Mitsubishi Galant. Manual — part 531

GENERAL INFORMATION

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-5

(2) Pressure holding mode

If the ABS-ECU determines that the fluid pressure
has been increased to the optimum level, it stops
supplying power to the motor and the TCL solenoid
valve (IN). This causes the pump to stop its
operation and the TCL solenoid valve (IN) to close.
As a result, the fluid pressure in the wheel cylinder is
retained.

(3) Pressure reducing mode

AC003741

ABS SOLENOID
VALVE OUT

RESERVOIR

ABS SOLENOID
VALVE IN

WHEEL CYLINDER

CHECK VALVE (2)

CHECK VALVE (1)

TCL SOLENOID
VALVE OUT

MASTER CYLINDER

TCL SOLENOID
VALVE IN

PUMP AND
MOTOR
UNIT

AB

OUTLET VALVE

INLET
VALVE

COMPONENT

CURRENT
SUPPLY

VALVE
POSITION

COMPONENT

CURRENT
SUPPLY

VALVE
POSITION

ABS solenoid
valve

IN

OFF

Open

TCL solenoid
valve

IN

OFF

Closed

OUT

OFF

Closed

OUT

ON

Closed

AC003742

ABS SOLENOID
VALVE OUT

RESERVOIR

ABS SOLENOID
VALVE IN

WHEEL CYLINDER

CHECK VALVE (2)

CHECK VALVE (1)

TCL SOLENOID
VALVE OUT

MASTER CYLINDER

TCL SOLENOID
VALVE IN

PUMP AND
MOTOR
UNIT

AB

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-6

If the ABS-ECU determines that wheel slipping has
been prevented, it commands the TCL solenoid
valve (OUT) to open. This causes the fluid in the
wheel cylinder to flow through the ABS solenoid
valve (IN), check valve (2) and TCL solenoid valve
(OUT) back to the master cylinder, reducing the fluid
pressure in the brake circuit.

TR A C TIO N C O N TR O L SYSTEM (TC L) D IA G N O SIS

TCL Diagnostic Trouble Code Detection Conditions

M1354003500026

TCL diagnostic trouble codes (TCL DTCs) are set
under different conditions, depending on the
malfunction detected. Most TCL DTCs will only be
set during vehicle operation. Some TCL DTCs will
also be set during the TCL self-check immediately
after the engine is started. When you check if an TCL
DTC will be displayed again after the DTC has been

erased, you should recreate the TCL DTC set
conditions. Depending on the detection timing and
set conditions for the specific TCL DTC, you must
either drive the vehicle or turn the engine off and
restart it. To set the proper conditions for that DTC
again, refer to "TCL DTC SET CONDITIONS" for
each TCL DTC that you are trying to reset.

TCL DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1354000400020

Refer to GROUP 35B, Diagnosis

−

ABS Diagnostic

Troubleshooting Strategy

P.35B-3

.

COMPONENT

CURRENT
SUPPLY

VALVE
POSITION

COMPONENT

CURRENT
SUPPLY

VALVE
POSITION

ABS solenoid
valve

IN

OFF

Open

TCL solenoid
valve

IN

OFF

Closed

OUT

OFF

Closed

OUT

OFF

Open

AC003743

ABS SOLENOID
VALVE OUT

RESERVOIR

ABS SOLENOID
VALVE IN

WHEEL CYLINDER

CHECK VALVE (2)

CHECK VALVE (1)

TCL SOLENOID
VALVE OUT

MASTER CYLINDER

TCL SOLENOID
VALVE IN

PUMP AND
MOTOR
UNIT

AB

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-7

TCL TROUBLE CODE DIAGNOSIS

M1354000500038

Retrieving TCL Diagnostic Trouble Codes

Using Scan Tool MB991502

Required Special Tool:

•

MB991502: Scan Tool (MUT-II)

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOOK" (OFF) position before
connecting or disconnecting the scan tool.
1. Connect scan tool MB991502 to the data link connector.

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

3. Use scan tool MB991502 to check for TCL diagnostic

trouble codes.

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

5. Disconnect scan tool MB991502.
Using the ABS Warning Light and Special Tool MB991529

NOTE: The TCL system is controlled by the ABS-ECU. TCL
diagnostic trouble codes are also indicated by flashing of the
ABS warning light.

Required Special Tool:

•

MB991529: Diagnostic Trouble Code Check Harness

1. Use special tool MB991529 to ground number 1 terminal of

the data link connector.

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

3. Read out a diagnostic trouble code by observing how the

warning light flashes.

4. Disconnect special tool MB991529.

AC003081 AB

16 PIN

MB991502

AC003716 AB

DATA LINK
CONNECTOR

MB991529

AC003708 AB

ABS WARNING LIGHT

WHEN THE DIAGNOSTIC TROUBLE CODE NO.24
IS OUTPUT

WHEN NO DIAGNOSTIC TROUBLE CODE IS
OUTPUT

ACX01777

ILLUMINATED

SWITCHED
OFF

PAUSE
TIME 3s

TENS
SIGNAL

PLACE
DIVISION
2s

UNITS
SIGNAL

1.5s

0.5s

0.5s

AB

ACX01778

ILLUMINATED

SWITCHED
OFF

0.25s

AB

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-8

Erasing TCL Diagnostic Trouble Codes

Using Scan Tool MB991502

Required Special Tool:

•

MB991502: Scan Tool (MUT-II)

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOOK" (OFF) position before
connecting or disconnecting the scan tool.
1. Connect scan tool MB991502 to the data link connector.

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

3. Use scan tool MB991502 to erase ABS diagnostic trouble

codes.

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

5. Disconnect scan tool MB991502.
Using the Special Tool MB991529

Required Special Tool:

•

MB991529: Diagnostic Trouble Code Check Harness

1. Use special tool MB991529 to ground number 1 terminal of

the data link connector.

NOTE: If the ABS-ECU functions have stopped due to the
fail-safe function, the diagnostic code cannot be erased.

2. Depress the brake pedal and hold it.

3. Turn the ignition switch to the "ON" position.

4. After turning the ignition switch to the "ON", release the

pedal within three seconds. Repeat this process of pressing
and releasing the brake pedal 10 continuous times.

5. Turn the ignition switch to the "LOCK" (OFF) position.

6. Disconnect special tool MB991529.

AC003081 AB

16 PIN

MB991502

AC003716 AB

DATA LINK
CONNECTOR

MB991529

AC000937

IGNITION SWITCH

ON

OFF

STOPLIGHT SWITCH

ON

OFF

ABS WARNING LIGHT

ON

OFF

DIAGNOSTIC TROUBLE
CODE MEMORY

3 s

WITHIN
3 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

WITH-
IN 1 s

1 s

1 s

ERASING
COMPLETED

AB

1ST

2ND

3RD

4TH

5TH

6TH

7TH

8TH

9TH

10TH