Mitsubishi Outlander GS45X. Manual - part 422

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-115

DTC SET CONDITIONS

These diagnostic trouble codes will be set under the cases 
below:

• The solenoid valve is not energized even after ASC-ECU 

has turned on the valve relay (Open circuit is present in the 
power supply circuit to the ASC-ECU solenoid valve, or the 
valve relay has failed).

• The solenoid valve is not activated even after ASC-ECU 

has turned on the valve relay (Open circuit is present in the 
solenoid valve circuit in ASC-ECU, or the valve relay has 
failed).

• After ASC-ECU has turned off the driving transistor, the 

solenoid valve still remains energized (short in the solenoid 
valve circuit).

• When a solenoid valve failure is detected

.

PROBABLE CAUSES

• ASC-ECU malfunction

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. M.U.T.-III CAN bus diagnostics
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-16

). On 

completion, go to Step 2.

STEP 2. Diagnostic trouble code recheck after resetting 
CAN bus lines
Erase the DTC.
Q: Are DTC C104B, C104F, C1053, C1057, C105F, C1063, 

C1067, C105B, C1200, C1204, C1208 or C120C set?
YES : Go to Step 3.
NO :  The procedure is complete.

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-116

STEP 3. Check whether the diagnostic trouble code is 
reset.
Erase the DTC.
Q: Are DTC C104B, C104F, C1053, C1057, C105F, C1063, 

C1067, C105B, C1200, C1204, C1208 or C120C set?
YES : Replace the hydraulic unit (integrated with ASC-ECU) 

(Refer to 

P.35C-287

).

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

DTC C2104: Faulty valve power supply circuit

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

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-117

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

).

• Whenever ECU is replaced, ensure that the CAN bus 

lines are 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

).

.

OPERATION

• ASC-ECU contains the power supply circuit (terminal No. 

32) for the solenoid valve. The solenoid valve is energized 
by the valve relay, which is incorporated in ASC-ECU.

• The valve relay, which is incorporated in ASC-ECU, is 

always energizing the solenoid valve unless the initial check 
is in progress when the ignition switch is turned on, or the 
recurrent system check is in progress.

.

DTC SET CONDITIONS

This diagnostic trouble codes will be set when the solenoid 
valve supply voltage is not within the standard value.

.

PROBABLE CAUSES

Current trouble

• Fusible link malfunction

• Damaged wiring harness and connectors

• Abnormality in battery or generator

• ASC-ECU malfunction

Past trouble

• Carry out diagnosis with particular emphasis on wiring har-

ness and connector failures between the power supply cir-
cuit (terminal No.32) to ASC-ECU solenoid valve or ground 
circuit (terminal No.16 and 47). For diagnosis procedures, 
refer to How to treat past trouble (Refer to GROUP 00 

− 

How to Use Troubleshooting/How to Treat Past Trouble 

P.00-17

).

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

• MB991997: ASC check harness

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-118

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 C2104 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.27.
Visually check for open circuit in the fusible link No.27.
Q: Is the check result normal?

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