Mitsubishi Outlander GS45X. Manual - part 366

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-85

STEP 7. Check 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. Then go to Step 10.

NO (Deformation) : Replace the rear wheel hub assembly 

<RR> (Refer to GROUP 27A 

− Rear Axle Hub 

Assembly 

P.27A-8

). Then go to Step 10.

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.35B-189

). 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 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 hydraulic unit (integrated with ABS-ECU) 

(Refer to 

P.35B-188

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

AC608763

Ball bearing

Rear hub
assembly

Magnetic
encoder

AB

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-86

DTC C1046: FL wheel speed sensor control phase time exceeded

CAUTION

If there is any problem in the CAN bus lines, an incorrect 
DTC may be set. Prior to this diagnosis, diagnose the CAN 
bus lines (Refer to GROUP 54C 

− CAN Bus Line Diagnostic 

Flow 

P.54C-10

).

.

CIRCUIT OPERATION

• The wheel speed sensor is a type of pulse generator. It con-

sists of encoders (a plate on which north and south pole 
sides of the magnets are arranged alternately) for detecting 
the wheel speed which rotates at the same speed of the 
wheels and wheel speed sensors. This sensor outputs fre-
quency pulse signals in proportion to the wheel speed.

• The pulse signals, which the wheel speed sensor creates, 

are sent to ABS-ECU. ABS-ECU uses the frequency of the 
pulse signals to determine the wheel speed.

AC703729

Wheel Speed Sensor Circuit

ABS-ECU

(LH)

(LH)

(RH)

(RH)

REAR WHEEL SPEED SENSOR

AB

FRONT WHEEL SEED SENSOR

AC901112

Connectors: A-01, A-11

A-01 (B)

AK

A-11 (B)

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-87

.

DTC SET CONDITIONS

This DTC is set if any malfunction below is found:

• When the brake fluid pressure is decreased for a long time.

• When the brake fluid pressure is held for a long time.

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• External noise interference

• Malfunction of wheel speed sensor

• ABS-ECU malfunction

• Excessive gap between the wheel speed sensor and the 

magnetic encoder for wheel speed detection

• Adhesion of foreign materials on the wheel speed sensor

• Adhesion of foreign materials on the magnetic encoder for 

wheel speed detection

• Wheel bearing malfunction

• Improper installation of the wheel speed sensor

• Deformation of the magnetic encoder for wheel speed 

detection

• Disturbance of magnetization pattern for magnetic encoder 

for wheel speed detection

• Missing teeth of the magnetic encoder for wheel speed 

detection

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 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 C1046 set?

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

STEP 3. Using scan tool MB991958, check the DTC
Check that the DTCs C100A, C1011, C1014, or C1041 are also 
set.
Q: Are DTC C100A, C1011, C1014, or C1041 also set?

YES : Carry out the diagnosis for the relevant DTCs.
NO :  Go to Step 4.

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-88

STEP 4. Using scan tool MB991958, check the data list
Check the following data list (Refer to 

P.35B-179

).

• Item No.01: FL wheel speed sensor

Q: Is the check result normal?

YES : Go to Step 11.
NO :  Go to Step 5.

STEP 5. Connector check: A-01 ABS-ECU connector, A-11 
front wheel speed sensor <LH> connector
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the defective connector. Then go to Step 13.

STEP 6. Wiring harness check between A-01 ABS-ECU 
connector terminal No.18 and A-11 front wheel speed 
sensor <LH> connector terminal No.1, and between A-01 
ABS-ECU connector terminal No.19 and A-11 front wheel 
speed sensor <LH> connector terminal No.2.
Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the wiring harness. Then go to Step 13.

STEP 7. Check wheel speed sensor <FL> installation
Check how the wheel speed sensor <FL> is installed (Discon-
nection of wheel speed sensor <FL>, loose mounting bolt, 
etc.).
Q: Is the check result normal?

YES : Go to Step 8.
NO :  Reinstall the wheel speed sensor <FL> (Refer to 

P.35B-189

). Then go to Step 8.

STEP 8. Check for wheel speed sensor <FL> output 
current
Refer to 

P.35B-184

.

Q: Is the check result normal?

YES : Go to Step 9.
NO :  Replace the wheel speed sensor <FL> (Refer to 

P.35B-189

). Then go to Step 12.