Mitsubishi Grandis. Manual - part 946

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-109

STEP 5. Check whether the diagnosis code is 
reset.

Check again if the diagnosis code is set.

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

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

position.

(8) Disconnect MUT-III.

Q: Is code No.U1100 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU) (Refer to  

P.35B-77

). Then 

go to Step 6 .

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 6. Check whether the diagnosis code is 
reset.

Check again if the diagnosis code is set.

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

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

position.

(8) Disconnect MUT-III.

Q: Is code No.U1100 set?

YES : 

Return to Step 1 .

NO : 

The procedure is complete.

Code No.U1101 CAN communications system time out error A/T related data

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-110

CAUTION

• If diagnosis code No.U1101 is set in the 

TCL/ASC-ECU, always diagnose the CAN 
main bus line. If there is any fault in the CAN 
bus lines, an incorrect diagnosis code may be 
set.

• Whenever the ECU is replaced, ensure that 

the communication circuit is normal.

DIAGNOSIS CODE SET CONDITION

The TCL/ASC-ECU receives A/T system-related 
signals from the Engine-A/T-ECU via CAN bus lines.

PROBABLE CAUSES

• Damaged harness or connector.

• Malfunction of the Engine-A/T-ECU.

• Malfunction of the TCL/ASC-ECU.

DIAGNOSIS

STEP 1. MUT-III CAN bus diagnostics

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line. (Refer to GROUP 

54D, CAN bus line Diagnostic flow 

P.54D-9

).

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

position.

(5) Disconnect MUT-III.

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

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

P.54D-9

). Then go to Step 2.

STEP 2. MUT-III other system diagnosis code

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T system diagnosis code (Refer to 

GROUP 23A, A/T Diagnosis - Diagnosis Function 

P.23A-7

).

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

position.

(5) Disconnect MUT-III.

Q: Is any diagnosis code set?

YES : 

Repair the automatic transmission control 

system. (Refer to GROUP 23A, A/T 
Diagnosis - Check Chart For Diagnosis 
Codes 

P.23A-17

). Then go to Step 6 .

NO : 

Go to Step 3 .

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-111

STEP 3. MUT-III other system diagnosis code

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

(2) Turn the ignition switch to the "ON" position.
(3) Check if a diagnosis code, which relates to CAN 

communication-linked systems below, is set.
ETACS-ECU

• Code No.012: Power train control module 

time-out (related to A/T)

Combination meter

• Code No.012: Power train control module 

time-out (related to A/T)

Centre display unit

• Code No.012: Power train control module 

time-out (related to A/T)

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

position.

(5) Disconnect MUT-III.

Q: Is code No.012 set?

YES : 

Go to Step 4 .

NO : 

Go to Step 5 .

STEP 4. 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) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

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

(3) Erase the diagnosis code (Refer to 

P.35C-6

).

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

position.

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

position.

(8) Disconnect MUT-III.

Q: Is code No.U1101 set?

YES : 

Replace the Engine-A/T-ECU [Refer to 

GROUP 13A Engine-ECU-and 
Engine-A/T-ECU 

P.13A-399

]. Then go to 

Step 6.

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

.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-112

STEP 5. Check whether the diagnosis code is 
reset.

Check again if the diagnosis code is set.

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

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

(3) Erase the diagnosis code (Refer to 

P.35C-6

).

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

position.

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

position.

(8) Disconnect MUT-III.

Q: Is code No.U1101 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU) (Refer to  

P.35C-165

). 

Then go to Step 6 .

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 6. Check whether the diagnosis code is 
reset.

Check again if the diagnosis code is set.

CAUTION

To prevent damage to MUT-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-III.
(1) Connect the MUT-III to the diagnosis connector 

as shown in the illustration.

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

(3) Erase the diagnosis code (Refer to 

P.35C-6

).

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

position.

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

position.

(8) Disconnect MUT-III.

Q: Is code No.U1101 set?

YES : 

Return to Step 1 .

NO : 

The procedure is complete.

Code No.U1104: SAS CAN Timeout/Not equipped

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824