contro l (MID No. 027)

C ID Component

0168 E lectrical S ystem Voltage

0 19 0 E n gine S p ee d

0 24 8 CA T Data L ink0269 Sensor Power Supply

0571 Forward E levator S olenoid

0572 R everse E levator S olenoid

0575 Elevator Lever Sensor

0627 S econdary Brake Pressure S witch

0 65 0 H arne ss C ode

0700 Transmission Gear Switch

0701 Transmission Output S peed S ensor

0702 Shift Lever Switch

0 70 4 S e r vice B r ake P r ess ure S witch

0707 Up Shift Solenoid

0708 Down Shift S olenoid

0 70 9 L ockup S o le noid

0773 Hoist Lever Position S ensor

HE UI ADE M II E CM (MID No. 036)

CID Component

0001 C ylinder 1 Injector S olenoid

0002 Cylinder 2 Injector S olenoid







0042 R ail Control Valve

0091 Throttle Position

0100 Engine Oil Pressure0110 E ngine Coolant Temperature

0 16 4 R a il P re ss ure

0168 E lectrical S ystem Voltage

0174 Fuel Temperature

0175 E ngine Oil Temperature

0190 E ngine S peed/Timing S ensor

0248 CAT Data Link Communications

0253 Personality Module Mismatch

0254 Internal EC M Failure

0261 E ngine Timing C alibration

0262 Analog Sensor Power S upply

0263 Digital S ensor Power S upply

0267 E ngine S hutdown

0268 Programmable Parameter Fault

0273 Turbo Outlet Pressur e

0274 Atmospheric Pressure

0 28 1 E ngine L a mp

0282 E ngine Overspeed Circuit

0 28 4 E M S E n gine O n

0285 EMS Engine Coolant Lamp

0286 EMS Low Engine Oil Pressure Lamp

0342 S econdary E ngine S peed/Timing Sensor

0 54 5 S tart A id Re l ay

0549 Throttle Lock S witch

0561 R ear E ngine Throttle Lock S olenoid

0 60 1 B r ake A ir P r essu re

0799 E lectronic S ervice Tool S oftware Update

¹ T he C ID is a diagnostic code that indicates which component is

faulty.

² T he MID is a diagnos tic code that indicateswhich elec tronic

control module diagnose d the fault.

Failur e Mode Identifiers (FMI)¹

FMI No. Fai lure Des cr iption

0 Data valid but above normal operational range.

1 Data valid but below normal operational range.

2 Data erratic, intermittent, or incorrect.

3 Voltage above normal or shorted high.4 Voltage below normal or shorted low.

5 Current below normal or open circuit.

6 C urrent above normal or grounded circuit.

7 Mechanical sys tem not responding properly.

8 Abnormal frequency, pulse width, or period.

9 Abnormal update.

10 Abnormal rate of change.

11 Fa ilure mode not identifiable.

12 Bad device or component.

13 Out of calibration.

14 Parameter failures.


16 Parameter not available.

17 Module not responding.

18 Sensor supply fault.

19 Condition not met.


¹The FMI is a diagnostic code that indicates what type of failure

has occurred.

8/9/2019 ECM C18


SPECIFICATIONS AND RELATED MANUALS

Res is tor , Sender and Solenoid Speci f icat ions

Par t No. Component Des c r iption R es is tanc e (Ohms )¹

3T -3123 R es is tor: P anel Dimmer 25.0 ± 0.25

6T -2217 R es is tor: S tarter, Diagnos tic 150.0 ± 7.5

9 G-1 95 0 R e s is tor: B lowe r Motor S pe ed Over-all: 2.0 ± 0.1

Tap: 1.00 ±0.05

3E -9257 S ender: C onverter S ender (T r) 33.7 ± 1.0 @ 25.5 ± 5°C

6N-5926 S ender: C oolant 5806-7246 @ 54.4°C524-586 @ 115.6°C

3E -1906 S olenoid: A/C C lutch 17.6 ± 0.6

3E -5206 S olenoid: B ail 34.2

7N-7259 S olenoid: S tart Aid 6.0

7T -9074 S olenoid: F orward Horn 55.0 ± 6.0

8T -8692 S olenoid: C us hion Hitch 34.2

9X-9482 S olenoid:

Apron

Differential Lock

S lip Limiter

Throttle Lock

68.0

105-1500 S olenoid: Injectors 1.55 ± 0.20

144-6292 S olenoid:Down S hift

Up S hift 32.6 ± 1.6

¹ At room temperature unles s otherwise noted.

Off Machine Switc h Speci f ic at ion

Par t No . Func tion A c tuate Deac tuate Contac t Pos i tion

2M-9346 Stop Lamp Pressure 45.0 kP a MAX 5 kP a MIN Normally Open

(6. 5 ps i MAX ) (0. 5 ps i MIN)

3E-2033 Secondary Brake Air Pressure (Trans) 640 kP a 530 ± 40 kP a Normally O pen

(92.0 ps i) (77.0 ± 6 .0 ps i)

3 E - 20 34 B r a ke S e r vic e 80 kP a MAX 55 ± 20 kP a Normally C los ed

(11. 6 ps i MAX ) (8. 0 ± 2 .9 ps i)

3E-6428 Coolant Flow (CMS) 362 ± 29 mN 303 mN MIN Normally O pen

49.8 mm ID P oint

(1.3 ± 0.1 oz (1.1 oz MIN)(2.0 in ID Point)

7N-9560 Converter/R etarder Temp (EMS ) 129.0 ± 3.0°C 118.0°C MIN Normally C los ed

(265 ± 5 °F ) (245.0° F MIN)

8C-3569 E ngine Coolant Temp (Start Aid) 37.8 ± 2.8°C 26.7°C MIN Normally C los ed

(100 ± 5°F ) (80°F MIN)

8 T -9 79 2 P a r k B r ak eP r es s u re ( E M S ) 5 17 .0 ± 3 5. 0 kP a 4 48 .0 ± 3 5. 0 kP a 1 -2 N orma lly O pe n

( 75 .0 ± 5 . 0 ps i ( 65. 0 ± 5 .0 ps i) 1 -3 N orma lly C los ed

9D-6888 A/C Low Pressure 234 kP a MAX 152 kP a MIN Normally Open

(34 ps i MAX ) (22 ps i MIN)

9X-5445 R efrigerant Thermostat -1.1 ± 0.8°C 2.2 ± 0.8°C Normally Open

(30 ± 1.4°F ) (36 ± 1.4°F )

101-5459 Engine Oil Pressure 90.0 kP a MAX 70. 0 ± 2 0.0 kP a Normally O pen

( 13. 0 ps i MA X) ( 10 .0 ± 3 . 0 ps i)

107-0612 Engine Oil Pressure 93. 0 ± 2 1.0 kP a 70.0 ± 21. 0 kP a Norma lly O pen( 13 .5 ± 3 . 0ps i) ( 10 .0 ± 3 . 0 ps i)

109-0620 Pump Cas e Drain Filter S witch 124 ± 14 kP a 82 kP a MIN Normally C los ed

18 ± 2 ps i 12 ps i MIN

109-4215 Steering Flow 4 grams 1.5 grams Normally Open

(0.14 oz) (0.05 oz)

Related Electr ical Service Manuals

Ti tle For m Number

Alterna tor ( T r): 100 -50 47 S E NR 20 82

E le ctronic Monitoring S ys te m S E N R 2945

E ngine C ontrol S E NR 1037

S ta rting a nd C ha rging S ys tems S E N R 2947

S ta rting Motor (T r): 6V -0890 S E NR 3860

T ra ns mis s ion C o ntrol ( T r) : 3 E -9 23 3 S E N R 9 12 2

8/9/2019 ECM C18


HARNESS and WIREElectrical Schematic Symbols

1

2

AG-C4

111-7898

L-C12

3E-5179

9X-1123Component

Part Number

Pin or Socket Number

Part Number: for

Connector Receptacle

Part Number: for

Connector Plug

Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)

Plug

325-AG135 PK-14

Wire Co

Wire Ga

Receptacle

PressureSymbol

T

TemperatureSymbol

LevelSymbol

FlowSymbol

Circuit Breaker Symbol

Harness and Wire Symbols

1

1

2

2

Sure-Seal c onnector: Typical representationof a Sure-Seal connector. The plug and receptacle

contain both pins and sockets.

Deutsch connector: Typical representation

of a Deutsch connector. The plug contains allsockets and the receptacle contains all pins.

Symbols

Symbols and Definitions

Fuse (5 Amps)

5A

T

Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it.

Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component ha

screw terminals and a wire can be disconnected from it.

Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be

disconnected from the component.

Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to th

machine.

Reed Switch : A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch;

opens the contacts of a normally closed reed switch.

Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. It

resistance changes to give an indication to the gauge of the temperature or pressure.

Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagne

when current flows through it. The electromagnet can open or close the switch part of the relay.

Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when curren

flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by

permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an

internal switch that places the latch coil circuit open at the time the coil latches.

Harness id entification code:

This example indicates wire group 325,

wire 135 in harness "AG".

L-C123E-5179

Wire, Cable, or Harness Assembly Identification:

Includes Harness Identification Letters and Harness

Connector Serialization Codes (see sample).Harness Connector Serialization Code: The "C" stands

"Connector" and the number indicates which connector in

harness (C1, C2, C3, ...).

8/9/2019 ECM C18


ecm c18

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