Mitsubishi Outlander GS45X. Manual - part 1167

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-35

DTC B2101: IG SW start POS.circuit low

 

DTC B2102: IG SW start POS.circuit high

CAUTION

• If DTC B2101 or B2102 is set, be sure to diag-

nose the CAN bus line.

• Before replacing the ECU, ensure that the 

communication circuit is normal.

.

ACA02745

WCM Communication Circuit

34

FUSIBLE
LINK

IGNITION
SWITCH (IG1)

ETACS-
ECU

ID CODE

TRANSPONDER

IG1
RELAY

WCM

POWER 
SUPPLY

AB

AC701632AD

Connector: C-317

AC702145 AI

Connector: C-29

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-36

DTC SET CONDITION

WCM sets DTC B2101 or B2012 when the actual 
state of the ignition switch and the ignition switch 
position information received from ETACS-ECU via 
CAN do not match.

.

TECHNICAL DESCRIPTION (COMMENT)

WCM determines that the abnormality is present, if it 
has detected discrepancy in the ignition switch level 
shown below ten consecutive times when WCM has 
received the CAN message (ignition switch position 
information) from ETACS-ECU with the ignition 
switch turned to the ON or START position.

B2101

• Status of ignition switch: OFF position

• Ignition switch position information from the 

ETACS-ECU: ON

B2102

• Status of ignition switch: ON position

• Ignition switch position information from the 

ETACS-ECU: OFF

.

TROUBLESHOOTING HINTS

• Malfunction of CAN bus line

• Malfunction of the WCM

• Malfunction of the ignition switch

• Damaged wiring harness and connectors

• Malfunction of ETACS-ECU

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-37

STEP 2. Check ETACS-ECU connector C-317 and WCM 
connector C-29 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.
Q: Is ETACS-ECU connector C-317 and WCM connector 

C-29 in good condition?
YES : Go to Step 3.
NO :  Repair the defective connector.

STEP 3. Check the wiring harness between WCM 
connector C-29 (terminal No.9) and ETACS-ECU connector 
C-317 (terminal No.5). 

• Check the power supply line for open circuit.

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

(terminal No. 9) and ETACS-ECU connector C-317 
(terminal No. 5) in good condition?
YES : Go to Step 4.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector.

STEP 4. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to 
the ignition voltage.
Turn the ignition switch from "LOCK" (OFF) position to "ON" 
position.

Q: Does scan tool MB991958 display the item "IG voltage" 

as normal condition?
YES : Go to Step 5.
NO :  Diagnose the ETACS-ECU. Refer to GROUP 54A, 

Diagnosis 

P.54A-733

.

Item No.

Item name

Normal 
conditions

Item 254

IG voltage

Battery 
positive 
voltage

DIAGNOSIS

TSB Revision

WIRELESS CONTROL MODULE (WCM)

42C-38

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 B2204: Coding data mismatch

CAUTION

• When DTC B2204 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

If the vehicle information data transmitted from the 
ETACS-ECU via the CAN bus lines is different from 
that registered in the WCM, the WCM sets the DTC 
No. B2204.

.

TECHNICAL DESCRIPTION (COMMENT)

WCM determines that the abnormality is present 
when the vehicle information registered in it does not 
match the vehicle information data.

.

TROUBLESHOOTING HINTS

• Malfunction of WCM

• Malfunction of ETACS-ECU

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