Mitsubishi Outlander GS45X. Manual - part 1165

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-27

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 
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(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

).

TEP 2. Register the key ID and recheck the diagnostic 
trouble code.
Register the key ID of the ignition key (refer to 

P.42C-10

), and 

recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

P.42C-10

.)

NO :  The procedure is complete.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-28

DTC B1A25: Key ID unmatched

CAUTION

When the DTC B1A25 is set, be sure to diagnose 
the CAN bus line.When replacing the ECU, 
always check that the communication circuit is 
normal.

.

DTC SET CONDITION

WCM sets DTC B1A25 when the received key ID is 
different from the one registered in it. 

.

TECHNICAL DESCRIPTION (COMMENT)

WCM determines that the abnormality is present, if 
the key ID for the ignition key does not match the one 
registered in WCM when the ignition switch is turned 
ON.

.

TROUBLESHOOTING HINTS

• Malfunction of the ignition key

• Accessory key not registered

• Accessory WCM not registered

• Key is registered to another vehicle

• 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)

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 
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(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

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-29

STEP 2. Register the key ID and recheck the diagnostic 
trouble code.
Register the key ID of the ignition key (refer to 

P.42C-10

), and 

recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

YES : Go to Step 3.
NO :  The procedure is complete.

STEP 3. Replace the ignition key and recheck the 
diagnostic trouble code.
Replace the ignition key by which the DTC is set with the other 
key, and recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

STEP 4. Register the key ID and recheck the diagnostic 
trouble code.
Register the key ID of the ignition key (refer to 

P.42C-10

), and 

recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

YES : Go to Step 5.
NO :  The procedure is complete.

STEP 5. Replace the ignition key and recheck the 
diagnostic trouble code.
Replace the ignition key with a new one, register the key ID and 
keyless ID of the new key, (refer to 

P.42C-10

), and recheck if 

the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

P.42C-10

).

NO :  The procedure is complete.

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-30

DTC B1A28: Engine control module authenticate error

CAUTION

• When the DTC B1A28 is set, be sure to diag-

nose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

DTC SET CONDITION

WCM sets DTC B1A28 when the ignition key certifi-
cation result and the engine control module starting 
condition do not match.

.

TECHNICAL DESCRIPTION (COMMENT)

WCM determines that the abnormality is present, if 
the key certification result and the engine control 
module starting condition do not match after the 
engine start permission communication is com-
pleted.

.

TROUBLESHOOTING HINTS

• Malfunction of CAN bus line

• Malfunction of WCM

• Engine control module malfunction

• VIN registered in engine control module 

unmatched

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)

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 
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(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

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector