Mitsubishi Outlander GS45X. Manual - part 424

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-123

• MB991997: ASC check harness

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 3.
NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics Table 

P.54C-17

). On 

completion, go to Step 2.

STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC C1073 set?

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

STEP 3. Battery check
Refer to GROUP 54A 

− Battery Test 

P.54A-9

.

Q: Is the battery in good condition?

YES : Go to Step 5.
NO :  Replace the battery. Then go to Step 4.

STEP 4. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Output Current Test 

P.16-9

.

Q: Is the charging system in good condition?

YES : Go to Step 5.
NO :  Repair or replace the charging system component(s). 

Then go to Step 11.

STEP 5. Connector check: A-02 ASC-ECU connector
Q: Is the check result normal?

YES : Go to Step 6.
NO  :  Repair the defective connector. Then go to Step 11.

STEP 6. Fusible link check: Check the fusible link No.26.
Visually check for open circuit in the fusible link No.26.
Q: Is the check result normal?

YES : Go to Step 8.
NO :  Go to Step 7.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-124

STEP 7. Resistance measurement at A-02 ASC-ECU 
connector
(1) Disconnect the ASC-ECU connector, connect special tool 

ASC check harness (MB991997) to the harness-side 
connector, and then measure the resistance at the special 
tool connector side.
NOTE: Do not connect the special tool ASC check harness 
(MB991997) to ASC-ECU.

(2) Disconnect the fusible link No.26.
(3) Measure the resistance between the terminal No.1 and the 

body ground.

OK: No continuity

Q: Is the check result normal?

YES : Replace the fusible link No.26. Then go to Step 11.
NO :  The short circuit may be present in the power supply 

circuit. Repair the wiring harness between the A-02 
ASC-ECU connector terminal No.1 and the fusible 
link No.26, and then replace the fusible link No.26. 
Then go to Step 11.

STEP 8. Voltage measurement at the A-02 ASC-ECU 
connector
(1) Disconnect the ASC-ECU connector, connect special tool 

ASC check harness (MB991997) to the harness-side 
connector, and then measure the voltage at the special tool 
connector side.
NOTE: Do not connect the special tool ASC check harness 
(MB991997) to ASC-ECU.

(2) Measure the voltage between the terminal No.1 and the 

body ground.

OK: Approximately system voltage

Q: Is the check result normal?

YES : Go to Step 9.
NO :  The open circuit may be present in the power supply 

circuit. Repair the wiring harness between the A-02 
ASC-ECU connector terminal No.1 and the fusible 
link No.26. Then go to Step 11.

AC611137 BW

ASC-ECU

MB991997

A-02 ASC-ECU 
harness connector

Check harness

AC611137 BJ

ASC-ECU

MB991997

A-02 ASC-ECU 
harness connector

Check harness

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-125

STEP 9. Resistance measurement at A-02 ASC-ECU 
connector
(1) Disconnect the ASC-ECU connector, connect special tool 

ASC check harness (MB991997) to the harness-side 
connector, and then measure the resistance at the special 
tool connector side.
NOTE: Do not connect the special tool ASC check harness 
(MB991997) to ASC-ECU.

(2) Measure the resistance between the terminal No.16 and the 

body ground, and between the terminal No.47 and the body 
ground.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : Go to Step 10.
NO :  An open circuit may be present in the ground circuit. 

Repair the wiring harness between the A-02 
ASC-ECU connector terminal No.16 and the body 
ground, and between the A-02 ASC-ECU connector 
terminal No.47 and the body ground. Then go to Step 
11.

STEP 10. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12 mph (20 km/h) or higher.

NOTE: The ABS warning light does not turn OFF in some 
cases unless the vehicle runs at 12 mph (20 km/h) or 
higher.

Q: Is DTC C1073?

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

(Refer to 

P.35C-287

). Then go to Step 11.

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

STEP 11. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12 mph (20 km/h) or higher.

NOTE: The ABS warning light does not turn OFF in some 
cases unless the vehicle runs at 12 mph (20 km/h) or 
higher.

Q: Is DTC C1073?

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

AC611137

ASC-ECU

MB991997

A-02 ASC-ECU 
harness connector

Check harness

BK

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-126

DTC C2116: Low or high power supply voltage in pump motor

16

47

GND

GND

AC703902

Solenoid Valve and Motor Power Supply Circuit

FUSIBLE
LINK

27

FUSIBLE
LINK

26

ASC-ECU

SOLENOID
VALVE
POWER
SOURCE

MOTOR
POWER
SOURCE

MOTOR 
POWER
SOURCE

SOLENOID
VALVE 
POWER
SOURCE

SOLENOID VALVE

HYDRAULIC UNIT

MOTOR

AB

AC901112

Connector: A-02

A-02 (B)

AF