Mitsubishi Grandis. Manual - part 956

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-149

(2) Connect MUT-III to the 16-pin diagnosis 

connector.

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

position.

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

position.

Q: Is code No.C1864 set? 

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU). Then go to Step 8.

NO : 

The procedure is complete.

STEP 8. MUT-III diagnosis code

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 set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1864 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU). Then go to Step 9.

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 9. MUT-III diagnosis code

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 set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1864 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-150

INSPECTION PROCEDURE 6: When the Ignition Switch is Turned to the "ON" Position (Engine 
Stopped), the "TCL OFF" Indicator Lamp does not Illuminate. 
INSPECTION PROCEDURE 7: When the Ignition Switch is Turned to the "ON" Position (Engine 
Stopped), the TCL Indicator Lamp does not Illuminate. 
INSPECTION PROCEDURE 8: The "TCL OFF" Indicator Lamp Remains Illuminated After the Engine is 
Started. 
INSPECTION PROCEDURE 9: The TCL Indicator Lamp Remains Illuminated After the Engine is 
Started.

OPERATION

• TCL/ASC-ECU send the illumination signal of 

"TCL OFF" indicator lamp and TCL indicator lamp 
to the combination meter via the CAN 
communication.

• TCL/ASC-ECU operates the "TCL OFF" indicator 

lamp and the TCL indicator lamp for three 
seconds after the ignition switch is turned "ON" 
position for bulb check.

COMMENT

This may be caused by faults in the CAN bus line, 
the combination meter or the TCL/ASC-ECU.

PROBABLE CAUSES

• Malfunction of the combination meter

• Damaged harness, connector

• Malfunction of the TCL/ASC-ECU

DIAGNOSIS

STEP 1. MUT-III CAN bus diagnostics
Use MUT-III to diagnose the CAN bus lines.

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 2

NO : 

Repair the CAN bus lines. (Refer to GROUP 
54D, Diagnosis-Can Bus Diagnostic Chart 

P.54D-16

). Then go to Step 4.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-151

STEP 2. MUT-III diagnosis code

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 any diagnosis code set?

YES : 

Refer to 

P.35C-6

, Diagnosis Code Chart. 

Then go to Step 4 .

NO : 

Go to Step 3.

STEP 3. MUT-III other system diagnosis code

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) Check for Combination meter system diagnosis 

code. 

(4) Turn the ignition switch to the "LOCK" (OFF) 

position.

(5) Disconnect MUT-III.

Q: Is code No.U1102 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU). Then go to Step 4.

NO : 

Replace the combination meter assembly. 
(Refer to GROUP 54A, Combination Meter 
Assembly 

P.54A-84

). Then go to Step 4.

STEP 4. Retest the system

Q: Turn the ignition switch to the "ON" position. Do 

the "TCL OFF" indicator lamp and the TCL 
indicator lamp illuminate for three seconds, and 
then go out after the engine starts?
YES : 

The procedure is complete.

NO : 

Return to Step 1.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-152

INSPECTION PROCEDURE 10: When the TCL Switch is Push On, TCL System does not Cancelled.

<LH drive vehicles>

TCL OFF 
SWITCH

COMBINATION
METER

TCL/ASC-ECU

FRONT-ECU
TAIL LAMP 
RELAY

RELAY 
BOX

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

TCL Switch Circuit