Mitsubishi Grandis. Manual - part 940

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-85

STEP 4. 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) Turn the steerng wheel full left and right.
(6) Check if the diagnosis code is set.
(7) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1505 or C1506 set?

YES : 

<C1505 is set> Go to Step 5. <C1506 is 

set> Check the steering wheel sensor 
diagnosis code, and diagnose the diagnosis 
code.

NO : 

The procedure is complete.

STEP 5. Check whether the diagnosis code is 
reset.

CAUTION

Before connecting or disconnecting the MUT-III, 
turn the ignition switch to the "LOCK" (OFF) 
position.
Replace the steering sensor, and check whether 
diagnosis code No.C1505 or C1506 is reset.
(1) Replace the steering sensor.
(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.C1505 set? 

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU). Then go to Step 7.

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-86

STEP 6. 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) Turn the steerng wheel full left and right.
(6) Check if the diagnosis code is set.
(7) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1505 or C1506 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU). <C1505 is set> Then go to 
Step 7. <C1506 is set> Check the steering 
wheel sensor diagnosis code, and diagnose 
the diagnosis code.

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 7. 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) Turn the steerng wheel full left and right.
(6) Check if the diagnosis code is set.
(7) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1505 or C1506 set?

YES : 

Go to Step 1.

NO : 

The procedure is complete.

Code No.C1607: Trouble in TCL/ASC-ECU

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-87

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnosis code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the 
CAN bus lines are normal.

DIAGNOSIS CODE SET CONDITIONS

The TCL/ASC-ECU always monitors itself while the 
system is working. If the ECU detects any faults, it 
will set this diagnosis code.

PROBABLE CAUSES

• 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 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 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 code No.C1607 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU).

NO : 

The procedure is complete.

Code No.C1640: Incorrectly installed TCL/ASC-ECU

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-88

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnosis code may be set. Prior to this 
diagnosis, diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the 
CAN bus lines are normal.

DIAGNOSIS CODE SET CONDITIONS

The TCL/ASC-ECU always monitors itself while the 
system is working. If the ECU detects any faults, it 
will set this diagnosis code.

PROBABLE CAUSES

• A different hydraulic unit is used. (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 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 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 code No.C1640 set?

YES : 

Replace the hydraulic unit (integrated with 

TCL/ASC-ECU).

NO : 

The procedure is complete.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824