Mitsubishi Grandis. Manual - part 949

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-121

STEP 2. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set.

CAUTION

Before connecting or disconnecting the MUT-III, 
turn the ignition switch to the "LOCK" (OFF) 
position.
(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 set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.U1073 set?

YES : 

Replace the steering wheel sensor. Then go 

to Step 3.

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 3. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set.

CAUTION

Before connecting or disconnecting the MUT-III, 
turn the ignition switch to the "LOCK" (OFF) 
position.
(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 set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.U1073 set?

YES : 

Go to Step 1.

NO : 

The procedure is complete.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-122

SYMPTOM CHART

M1355006900026

Symptom

Inspection 
procedure No.

Reference page

Communication with 
MUT-III is not 
possible

Communication with all systems is 
impossible

-

Group 54D, 
Diagnosis 

P.54D-16

.

Communication with the TCL/ASC-ECU 
only is impossible

1

P.35C-123

Communication with the steering wheel 
sensor only is impossible

2

P.35C-126

TCL/ASC-ECU power supply circuit system

3

P.35C-129

Steering wheel sensor power supply circuit system

4

P.35C-135

G and yaw late sensor power supply circuit system

5

P.35C-141

When the ignition switch is turned to the "ON" position (engine 
stopped), the TCL OFF indicator lamp dose not illuminate.

6

P.35C-150

When the ignition switch is turned to the "ON" position (engine 
stopped), the TCL/ASC indicator lamp dose not illuminate.

7

The TCL OFF indicator lamp remains illuminated after the engine 
is started.

8

The TCL/ASC indicator lamp remains illuminated after the engine 
is started.

9

When the TCL switch is push on, TCL system does not be 
cancelled.

10

P.35C-152

TCL/ASC system dose not operate.

11

P.35C-156

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-123

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication between Scan Tool and the TCL/ASC-ECU is not 
possible.

<LH drive vehicles>

IGNITION 
SWITCH (IG1)

DIAGNOSIS 
CONNECTOR

FRONT SIDE

POWER
SUPPLY

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

Data Link Connector Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-124

<RH drive vehicles>

TECHNICAL DESCRIPTION (COMMENT)

If the MUT-III can not communicate with the 
TCL/ASC system, the CAN bus lines may be 
defective. If the TCL/ASC system does not work, the 
TCL/ASC-ECU or its power supply circuit may be 
defective. 

PROBABLE CAUSES

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit (Integrated with 

TCL/ASC-ECU)

IGNITION 
SWITCH (IG1)

DIAGNOSIS 
CONNECTOR

POWER
SUPPLY

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

FRONT SIDE

Data Link Connector Circuit