door locks power and keyless entry system

DOOR LOCKS - POWER & KEYLESS ENTRY SYSTEM

1993 Mitsubishi Diamante

1993 ACCESSORIES & EQUIPMENT Mitsubishi Keyless Entry & Power Door Locks

Diamante

DESCRIPTION & OPERATION

On Diamante, power door locks are controlled by driver orfront passenger switches which send signals to a Electronic TimerAlarm Control System (ETACS) module. The ETACS module sendsappropriate signals to individual door lock actuators throughindividual relays. The following features are incorporated in power door locksystems that have an ETACS module:

* Once locked door is closed, system will unlock door if key remains in ignition switch. * Continuous switching between lock and unlock of door will disable system for approximately one minute. * Doors automatically lock once vehicle exceeds 12 MPH.

Diamante offers optional keyless entry system. Use of a 2button portable remote control operates door locks within a range of33 ft. (10 m). Dome light flashes twice once doors are locked andilluminates for 3 seconds when doors are unlocked. If after 30 secondsdoor(s) have not been opened when unlocked with keyless entry system,doors will relock. Diamante uses a switch, located on driver’s dash, thatactivates a solenoid which releases the trunk lid. Trunk release canbe disabled with ON/OFF switch located in glove compartment (valetsecurity).

TROUBLE SHOOTING

POWER DOOR LOCK INOPERATIVE

Operate door lock(s) with ignition switch in OFF position. Ifdoor lock(s) do not operate, check for following possible causes:

* Burned fuse, circuit breaker or fusible link caused by short to body ground. * Wire connector or pin inside connector disengaged at any connector or component in system. * Defective ETACS module (if equipped). * Defective door lock switch, relay or actuator. * Subfreezing weather conditions, mechanical failure or corroded or misaligned assemblies.

KEY REMINDER SYSTEM INOPERATIVE

With key inserted in ignition switch, lock driver’s orpassenger’s door and close door. If door locks do not unlock, checkfor following possible causes:

* Defective key reminder switch or no input signal to ETACS module. * Defective front door switch or no input signal to ETACS module.

* Defective vehicle speed sensor or no input signal to ETACS module.

TESTING

NOTE: If after all testing procedures are completed system is not functioning properly, substitute ETACS module with known good unit and retest. ETACS module is located in front of shifter, under console.

INPUT SIGNAL

1) Access data link connector at lower left corner of dash.Connect positive lead of voltmeter to terminal No. 9 and negative leadto terminal No. 12. See Fig. 1. Check if input signals from systemcomponents are being received by ETACS module. 2) Voltmeter needle should sweep when each switch is operated(i.e. headlight switch or pop-up switch). If switch or relatedcomponent is not functioning, voltmeter will not operate when switchis activated. Check related circuit and/or component.

Fig. 1: Data Link Connector Terminal IDCourtesy of Mitsubishi Motor Sales of America.

DOOR LOCK ACTUATOR

1) Access left front or right rear door lock actuator. See

DOOR LOCK ACTUATOR under REMOVAL & INSTALLATION. Disconnect harnessconnector. Set actuator to LOCK position. Connect positive lead of 12-volt power source to terminal No. 1 of actuator. See Fig. 2. Actuatorshould operate to UNLOCK position when terminal No. 3 is connected tonegative lead. 2) With actuator set to UNLOCK position, connect positivelead of 12-volt power source to terminal No. 3 of actuator. SeeFig. 2. Actuator should operate to LOCK position when terminal No. 1is connected to negative lead. 3) Access right front or left rear door lock actuator. SeeDOOR LOCK ACTUATOR under REMOVAL & INSTALLATION. Disconnect harnessconnector. Set actuator to LOCK position. Connect positive lead of 12-volt power source to terminal No. 3 of actuator. See Fig. 2. Actuatorshould operate to UNLOCK position when terminal No. 1 is connected tonegative lead. 4) With actuator set to UNLOCK position, connect positivelead of 12-volt power source to terminal No. 1 of actuator. SeeFig. 2. Actuator should operate to LOCK position when terminal No. 3is connected to negative lead. 5) On left or right door lock actuator, there should becontinuity between terminals No. 2 and 4 when actuator is in UNLOCKposition. There should be no continuity in LOCK position. Replaceactuator if it fails any preceding tests.

Fig. 2: Identifying Actuator ConnectorsCourtesy of Mitsubishi Motor Sales of America.

DOOR LOCK POWER RELAY

NOTE: Following testing applies to door lock power relay "2" for keyless entry systems.

Check continuity of relay using following chart. See Fig. 3.Replace relay as needed. For relay location, see Fig. 4.

Fig. 3: Testing Door Lock Power RelayCourtesy of Mitsubishi Motor Sales of America.

Fig. 4: Locating Door Lock RelaysCourtesy of Mitsubishi Motor Sales of America.

KEYLESS CONTROL UNIT

NOTE: If after all testing procedures are completed system is not functioning properly, substitute keyless control unit with known good unit and retest.

Disconnect keyless control unit harness connector. Controlunit is located under rear shelf, accessed through trunk. Using DVOM,measure voltage between selected terminal and vehicle ground. SeeINSPECTING KEYLESS CONTROL UNIT VOLTAGE table. See Fig. 5. If voltageis not within specification, inspect and repair circuit as needed. Seeappropriate chassis wiring diagram in the WIRING DIAGRAMS section.

Fig. 5: Identifying Control Unit ConnectorCourtesy of Mitsubishi Motor Sales of America.

INSPECTING KEYLESS CONTROL UNIT VOLTAGE TABLE�� Terminal No.

�

�

�� (Wire Color)

� Function/Description

� Terminal Voltage

�� 1 (Green)

� Key Reminder Switch

� Battery Voltage With

��

�

� Key Installed/0 Volts

��

�

� With Key Removed

�� 2 (Green/Red)

� Door Switch

�0 Volts With Door Open/

��

�

� 12 Volts With Door

��

�

� Closed

�� 6 (Red/White)

�Door Lock Actuator (L.H.)

� Lock-5 Volts (Pulse

��

�

� Output) (1)/

��

�

� Unlock-0 Volts

�� 9 (Blue)

� Control Unit Power


��

� Supply (Switched)

� Ignition Switch In

��

�

� ACC Position

�� 10 (Red/Black)

� Control Unit Power

� Battery Voltage

��

� Supply (Constant)

�

�� 11 (Green/Orange)

� Dome Light

� 0 Volts With All Doors

��

�

� Closed, Dome Light

��

�

� Switch Off Or On/

��

�


��

�

� Dome Light Switch In

��

�

� Door Position (2)

�� 12 (Red/Blue)

� Door Lock Output (All

�0 Volts While Actuated/

��

� Doors)

� Battery Voltage While

��

�

� Not Actuated

�� 13 (Red/Black)

� Door Unlock Output


��

� (All Doors)


��

�

� Not Actuated

�� 14 (Brown/Red)

� Door Unlock Output


��

� (Driver’s Door)


��

�

� Not Actuated

�

� �� 18 (Red/Black)

� Trunk Lock Relay

�0 Volts With Relay Off/

��

�


��

�

� Relay On

�� 20 (Black)

� Ground

� 0 Volts

�� (1) - Voltage measured using an oscilloscope.

�� (2) - Door position indicated on switch by Black dot (*).

��

POWER DOOR LOCK CONTROL UNIT

1) Turn ignition on. Using DVOM, backprobe terminal No. 1(Blue wire) of left control unit. See Fig. 5. If voltage measuredbetween terminal No. 1 and ground is battery voltage, go to next step.If voltage is not within specification, go to step 3). 2) Disconnect left control unit harness connector and measurevoltage between harness connector terminal No. 1 and ground. Ifvoltage is less than battery voltage, inspect and repair circuitbetween ETACS harness connector terminal No. 52 (Blue wire) and leftcontrol unit harness connector terminal No. 1. If battery voltageexists, replace left control unit. 3) Disconnect ETACS harness connector. See ETACS MODULELOCATION table. Disconnect both left and right front door control unitharness connectors. Using ohmmeter, check for continuity betweenterminal No. 1 of left control unit and vehicle ground. If continuityexists, inspect and repair short to ground. If continuity does notexist, go to next step. 4) Connect ETACS harness connector. Using DVOM, measurevoltage between left control unit harness connector terminal No. 1 andground. If battery voltage does not exist, replace ETACS module andretest. If battery voltage exists, go to next step. 5) Connect right door control unit harness connector. UsingDVOM, measure voltage between left control unit harness connectorterminal No. 1 and ground. If battery voltage does not exist, replaceright control unit and retest. If battery voltage exists, replace leftcontrol unit and retest.

TRUNK RELEASE SOLENOID & SWITCH (DIAMANTE)

1) Remove trunk release main switch from glove compartment.Disconnect harness connector. Using ohmmeter, check for continuityacross switch terminals when switch is in ON position. Replace asneeded. 2) Remove trunk release opener switch from lower driver’sdash. Disconnect harness connector. Using ohmmeter, check forcontinuity across switch terminals when switch is depressed. Replaceswitch as needed. 3) Open trunk lid. Disconnect trunk release solenoid harnessconnector. Remove solenoid if needed. Connect positive lead of 12-voltpower source to solenoid connector. Solenoid should operate whennegative lead contacts solenoid housing. Replace switch as needed.

REMOVAL & INSTALLATION

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle.

DOOR LOCK ACTUATOR

All Except Rear Door Or Hatch Remove inner door panel. Remove delta cover (access to mirrormounting). Remove door light, switch panel and armrest. Removemounting screws and slide panel up to remove. Remove waterproof film.Remove actuator. To install, reverse removal procedure.

Rear Door Or Hatch Remove door pull handle. Remove window trim. Remove doorrelease handle trim. Remove tool kit (if equipped). Remove door paneland waterproof film. Remove actuator solenoid. To install, reverseremoval procedure.

WIRING DIAGRAMS

See appropriate chassis wiring diagram in the WIRING DIAGRAMSsection.

door locks power and keyless entry system

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