Mitsubishi Galant. Manual — part 537

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-29

STEP 2. Check the harness wires between ABS-ECU
connector A-03 and TCL indicator light connector C-29.
Q: Are any harness wires between ABS-ECU connector A-

03 and TCL indicator light connector C-29 damaged?
YES : Repair them and then go to Step 3.
NO : Go to Step 3.

STEP 3. Check symptom

Q: Does the TCL indicator light turn off 3 seconds after

startup?
YES : This diagnosis is complete.
NO : Return to Step 1.

INSPECTION PROCEDURE 5: The TCL warning light remains illuminated after the engine is started

NOTE: This diagnosis procedure is limited to cases where communication with the scan tool is possible
(ABS-ECU power supply is normal) and no diagnostic trouble code outputs.

AC003695 AB

CONNECTOR: A-03

AC005076AB

CONNECTOR: C-29

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-30

AC003726

TCL Werning Light Circuit

AB

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-31

CIRCUIT OPERATION

•

The ABS-ECU controls the illumination of the
TCL warning light by turning it "ON" and "OFF."

•

The ABS-ECU illuminates the TCL warning light
on startup. If turns the light off after 3 seconds
when the ABS-ECU completes the self-check.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably hydraulic unit (integrated with
ABS-ECU) malfunction.

TROUBLESHOOTING HINTS

•

Damaged wiring harness

•

Malfunction of the hydraulic unit (integrated with
ABS-ECU)

DIAGNOSIS

Required Special Tool:

•

MB991223: Harness Set

STEP 1. Check the power supply circuit at ABS-ECU
connector A-03.
(1) Disconnect ABS-ECU connector A-03.
(2) Turn the ignition switch to the "ON" position.

Q: Does the TCL warning light illuminate?

YES : Go to Step 2.
NO : Replace the hydraulic unit (integrated with ABS-ECU)

and then go to Step 3.

AC003695 AB

CONNECTOR: A-03

AC003082 AM

CONNECTORS: C-73, C-78

C-73

C-78

JUNCTION BLOCK
(FRONT VIEW)

AC005076AB

CONNECTOR: C-29

AC005077AB

CONNECTOR: C-12

AC003695 AB

CONNECTOR: A-03

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-32

STEP 2. Check the harness wire between ABS-ECU
connector A-03 and TCL warning light connector C-101.
Q: Are any harness wires between ABS-ECU connector A-

02 and TCL indicator light connector C-29 damaged?
YES : Repair them and then go to Step 3.
NO : Go to Step 3.

STEP 3. Check symptoms

Q: Does the TCL warning light turn off 3 seconds after

startup?
YES : This diagnosis is complete.
NO : Return to Step 1.

INSPECTION PROCEDURE 6: The TCL system does not operate.

TECHNICAL DESCRIPTION (COMMENT)
The cause depends on driving and road surface
conditions, so diagnosis may be difficult. However, if
no diagnostic trouble code is displayed, carry out the
following inspection.

TROUBLESHOOTING HINTS
Malfunction of the hydraulic unit

DIAGNOSIS

Check the hydraulic unit.

•

Refer to

P.35C-37

. If the hydraulic unit (integrated with

ABS-ECU) is malfunctioning, replace it. Then check that the
malfunction symptom is eliminated.

AC003695 AB

CONNECTOR: A-03

AC005076AB

CONNECTOR: C-29