Mitsubishi Outlander GS45X. Manual - part 453

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-239

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.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-240

STEP 7. Retest the system.
Q: Does the ASC warning display turn 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.
Q: Does the ASC warning display OFF normally?

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

Inspection Procedure 10: After ASC OFF switch is turned OFF, TCL/Skid control system cannot be
disabled.

ETACS-ECU

ASC
OFF
SWITCH

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-241

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.

OPERATION

The ETACS-ECU terminal No.15 is grounded by pressing the
ASC OFF switch and illuminate the ASC OFF indicator. The
ON/OFF state of the ASC OFF switch is transferred from
ETACS-ECU to ASC-ECU via the CAN bus line.

COMMENTS ON TROUBLE SYMPTOM

This may be caused by the open circuit in the ASC OFF switch
circuit.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• ASC OFF switch malfunction

• ETACS-ECU malfunction

• The ASC OFF switch is pressed for more than 15 seconds

(The system returns to normal by pressing the ignition
switch to the "OFF" position and to the "ON" position).

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. ASC OFF switch check
Refer to

P.35C-286

Q: Is the check result normal?

YES : Go to Step 2.
NO : Replace ASC OFF switch (Refer to

P.35C-285

). Then

go to Step 6.

AC901075BF

Connectors: C-32, C-101

C-32

C-101

AC702828 AO

Connector: C-313

C-313 (BR)

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-242

STEP 2. Connector check: C-313 ETACS-ECU connector,
C-32 intermediate connector, C-101 ASC OFF switch
connector
Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair the damaged connector.

STEP 3. Wiring harness check between C-313 ETACS-ECU
connector terminal No.15 and C-101 ASC OFF switch
connector terminal No.1

• Check the power supply circuit for open circuit.

Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair the wiring harness between C-313

ETACS-ECU connector terminal No.15 and C-101
ASC OFF switch connector terminal No.1.

STEP 4. Wiring harness check between C-101 ASC OFF
switch connector terminal No.2 and the body ground

• Check the ground wires for open circuit.

Q: Is the check result normal?

YES : Go to Step 5.
NO : Repair the wiring harness between C-45 ASC OFF

switch connector terminal No.2 and the body ground.

STEP 5. Retest the system.
Q: Does ASC turn ON and OFF normally using ASC OFF

switch?
YES : Intermittent malfunction (Refer to GROUP 00

− How

to Use Troubleshooting/How to Cope with Intermittent
Malfunctions

P.00-15

NO : Replace the ETACS-ECU (Refer to GROUP 54A

−

ETACS-ECU

P.54A-825

). Then go to Step 6.

STEP 6. Retest the system.
Q: Does ASC turn ON and OFF normally using ASC OFF

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

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