Mitsubishi Outlander GS45X. Manual — part 451

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-231

STEP 4. Check the ASC-ECU power supply circuit system.
Refer to

P.35C-247

Q: Is the check result normal?

YES : Go to Step 5.
NO : Diagnose the power supply circuit of the ASC-ECU

(Refer to

P.35C-247

STEP 5. Using scan tool MB991958, check the other
system DTC
Using scan tool, check that DTC U0141 is not set by the combi-
nation meter system.
Q: Is the DTC set?

YES : Diagnose the combination meter (Refer to GROUP

54A

− Combination Meter/DTC

P.54A-53

). Then go to

Step 8.

NO : Go to Step 6.

STEP 6. Using scan tool MB991958, check the other
system DTC
Using scan tool, check that DTC U0121 is not set by the
ETACS system.
Q: Is the DTC set?

YES : Perform troubleshooting on ETACS-ECU (Refer to

GROUP 54A

− ETACS/DTC

P.54A-741

). Then go to

Step 8.

NO : Go to Step 7.

STEP 7. Retest the system.
(1) Erase the DTC.
(2) Drive the vehicle at 6 mph (10 km/h) or higher.
Q: Does the ABS warning light turn ON and OFF normally?

YES : Intermittent malfunction (Refer to GROUP 00

− How

to Use Troubleshooting/How to Cope with Intermittent
Malfunctions

P.00-15

NO : Replace the hydraulic unit (integrated with ASC-ECU)

(Refer to

P.35C-287

), and then go to Step 8.

STEP 8. Retest the system.
(1) Erase the DTC.
(2) Drive the vehicle at 6 mph (10 km/h) or higher.
Q: Does the ABS warning light turn ON and OFF normally?

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

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-232

Inspection Procedure 7: ASC warning display stays ON after the engine is started.

CAUTION

• Whenever ECU is replaced, ensure that the CAN bus

lines (Refer to GROUP 54C

− CAN Bus Line Diagnostic

Flow

P.54C-10

) 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 sends the illumination request signal of the ASC
warning display to the combination meter through ETACS-ECU
via the CAN communication.

TECHNICAL DESCRIPTION (COMMENT)

This may be caused by faults in the CAN bus line,
ETACS-ECU, combination meter or ASC-ECU.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of ETACS-ECU

• Combination meter malfunction

• ASC-ECU malfunction

• Control is disabled due to the low voltage

NOTE: Due to the abnormality in the supply voltage, the
diagnostic trouble code may not be set even when the ASC
warning display illuminates.

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

). Then go to

Step 8.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-233

STEP 2. Using scan tool MB991958, check the DTC
Use scan tool to check the DTC for the ASC system.
Q: Is the DTC set?

YES : Carry out the diagnosis for the DTC (Refer to

P.35C-18

NO : Go to Step 3.

STEP 3. Actuator test of combination meter
Perform the following actuator test by the combination meter
system, and check if the ASC warning display illuminates nor-
mally (Refer to GROUP 54A

− Combination Meter/Actuator

Test Table

P.54A-91

• Item No.13: Indicator 4

Q: Is the check result normal?

YES : Go to Step 4.
NO : Replace the combination meter (Refer to GROUP

54A

− Combination Meter

P.54A-118

). Then go to

Step 8.

STEP 4. Check the ASC-ECU power supply circuit system.
Refer to

P.35C-247

Q: Is the check result normal?

YES : Go to Step 5.
NO : Diagnose the power supply circuit of the ASC-ECU

(Refer to

P.35C-247

STEP 5. Using scan tool MB991958, check the other
system DTC
Using scan tool, check that DTC U0141 is not set by the combi-
nation meter system.
Q: Is the DTC set?

YES : Diagnose the combination meter (Refer to GROUP

54A

− Combination Meter/DTC

P.54A-53

). Then go to

Step 8.

NO : Go to Step 6.

STEP 6. Using scan tool MB991958, check the other
system DTC
Using scan tool, check that DTC U0121 is not set by the
ETACS system.
Q: Is the DTC set?

YES : Perform troubleshooting on ETACS-ECU (Refer to

GROUP 54A

− ETACS/DTC

P.54A-741

). Then go to

Step 8.

NO : Go to Step 7.