Mitsubishi Grandis. Manual — part 924

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-21

STEP 13. Check the harness wires between
TCL/ASC-ECU connector A-04 (terminal 36, 37)
and wheel speed sensor <rear: LH> connector
D-14 (terminal 1, 2).

Q: Is the check result normal?

YES :

Go to Step 14.

NO :

Repair the wiring harness. Then go to Step
16.

STEP 14. Inspect the wheel speed sensor.

Check the wheel speed sensor relevant to the
diagnosis code. For the applicable inspection
procedure, refer to

P.35B-81

.

• When code No.C1200 is set: Front right wheel

speed sensor

• When code No.C1205 is set: Front left wheel

speed sensor

• When code No.C1210 is set: Rear right wheel

speed sensor

• When code No.C1215 is set: Rear left wheel

speed sensor

Q: Is the check result normal?

YES :

It can be assumed that this malfunction is

intermittent. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-5

.

NO :

Replace the wheel speed sensor. Then go
to Step 16.

STEP 15. Check whether the diagnosis code is
reset.

Check again if the diagnosis code is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF)

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is reset.
(6) Turn the ignition switch to the "LOCK" (OFF)

position.

AC312621

Oil reservoir

Connector: A-04

AB

A-04

Hydraulic unit
(with built-in TCL/ASC-ECU)

A-04 Harness connector
(harness side)

AC312622

Connector: D-14 <L.H.drive vehicles>

D-14 (B)

AE

D-14 Harness
connector
(harness side)

AC312623

Connector: D-14 <R.H.drive vehicles>

D-14 (B)

AE

D-14 Harness
connector
(harness side)

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-22

Q: Is code No.C1200, C1205, C1210 or C1215 set?

YES :

Replace the hydraulic unit (integrated with

TCL/ASC-ECU). Then go to Step 16.

NO :

It can be assumed that this malfunction is
intermittent. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-5

.

STEP 16. Check whether the diagnosis code is
reset.

(1) Turn the ignition switch to the "ON" position.

(2) After repair, drive the vehicle at 20km/h or more

for 30 seconds or more.

(3) Erase the diagnosis code.
(4) Turn the ignition switch to the "LOCK" (OFF)

position.

(5) Turn the ignition switch to the "ON" position.
(6) After repair, drive the vehicle at 20km/h or more

for 30 seconds or more.

(7) Check if the diagnosis code is set.
(8) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1200, C1205, C1210 or C1215 set?

YES :

Repeat the troubleshooting from Step 1.

NO :

The procedure is complete.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-23

Code No.C1201: Front Right Wheel Speed Sensor
Code No.C1206: Front Left wheel Speed Sensor
Code No.C1211: Rear Right wheel Speed Sensor
Code No.C1216: Rear Left wheel Speed Sensor

CAUTION

If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Diagnose
the CAN bus lines before the diagnosis codes
(Refer to GROUP 54D, CAN bus-line diagnostic
flow

P.54D-9

).

OPERATION

• Wheel speed sensor is a kind of a pulse

alternator. It consists of encoders (a plate on
which north and south pole sides of the magnets
are arranged alternately) for detecting wheel

speed which rotates at the same speed of the
wheels and speed sensors. This sensor outputs
frequency pulse signals in proportion to wheel
speed.

• The wheel speed sensors transmit the frequency

of the current pulses and the amount of voltage
generated by each pulse to the TCL/ASC-ECU.

(FRONT: LH)

(FRONT: RH)

(REAR: LH)

(REAR: RH)

WHEEL SPEED SENSOR

TCL/ASC-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

Wheel Speed Sensor Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-24

DIAGNOSIS CODE SET CONDITIONS

The TCL/ASC-ECU monitors the signals from each
ABS sensor while the vehicle is being driven. If any
faults below are found in these sensor signals, the
ECU will set the relevant diagnosis code.

• Missing sensor signal

• Sensor signal, which will not be created under

normal operation

• Significant difference among the ABS sensor

signals

PROBABLE CAUSES

The most likely causes for these diagnosis codes to
set are:

• Stiking metal shards to vehicle speed detection

encoder

• Damage of vehicle speed detection encoder

• Incorrect installation of vehicle speed sensor

• Malfunction of vehicle speed sensor and encoder

installing parts (bearing, knuckle)

• Malfunction of the wheel speed sensor

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit (integrated with

TCL/ASC-ECU)

DIAGNOSIS

STEP 1. MUT-III CAN bus diagnostics

CAUTION

Before connecting or disconnecting the MUT-III,
turn the ignition switch to the "LOCK" (OFF)
position.
(1) Connect MUT-III to the 16-pin diagnosis

connector.

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is the check result normal?

YES :

Go to Step 3

NO :

Repair the CAN bus line (Refer to GROUP
54D, CAN bus line Diagnostic flow

P.54D-9

). Then go to Step 2.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824