Mitsubishi 380. Manual — part 325

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-20

STEP 2. Using diagnostic tool MB991958, diagnose the
CAN bus line.

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link

connector. (Refer to

P.13C-3

).

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line. (Refer to

P.13C-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect diagnostic tool MB991958.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 3.
NO : Repair the CAN bus lines. (Refer to GROUP 54C,

Diagnosis

− Can Bus Diagnostic Chart

P.54C-15

).

Then go to Step 6.

STEP 3. Using diagnostic tool MB991958, read the
diagnostic trouble code.

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link

connector. (Refer to

P.13C-3

).

(2) Turn the ignition switch to the "ON" position.
(3) Check if a DTC, which relates to CAN

communication-linked systems below, is set.
A/C-ECU

• DTC U1120: Failure Information on Engine-ECU

(related to engine). (Refer to GROUP 55, Auto A/C
Diagnosis

− Diagnostic Function − How to Read and

Erase Diagnostic Trouble Code

P.55-6

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect diagnostic tool MB991958.

Q: Is DTC U1120 set?

YES : Go to Step 4.
NO : Go to Step 5.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-21

STEP 4. Using diagnostic tool MB991958, read the
diagnostic trouble code.

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link

connector. (Refer to

P.13C-3

).

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

trouble codes. (Refer to

P.13C-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect diagnostic tool MB991958.

Q: Is DTC U1120 set?

YES : Replace the Engine-ECU. [Refer to GROUP 13A,

Engine-ECU

P.13A-675

]. 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 5. Using diagnostic tool MB991958, read the
diagnostic trouble code.

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link

connector. (Refer to

P.13C-3

).

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

trouble codes. (Refer to

P.13C-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect diagnostic 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-93

). 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

).

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-22

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

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link

connector. (Refer to

P.13C-3

).

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

trouble codes. (Refer to

P.13C-3

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect diagnostic tool MB991958.

Q: Is DTC U1120 set?

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

U1400 Dynamic range error APS1

.

DTC SET CONDITION

This code is set when the MPI 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 MPI system

DIAGNOSIS

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

− Diagnostic Function − How to

Read and Erase Diagnostic Trouble Code

P.13A-6

).

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-23

SYMPTOM CHART

M1136003400029

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: When the Ignition Switch is Turned to the "ON" Position
(Engine Stopped), the "TCL OFF" Indicator Light does 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.

SYMPTOM

INSPECTION
PROCEDURE NO.

REFERENCE
PAGE

Communication with
diagnostic tool is not
possible

Communication with all systems is
impossible

-

Group 13A, MPI
Diagnosis

−

Symptom
Procedures

−

Inspection
Procedure 1

P.13A-539

.

Communication with the ABS/TCL-ECU
only is impossible

-

Group 35B, ABS
Diagnosis

−

Symptom
Procedures

−

Inspection
Procedure 1

P.35B-72

.

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

1

P.13C-23

When the ignition switch is turned to the "ON" position (engine
stopped), the TCL work indicator light does 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.13C-28

TCL dose not operate.

6

P.13C-34