Mitsubishi Outlander GS45X. Manual - part 1180

DIAGNOSIS

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WIRELESS CONTROL MODULE (WCM)

42C-87

TECHNICAL DESCRIPTION (COMMENT)

If the WCM does not work at all or if the WCM cannot
communicate with the scan tool, the WCM power
supply or the ground circuit may be defective.

TROUBLESHOOTING HINTS

• Damaged wiring harness and connectors

• Malfunction of the WCM

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

STEP 1. Check WCM connector C-29 and ETACS-ECU
connector C-317 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Is the WCM connector C-29 and ETACS-ECU connector

C-317 in good condition?
YES : Go to Step 2.
NO : Repair the defective connector.

AC702145 AI

Connector: C-29

AC701632 AI

Connectors: C-307, C-309, C-317

C-307 (B)

C-309 (B)

C-317

DIAGNOSIS

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WIRELESS CONTROL MODULE (WCM)

42C-88

STEP 2. Check the wiring harness between WCM
connector C-29 (terminal No.6, 9) and the ETACS-ECU
connector C-317 (terminal No.10, 5) for open circuit.
(1) Disconnect WCM connector C-29 and ETACS-ECU

connector C-317, and check the wiring harness.

(2) Check the wiring harness between WCM connector C-29

(terminal No.6) and ETACS-ECU connector C-317 (terminal
No.10)

OK: Continuity exists (2

Ω or less)

(3) Check the wiring harness between WCM connector C-29

(terminal No.9) and ETACS-ECU connector C-317 (terminal
No.5)

OK: Continuity exists (2

Ω or less)

Q: Is the wiring harness between WCM connector C-29 and

the ETACS-ECU connector C-317 in good condition?
YES : Go to Step 3.
NO : Repair the wiring harness between WCM connector

C-07 (terminal No.6, 9) and ETACS-ECU connector
C-317 (terminal No.10, 5).

STEP 3. Check the wiring harness between the WCM
connector C-29 (terminal No.7) and the ground for open
circuit.
(1) Disconnect the connector and measure the resistance at

the wiring harness side.

(2) Turn the ignition switch to the ON position.
(3) Measure the resistance between terminal No.7 and the

ground.

OK: Continuity exists (2

Ω or less)

Q: Is the wiring harness between WCM connector C-29 and

the ground in good condition?
YES : Go to Step 4.
NO : Repair the wiring harness between WCM connector

C-29 (terminal No.7) and ground.

AC709707EQ

Harness side: C-07

Harness side: C-317

AC709707ER

Harness side: C-07

Harness side: C-317

AC608812ED

Harness side: C-29

DIAGNOSIS

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WIRELESS CONTROL MODULE (WCM)

42C-89

STEP 4. Retest the system
Q: Does the abnormality in WCM power supply and ground

circuits in good condition?
YES : The trouble can be an intermittent malfunction (Refer

to GROUP 00, How to use
Troubleshooting/inspection Service Points - How to
Cope with Intermittent Malfunction

P.00-15

NO : Replace WCM and register the ID codes (Refer to

P.42C-10

Inspection Procedure 5: Keyless entry system does not work.

CAUTION

Before replacing the ECU, ensure that the power supply
circuit, the ground circuit and the communication circuit
are normal.

OPERATION

The lock/unlock signals from the transmitter are received by
WCM, and then sent to ETACS-ECU from WCM. When
ETACS-ECU receives signals from the key reminder switch
and all the door switches, ETACS-ECU actuates the keyless
entry system.

PROBABLE CAUSES

• Malfunction of the key reminder switch

• Malfunction of the door switches

• Malfunction of keyless entry transmitter

• Malfunction of the WCM

• Malfunction of ETACS-ECU

• Damaged wiring harness and connectors

• Option coding information

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics
Use scan tool MB991958 (M.U.T.-III), diagnose the CAN bus
lines.
Q: Is the CAN bus normal?

YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C, CAN

bus diagnostics chart

P.54C-17

DIAGNOSIS

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WIRELESS CONTROL MODULE (WCM)

42C-90

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect

scan tool (M.U.T.-III)

P.42C-7

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU. Refer to GROUP 54A,

P.54A-733

NO : Go to Step 3.

STEP 3. Check the power supply system
With the ignition switch in the LOCK (OFF) position, check if
the following function operates normally:

• Headlight

• Hazard warning light

Q: Is the check result normal?

YES : Go to Step 4.
NO : Refer to GROUP 54A, Malfunction of ETACS-ECU

power supply circuit

P.54A-783

STEP 4. Verify the central door locking system.
Q: Does the central door locking system work normally?

YES : Go to Step 5.
NO : Refer to GROUP 42A, Trouble Symptom Chart