Mitsubishi Galant 9G. Manual — part 439

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-24

STEP 5. Using scan tool MB991958, read the diagnostic
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.

(Refer to

P.13D-3

).

(2) Turn the ignition switch to the "ON" position.
(3) Use scan tool MB991958 to read the TCL diagnostic trouble

codes. (Refer to

P.13D-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC U1120 set?

YES : Replace the hydraulic unit (integrated with

ABS/TCL-ECU). (Refer to GROUP 35B

− Hydraulic

Unit

P.35B-105

). 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.00-14

).

STEP 6. Using scan tool MB991958, read the diagnostic
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.

(Refer to

P.13D-3

).

(2) Turn the ignition switch to the "ON" position.
(3) Use scan tool MB991958 to read the TCL diagnostic trouble

codes. (Refer to

P.13D-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC U1120 set?

YES : Return to Step 1.
NO : The procedure is complete.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

13D-25

U1400 Dynamic range error APS1

.

DTC SET CONDITION

This code is set when the MFI system sets either of
DTCs P2138, P2122 or P2123.

.

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THESE DTCS ARE
TO SET ARE:)

• Malfunction of the MFI system

DIAGNOSIS

Check whether the MFI system sets either of diagnostic trouble
codes P2138, P2122 or P2123, and repair if necessary. (Refer
to GROUP 13B, MFI Diagnosis

− Diagnostic Function − How to

Read and Erase Diagnostic Trouble Code

P.13B-6

).

SYMPTOM CHART

M1136003400029

SYMPTOM

INSPECTION
PROCEDURE NO.

REFERENCE
PAGE

Communication with
scan tool is not
possible

Communication with all systems is
impossible

-

Group 13B, MFI
Diagnosis

−

Symptom
Procedures

−

Inspection
Procedure 1

P.13B-1013

.

Communication with the ABS/TCL-ECU
only is impossible

-

Group 35B, ABS
Diagnosis

−

Symptom
Procedures

−

Inspection
Procedure 1

P.35B-82

.

When the ignition switch is turned to the "ON" position (engine
stopped), the "TCL OFF" indicator light dose not illuminate.

1

P.13D-26

When the ignition switch is turned to the "ON" position (engine
stopped), the TCL work indicator light dose not illuminate.

2

The "TCL OFF" indicator light remains illuminated after the engine
is started.

3

The TCL work indicator light remains illuminated after the engine
is started.

4

When the TCL switch is push on, TCL does not be cancelled.

5

P.13D-31

TCL dose not operate.

6

P.13D-38

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

13D-26

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: When the Ignition Switch is Turned to the "ON" Position
(Engine Stopped), the "TCL OFF" Indicator Light dose not Illuminate. INSPECTION
PROCEDURE 2: When the Ignition Switch is Turned to the "ON" Position (Engine
Stopped), the TCL Work Indicator Light dose not Illuminate. INSPECTION
PROCEDURE 3: The "TCL OFF" Indicator Light Remains Illuminated After the Engine
is Started. INSPECTION PROCEDURE 4: The TCL Work Indicator Light Remains
Illuminated After the Engine is Started.

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-27

BATTERY

IGNITION SWITCH (IG1)

JOINT
CONNECTOR (1)

JOINT
CONNECTOR (3)

RELAY
BOX

JUNCTION
BLOCK

COMBINATION
METER

JOINT
CONNECTOR (4)

ABS/TCL-ECU

AC307013

"TCL OFF" Indicator Light and TCL Work Indicator Light Drive Circuit

AB