Mitsubishi Outlander GS45X. Manual - part 416

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-91

• 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 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 C1044 set?

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

STEP 3. Using scan tool MB991958, check the DTC
Check that the DTC C102B is also set.
Q: Is the DTC C102B also set?

YES : Perform the diagnosis for the DTC C102B (Refer to 

P.35C-37

).

NO :  Go to Step 4.

STEP 4. Check for wheel speed sensor <RR> installation
Check how the wheel speed sensor <RR> is installed (Discon-
nection of wheel speed sensor <RR>, loose mounting bolt, 
etc.).
Q: Is the check result normal?

YES : Go to Step 5.
NO :  Reinstall the wheel speed sensor <RR> correctly 

(Refer to 

P.35C-288

). Then go to Step 5.

STEP 5. Check for wheel speed sensor <RR> output 
current
Refer to 

P.35C-277

.

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Replace the wheel speed sensor <RR> (Refer to 

P.35C-288

). Then go to Step 9.

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-92

STEP 6. Check for wheel bearing looseness
NOTE: 

.

•

Loose wheel bearing may increase the gap between the 
wheel speed sensor <RR> and the wheel speed detection 
magnet encoder.

•

Check the Rear wheel hub assembly <RR (FWD)> (Refer to 
GROUP 27A 

−

 Wheel Bearing Play Check 

P.27A-6

).

•

Check the wheel bearing <RR (AWD)> for looseness (Refer 
to GROUP 27B 

−

 Wheel Bearing Play Check 

P.27B-17

).

Q: Is the check result normal?

YES : Go to Step 7.
NO (FWD) : Replace the rear wheel hub assembly <RR> 

(Refer to GROUP 27A 

− Rear Axle Hub Assembly 

P.27A-8

). Then go to Step 10.

NO (AWD) : Replace the wheel bearing <RR> (Refer to 

GROUP 27B 

− Rear Axle Hub Assembly 

P.27B-19

). 

Then go to Step 10.

STEP 7. Check of wheel speed detection encoder
Check the encoder for adhesion of foreign materials or defor-
mation.
Q: Is the check result normal?

YES : Go to Step 8.
NO (Adhesion of foreign materials) : Remove the foreign 

materials and clean the encoder so as not to disturb 
the magnetization pattern on it while taking care of the 
magnet, magnetic substance, and magnetic 
attraction.

NO <Deformation (FWD)> : Replace the rear wheel hub 

assembly <RR> (Refer to GROUP 27A 

− Rear Axle 

Hub Assembly 

P.27A-8

). Then go to Step 10.

NO <Deformation (AWD)> : Replace the wheel bearing 

<RR> (Refer to GROUP 27B 

− Rear Axle Hub 

Assembly 

P.27B-19

). Then go to Step 10.

AC704785

Rear hub

Oil seal

Ball bearing

Magnetic
encoder

AB

Magnetic
encoder

Rear hub
assembly

Rear wheel bearing

<FWD>

<AWD>

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-93

STEP 8. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12mph (20 km/h) or higher.

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

Q: Is DTC C1044 set?

YES : Replace the wheel speed sensor <RR> (Refer to 

P.35C-288

). Then go to Step 9.

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

STEP 9. 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 C1044 set?

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

(Refer to 

P.35C-287

). Then go to Step 10.

NO :  The procedure is complete.

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 C1044 set?

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

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-94

DTC C1046: FL wheel speed sensor control phase time exceeded

Wheel Speed Sensor Circuit

ASC-ECU

FRONT 
WHEEL 
SPEED 
SENSOR 
(LH)

FRONT 
WHEEL 
SPEED 
SENSOR 
(RH)

REAR 
WHEEL 
SPEED 
SENSOR 
(LH)

REAR 
WHEEL 
SPEED 
SENSOR 
(RH)

AC901112

Connectors: A-02, A-11

A-02 (B)

AN

A-11 (B)