Mitsubishi Outlander GS45X. Manual - part 1639

DIAGNOSIS

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23A-113

LOGIC FLOW CHARTS (Monitor Sequence)

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DTC SET CONDITIONS

Check Conditions

• Time after TCM start: more than 1.05 seconds.

• Voltage of battery: 9 volts or more

• Voltage of battery: 16 volts or less

JUDGMENT CRITERIA

• CAN communication with ECM: fail. (500 millisec-

ond)

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OBD-II DRIVE CYCLE PATTERN

Ignition switch : ON (start the engine and keep it for 
10 seconds or more)

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PROBABLE CAUSES

• Malfunction of the CAN bus

• Engine ECU malfunction

• Malfunction of TCM

AC609281

START

Yes

No

TCM is started

Timer > 1.05 secs.

Timer start

CAN communication with ECM is fail

Yes

No

Yes

No

Yes

No

Good

Malfunction

END

Continuous failure for 500 msecs.

Continuous failure

AC

DIAGNOSIS

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DIAGNOSTIC PROCEDURE

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting, Diagnostic Trouble Code Chart 

P.54C-19

).

STEP 2. Scan tool MB991958 diagnostic trouble code
Check if the engine-related diagnostic trouble code is set.
Q: Is the engine-related diagnostic trouble code set?

YES : Carry out the appropriate troubleshooting.
NO :  Go to Step 3.

STEP 3. Symptom recheck after erasing diagnostic trouble 
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Replace TCM.

DTC U0121: CAN Time-out Error (ABS)

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DIAGNOSTIC FUNCTION

TCM determines that malfunction is present if the 
periodic communication data sent from the 
ABS-ECU via CAN bus lines is abnormal.

.

JUDGMENT CRITERIA

TCM cannot receive the periodic communication 
data from ABS-ECU. 

.

PROBABLE CAUSES

• Malfunction of the CAN bus

• ABS-ECU malfunction

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting, Diagnostic Trouble Code Chart 

P.54C-19

).

DIAGNOSIS

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STEP 2. Scan tool MB991958 diagnostic trouble code
Check if the ABS-related diagnostic trouble code is set.
Q: Is the ABS-related diagnostic trouble code set?

YES : Carry out the appropriate troubleshooting.
NO :  Go to Step 3.

STEP 3. Symptom recheck after erasing diagnostic trouble 
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Replace TCM.

DTC U0141: CAN Time-out Error (ETACS)

.

DIAGNOSTIC FUNCTION

TCM determines that malfunction is present if the 
periodic communication data sent from ETACS-ECU 
via the CAN bus lines is abnormal.

.

JUDGMENT CRITERIA

TCM cannot receive the periodic communication 
data from ETACS-ECU. 

.

PROBABLE CAUSES

• Malfunction of the CAN bus

• Malfunction of ETACS-ECU

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to perform the CAN bus diagnosis.
Q: Is the check result normal?

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

− 

Troubleshooting, Diagnostic Trouble Code Chart 

P.54C-19

.)

STEP 2. Scan tool MB991958 diagnostic trouble code
Check if ETACS-related diagnostic trouble code is set.
Q: Is the ECU-related diagnostic trouble code set?

YES : Carry out the appropriate troubleshooting.
NO :  Go to Step 3.

STEP 3. Symptom recheck after erasing diagnostic trouble 
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Replace TCM.

DIAGNOSIS

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SYMPTOM PROCEDURES

Inspection Procedure 1: TCM cannot communication with scan tool.

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AC901225

RELAY BOX

CVT
CONTROL
RELAY

POWER SOURCE

FUSIBLE
LINK

36

TRANSAXLE
CONTROL MODULE

ENGINE
COMPARTMENT

TCM POWER SUPPLY CIRCUIT

AC709650

Connector: A-18X

AB

AC703253

Connector: C-38

Brake pedal

AB