Mitsubishi Outlander GS45X. Manual - part 444

 

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Mitsubishi Outlander GS45X. Manual - part 444

 

 

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-203

STEP 4. Wiring harness check between A-02 ASC-ECU 
connector terminals No.18 and C-26 G and yaw rate sensor 
connector terminals No.3, and between A-02 ASC-ECU 
connector terminals No.19 and C-26 G and yaw rate sensor 
connector terminals No.2.
Check for open and short circuit in communication circuit
Q: Is the check result normal?

YES : Go to Step 5.
NO :  Repair the wiring harness, and then go to Step 7.

STEP 5. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0125 set?

YES : Replace the G and yaw rate sensor (Refer to 

P.35C-290

) and then go to Step 6.

NO :  The procedure is complete.

STEP 6. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0125 set?

YES : Replace the hydraulic unit (integrated with ASC-ECU) 

(Refer to 

P.35C-287

), and then go to Step 7.

NO :  The procedure is complete.

STEP 7. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0125 set?

YES : Return to Step 1.
NO :  The procedure is complete.

DTC U0401: Engine malfunction detected

CAUTION

• If there is any problem in the CAN bus lines, an incor-

rect diagnostic trouble code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to 
GROUP 54C 

 CAN Bus Line Diagnostic Flow 

P.54C-10

).

• If diagnostic trouble code U0401 is set in ASC-ECU, 

always diagnose the CAN bus line. If there is any fault 
in the CAN bus lines, an incorrect diagnostic trouble 
code may be set. In this case, the set diagnostic trouble 
code is not highly reliable.

• Before replacing the ECU, ensure that the communica-

tion circuit is normal.

.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-204

CIRCUIT OPERATION

Engine-related signals are sent or received to and from 
between ASC-ECU and engine control module via CAN bus 
lines.

.

DTC SET CONDITIONS

This diagnostic trouble code is set when the engine control 
module malfunction has been detected.

.

PROBABLE CAUSES

• Malfunction of engine system

• Engine control module malfunction

• ASC-ECU malfunction

• External noise interference

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

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

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

− 

CAN Bus Diagnostics Table 

P.54C-17

). On 

completion, go to Step 5.

STEP 2. Using scan tool MB991958, DTC
Use scan tool to check that any diagnostic trouble code other 
than the code U0401 is set in ASC-ECU.
Q: Is any DTC set?

YES : Troubleshoot the relevant diagnostic trouble code, 

and then go to Step 5.

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958,  other system DTC
Use scan tool to check that the diagnostic trouble code is set by 
the engine control module.
Q: Is any DTC set?

YES : Troubleshoot the relevant diagnostic trouble code, 

and then go to Step 5.

NO :  Go to Step 4.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-205

STEP 4. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0401 set?

YES : Replace the hydraulic unit (integrated with ASC-ECU) 

(Refer to 

P.35C-287

), and then go to Step 5.

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

STEP 5. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0401 set?

YES : Return to Step 1.
NO :  The procedure is complete.

DTC U0428: Communication error in steering wheel sensor

CAUTION

• If there is any problem in the CAN bus lines, an incor-

rect diagnostic trouble code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to 
GROUP 54C 

 CAN Bus Line Diagnostic Flow 

P.54C-10

).

• If diagnostic trouble code U0428 is set in ASC-ECU, 

always diagnose the CAN bus line. If there is any fault 
in the CAN bus lines, an incorrect diagnostic trouble 
code may be set. In this case, the set diagnostic trouble 
code is not highly reliable.

• Before replacing the ECU, ensure that the communica-

tion circuit is normal.

• When the hydraulic unit (integrated with ASC-ECU) is 

replaced, always carry out the calibration of the steer-
ing wheel sensor, the G and yaw rate sensor and brake 
fluid pressure sensor (Refer to 

P.35C-282

P.35C-283

 

and 

P.35C-284

).

.

CIRCUIT OPERATION

The steering wheel sensor outputs the steering wheel status to 
ASC-ECU via the CAN bus lines.

.

DTC SET CONDITIONS

This diagnostic trouble code is set when ASC-ECU has 
detected the communication error in the steering wheel sensor.

.

PROBABLE CAUSES

• Steering wheel sensor malfunction

• ASC-ECU malfunction

• External noise interference

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-206

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

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

YES : Replace the steering wheel sensor (Refer to 

P.35C-291

). Then go to Step 2.

NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics Table 

P.54C-17

). On 

completion, go to Step 3.

STEP 2. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0428 set?

YES : Replace the hydraulic unit (integrated with ASC-ECU) 

(Refer to 

P.35C-287

).

NO :  The procedure is complete.

STEP 3. Check whether the DTC is reset.
Erase the DTC.
Q: Is DTC U0428 set?

YES : Return to Step 1.
NO :  The procedure is complete.

 

 

 

 

 

 

 

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