Mitsubishi Outlander (2013+). Manual - part 467

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-43

STEP 4. M.U.T.-III service data
Check the following data list. (Refer to 

P.35C-85

).

• Item 08: Lateral G sensor

• Item 09: G sensor

• Item 12: Yaw rate sensor

Q: Is the check result normal?

YES : 

Go to Step 5

NO : 

Replace the hydraulic unit (integrated with 
ASC-ECU) (Refer to 

P.35C-95

). Then go to 

Step 9.

STEP 5. Check of steering wheel sensor 
installation status
Check that the steering wheel sensor is installed cor-
rectly.

Q: Is the check result normal?

YES : 

Go to Step 6

NO : 

Install the steering wheel sensor correctly 
(Refer to 

P.35C-98

). Then go to Step 6.

STEP 6. Wheel alignment check
Refer to GROUP 33 

− On-vehicles service/Front 

Wheel Alignment Check and Adjustment .

Q: Is the check result normal?

YES : 

After checking the wheel alignment, perform 

the calibration of steering wheel sensor to 
make ASC-ECU relearn the neutral point 
(Refer to 

P.35C-94

). Then go to Step 7.

NO : 

After adjusting the wheel alignment, perform 
the calibration of steering wheel sensor to 
make ASC-ECU relearn the neutral point 
(Refer to 

P.35C-94

). Then go to Step 7.

STEP 7. M.U.T.-III service data
Check the following data list (Refer to 

P.35C-85

).

• Item 11: Steering angle

Q: Is the check result normal?

YES : 

Go to Step 8

NO : 

Replace the steering wheel sensor (Refer to 

P.35C-98

). Then go to Step 9.

STEP 8. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the steering wheel to either right or left at 20 

km/h or more.

NOTE: The ASC warning/operation lamp and the 
ASC OFF lamp may remain on until the vehicle 
speed reaches approx. 10 km/h,  then the steer-
ing wheel is turned to either right or left.

Q: Is diagnosis code No.C123B set?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

). Then go to 

Step 9.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

STEP 9. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the steering wheel to either right or left at 20 

km/h or more.

NOTE: The ASC warning/operation lamp and the 
ASC OFF lamp may remain on until the vehicle 
speed reaches approx. 10 km/h,  then the steer-
ing wheel is turned to either right or left.

Q: Is diagnosis code No.C123B set?

YES : 

Return to Step 1.

NO : 

The procedure is complete.

Code No. C2200 ECU internal error

CAUTION

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

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

− CAN Bus Diagnostics 

Table ).

• 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 steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

OPERATION

ASC-ECU controls ASC by calculating the data sent 
from the wheel speed sensor, the steering wheel 
sensor, and the G and yaw rate sensor.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-44

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set when ASC-ECU has mal-
function.

PROBABLE CAUSES

ASC-ECU malfunction

DIAGNOSTIC PROCEDURE

Check whether the diagnosis code is reset.
Erase the diagnosis code.

Q: Is the diagnosis code No. C2200 set?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

).

NO : 

This diagnosis is complete.

Code No. C2101 Power supply high voltage

CAUTION

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

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

− CAN Bus Diagnostics 

Table ).

• 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 steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

OPERATION

The ASC-ECU is energized by the valve power sup-
ply circuit (+BV terminal). When the power is sup-
plied from the ignition switch (IG1) to the IG1 relay in 
ETACS-ECU, IG1 relay is turned on. At this time, the 
valve power supply circuit (IG1 terminal) energizes 
the ASC-ECU.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set when the ASC-ECU power 
supply voltage is more than 18.0 

± 1.0 V.

PROBABLE CAUSES

• Battery failure

• ASC-ECU malfunction

• Charging system failed

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III 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 ). On 

completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting 
CAN bus lines

Q: Is the diagnosis code No. C2101 set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. Battery check
Refer to GROUP 54A 

− Battery Test .

Q: Is the battery in good condition?

YES : 

Go to Step 5.

NO : 

Charge or replace the battery. Then go to 
Step 4.

STEP 4. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Alternator 

Output Line Voltage Drop Test .

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the charging system 
component(s).

STEP 5. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the diagnosis code No. C2101 set?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

). Then go to 

Step 6.

NO : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00 

− How to 

Use Troubleshooting/How to Cope with 
Intermittent Malfunctions ).

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-45

STEP 6. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is the diagnosis code No. C2101 set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

Code No. C1395 Incomplete Brake fluid filling

CAUTION

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

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

− CAN Bus Diagnostics 

Table ).

• 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 steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set when the brake fluid is not 
filled in the hydraulic unit.

PROBABLE CAUSES

• Different hydraulic unit (For delivery to factory)

• ASC-ECU malfunction

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.
Erase the diagnosis code.

Q: Is the diagnosis code No. C1395 set?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

).

NO : 

This diagnosis is complete.

Code No. C121C Torque request signal denied

CAUTION

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

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

− CAN Bus Diagnostics 

Table ).

• 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 steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

OPERATION

ASC-ECU sends the signal to the engine ECU as 
necessary to decrease the engine output for the ASC 
system operation.

DIAGNOSIS CODE SET CONDITIONS

This diagnosis code is set when the request for the 
decrease of output is rejected by the engine ECU.

PROBABLE CAUSES

• Wrong coding of engine ECU

• Engine ECU malfunction

• ASC-ECU malfunction

• External noise interference

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III 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 ). On 

completion, go to Step 2.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-46

STEP 2. Diagnosis code recheck after resetting 
CAN bus lines

Q: Is diagnosis code No.C121C set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. M.U.T.-III other system diagnosis code
Use M.U.T.-III to check that the diagnosis code is set 
in the engine ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the engine ECU diagnosis 

code (Refer to GROUP 13A 

− 

Troubleshooting/Diagnosis function ), and 
then go to Step 7.

NO : 

Go to Step 4.

STEP 4. M.U.T.-III diagnosis code
Check that diagnosis code No.C1707 is set in 
ASC-ECU.

Q: Is diagnosis code No.C1707 set?

YES : 

Troubleshoot for diagnosis code No.C1707 

(Refer to 

P.35C-59

). Then go to Step 5.

NO : 

Replace the hydraulic unit (integrated with 
ASC-ECU) (Refer to 

P.35C-95

). Then go to 

Step 7.

STEP 5. M.U.T.-III data list
Check the following service data (Refer to 

P.35C-85

).

• Item 68: Allow ESP torque request

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the engine ECU (Refer to GROUP 
13A 

− engine ECU ), and then go to Step 7.

STEP 6. Check whether the diagnosis code is 
reset.
Erase the diagnosis code.

Q: Is diagnosis code No.C121C set?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

). Then go to 

Step 7.

NO : 

If the trouble symptom is resolved, an 
intermittent malfunction such as poorly 
engaged connector(s) or wiring harness is 
suspected (Refer to GROUP 00 

− How to 

Use Troubleshooting/How to Cope with 
Intermittent Malfunctions ).

STEP 7. Diagnosis code recheck
Erase the diagnosis code.

Q: Is diagnosis code No.C121C set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

Code No.C2206 Re-execution of variant coding

CAUTION

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

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

− CAN Bus Diagnostics 

Table ).

• If diagnosis code No.C2206 is set in 

ASC-ECU, always diagnose the CAN bus line. 
If there is any fault in the CAN bus lines, an 
incorrect diagnosis code may be set. In this 
case, the set diagnosis code is not highly reli-
able.

• Before replacing the ECU, ensure that the 

communication circuit is normal.

• When diagnosis code No.C2206 is set in 

ASC-ECU, the diagnosis code may also be set 
in ETACS-ECU. When the diagnosis code is 
set in ETACS-ECU, carry out the diagnosis of 
the diagnosis code for ETACS-ECU first.

• When the hydraulic unit (integrated with 

ASC-ECU) is replaced, always carry out the 
calibration of the steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

OPERATION

ASC-ECU receives the vehicle information stored in 
the ETACS-ECU via CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS

ASC-ECU communicates with ETACS-ECU via CAN 
bus lines. This diagnosis code is set if the vehicle 
information stored in ETACS-ECU varies from the 
one stored when the ignition switch was last turned 
on.