Mitsubishi Outlander GS45X. Manual — part 1167

DIAGNOSIS

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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

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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

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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

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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