Mitsubishi Outlander GS45X. Manual - part 1174

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-63

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.

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 the 

Scan Tool (M.U.T.-III) 

P.42C-7

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-17

).

STEP 2. Using scan tool MB991958, read the occupant 
classification-ECU diagnostic trouble code.
Check if DTC is set to the occupant classification-ECU.
Q: Is the DTC set?

YES : Troubleshoot the SRS. (Refer to GROUP 52B, 

Diagnosis 

P.52B-344

.)

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the other system 
diagnostic trouble code.
Check if DTC U0154 is set to the combination meter.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-64

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the occupant classification-ECU.
NO :  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

).

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace WCM and register the ID codes. (Refer to 

P.42C-10

.)

NO :  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

).

DTC U0155: Combination meter CAN timeout

CAUTION

• If the diagnostic trouble code U0155 is set, be 

sure to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

TROUBLE JUDGMENT

If no signal from the combination meter can be 
received, WCM sets DTC U0155.

.

TROUBLESHOOTING HINTS

• Malfunction of CAN bus line

• Combination meter malfunction

• Malfunction of WCM

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-65

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line. 

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 the 

Scan Tool (M.U.T.-III) 

P.42C-7

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-17

).

STEP 2. Using scan tool MB991958, read the combination 
meter diagnostic trouble code.
Check if DTC is set to the combination meter.
Q: Is the DTC set?

YES : Troubleshoot the combination meter. (Refer to 

GROUP 54A, Diagnosis 

P.54A-34

.)

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C-ECU 
diagnostic trouble code.
Check if the DTC U0155 is set to the A/C-ECU.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-66

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the combination meter.
NO :  The trouble can be an intermittent malfunction such 

as a poor connection or open circuit in the CAN bus 
lines between the combination meter and the WCM. 
(Refer to GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

)

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace WCM and register the ID codes. (Refer to 

P.42C-10

.)

NO :  The trouble can be an intermittent malfunction such 

as a poor connection or open circuit in the CAN bus 
lines between the combination meter and the WCM. 
(Refer to GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

)

DTC U0164: A/C-ECU CAN timeout

CAUTION

• If DTC U0164 is set, be sure to diagnose the 

CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

DIAGNOSTIC FUNCTION

If the signal from A/C-ECU cannot be received, the 
WCM sets DTC U0164.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective.

• The A/C-ECU may be defective.

• The WCM may be defective.

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)