Mitsubishi Grandis. Manual - part 951

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-129

INSPECTION PROCEDURE 3: TCL/ASC-ECU power supply supply system

<LH drive vehicles>

IGNITION
SWITCH (IG1)

TCL/ASC-ECU

POWER
SOURCE

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/ASC-ECU Power Supply and Ground Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-130

<RH drive vehicles>

OPERATION

• The TCL/ASC-ECU is energized by the ignition 

switch (IG1) through multi-purpose fuse 2 and the 
TCL/ASC-ECU terminal 16.

• If the power supply to the TCL/ASC-ECU has 

failed, MUT-III will not be able to communicate 
with it.

PROBABLE CAUSES

• Damaged wiring harness or connector

• Defective battery

• Charging system failed

• Malfunction of the hydraulic unit (integrated with 

TCL/ASC-ECU)

IGNITION
SWITCH (IG1)

TCL/ASC-ECU

POWER
SOURCE

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/ASC-ECU Power Supply and Ground Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-131

DIAGNOSIS

STEP 1. Voltage measurement at TCL/ASC-ECU 
connector A-04.

(1) Disconnect the connector A-04, and connect 

special tool ABS Check Harness (MB991997) to 
the wiring harness-side connector.
NOTE: Do not connect special tool ABS Check 
Harness (MB991997) to the TCL/ASC-ECU.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 4 and 

earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 2.

AC312620AP

Oil reservoir

Connector: A-04

TCL/ASC-ECU

MB991997

Check connector

A-04 Harness connector

A-04

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

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-132

STEP 2. Check the following connectors.

•

TCL/ASC-ECU connector A-04

•

Junction block connectors C-202 and C-203

AC312621

Oil reservoir

Connector: A-04

AB

A-04

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

A-04 Harness connector
(harness side)

AC313139

AB

C-203

Connectors: C-202, C-203
<L.H.drive vehicles>

C-202

C-202

C-203

1

3 4

2

6

5

6

1

7

2

9

8

10

3

5

12

11

4

1314

Junction block
(Front view)

AC313140

AB

C-203

Connectors: C-202, C-203
<R.H.drive vehicles>

C-202

C-202

C-203

1

3 4

2

6

5

6

1

7

2

9

8

10

3

5

12

11

4

1314

Junction block
(Front view)