Mitsubishi Outlander GS45X. Manual - part 409

 

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Mitsubishi Outlander GS45X. Manual - part 409

 

 

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-63

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 C1032 set?

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

P.35C-288

). Then go to Step 11.

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

STEP 11. 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 C1032 set?

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

(Refer to 

P.35C-287

). Then go to Step 12.

NO :  The procedure is complete.

STEP 12. 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 C1032 set?

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

DTC C1014 Mutual monitoring of FL wheel speed sensor

CAUTION

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

rect 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

).

• 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 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

).

.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-64

OPERATION

• Each wheel speed detecting section is a kind of a pulse 

generator. It consists of the encoder (plate on which the 
north and south pole of magnet are arranged alternately) for 
detecting the wheel speed, which rotates at the same speed 
of the wheels, and the wheel speed sensor. This detecting 
section outputs the frequency pulse signals in proportion to 
the wheel speed.

• The pulse signals generated by the wheel speed detecting 

section are sent to ASC-ECU. ASC-ECU uses the fre-
quency of the pulse signals to determine the wheel speed.

.

DTC SET CONDITIONS

ASC-ECU monitors the signals from each wheel speed sensor 
while the vehicle is being driven. If any fault below is found in 
these sensor signals, ASC-ECU will set the relevant DTC.

• Missing wheel speed sensor signal

• Wheel speed sensor signal continuously indicates low 

value.

.

PROBABLE CAUSES

Current trouble

• Excessive gap between the wheel speed sensor and the 

wheel speed detection encoder

• Wheel bearing malfunction

• Deformation of the wheel speed detection encoder

• Adhesion of foreign materials on the wheel speed sensor

• Adhesion of foreign materials on the wheel speed detection 

encoder

• Malfunction of wheel speed sensor

• Improper installation of the wheel speed sensor

• ASC-ECU malfunction

• The number of poles on the Magnetic encoder for wheel 

speed detection (N-pole and S-pole) is changed

Past trouble

• When DTC C100A is also set, carry out diagnosis with par-

ticular emphasis on wiring harness and connector failures 
between ASC-ECU and the wheel speed sensor. For diag-
nosis procedures, refer to How to treat past trouble (Refer 
to GROUP 00 

− How to Use Troubleshooting/How to Treat 

Past Trouble 

P.00-17

).

• When DTC C100A is not set, the following conditions may 

be present:

• Some wheels slip

• Unstable vehicle attitude

• External noise interference

• Vehicle ran with the parking brake applied.

• Rotate only two wheels with drum tester

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-65

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 C1014 set?

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

STEP 3. Using scan tool MB991958, check the DTC
Check that DTC C100A is also set.
Q: Is DTC C100A also set?

YES : Perform the diagnosis for DTC C100A (Refer to 

P.35C-21

).

NO :  Go to Step 4.

STEP 4. Check for 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 5.
NO :  Reinstall the wheel speed sensor <FL> correctly 

(Refer to 

P.35C-288

). Then go to Step 5.

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

P.35C-277

.

Q: Is the check result normal?

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

P.35C-288

). Then go to Step 9.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-66

STEP 6. Check for wheel bearing looseness
NOTE: 

.

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

Check the wheel bearing <FL> for looseness (Refer to 
GROUP 26 

 Wheel Bearing Play Check 

P.26-11

).

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Replace the wheel bearing (Refer to GROUP 26 

− 

Front Axle Hub Assembly 

P.26-18

). 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. Then go to Step 10.

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

(Refer to GROUP 26 

− Front Axle Hub Assembly 

P.26-18

). 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 C1014 set?

YES : Replace the wheel speed sensor <FL> (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 C1014 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.

AC504925

Oil seal

Magnetic
encoder

AC

Wheel
bearing

 

 

 

 

 

 

 

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