Mitsubishi Galant (2004+). Manual — part 1517

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-9

NOTE: Since the TCL system is controlled with the same ABS/TCL-ECU used to control the ABS system, the
codes (with a *) used only for the ABS system also appear.
The inspection contents for the codes (with a *) used only for the ABS system do not described in this group.

C1256*

ABS rear left solenoid valve inlet valve

-

C1261*

ABS rear left solenoid valve outlet valve

-

C1266*

ABS hydraulic unit motor stuck

-

C1273*

ABS hydraulic unit motor drive circuit stuck off

-

C1274*

ABS hydraulic unit motor drive circuit stuck on

-

C1278*

ABS solenoid valve power circuit stuck off

-

C1279*

ABS solenoid valve power circuit stuck on

-

C1395*

Brake fluid filling incompleted

-

C1396

Engine torque intervention refusal

P.13D-10

C1397

Transmission range switch failure

P.13D-12

C1607

ABS/TCL-ECU failure

GROUP 35B,
Diagnostic Trouble
Code Procedures

P.35B-75

C1860

ABS/TCL-ECU power supply

Abnormal rise in voltage

GROUP 35B,
Diagnostic Trouble
Code Procedures

P.35B-77

C1861

ABS/TCL-ECU power supply

Abnormal drop in voltage

GROUP 35B,
Diagnostic Trouble
Code Procedures

P.35B-77

U1073

CAN communications system bus off

GROUP 35B,
Diagnostic Trouble
Code Procedures

P.35B-84

U1100

CAN communications system time out error engine related data

P.13D-14

U1101

CAN communications system time out error A/T related data

P.13D-18

U1120

CAN communications system TCL uncontrollable by engine
malfunction

P.13D-22

U1400

Dynamic range error APS1

P.13D-26

DTC

INSPECTION ITEM

DIAGNOSTIC CONTENT

REFERENCE PAGE

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

13D-10

DIAGNOSTIC TROUBLE CODE PROCEDURES

C1396 Torque Intervention Refusal

CAUTION

• If DTC C1396 is set in the ABS/TCL-ECU,

always diagnose the CAN main bus line. If
there is any fault in the CAN bus lines, an
incorrect DTC may be set.

• Whenever the ECU is replaced, ensure that

the communication circuit is normal.

.

DTC SET CONDITIONS
This DTC code is set when the refusal of torque
intervention request is sent from PCM.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• Malfunction of the MFI system.

• Malfunction of the CAN bus line.

• Malfunction of the ABS/TCL-ECU.

DIAGNOSIS

Required Special Tool:

• MB991958: Scan tool (MUT-III sub assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB cable

• MB991910: MUT-III main harness A

STEP 1. 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-4

).

(2) Turn the ignition switch to the "ON" position.
(3) Check for MFI system diagnostic trouble code (Refer to

GROUP 13B, MFI Diagnosis - How to Read and Erase
Diagnostic Trouble Code

P.13B-5

).

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

YES : Repair the MFI control system. (Refer to GROUP

13B, MFI Diagnosis

− Diagnostic Trouble Code Chart

P.13B-33

). Then go to Step 4 .

NO : Go to Step 2 .

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

13D-11

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

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-4

).

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line. (Refer to GROUP 54C,

Diagnostic Trouble Code Diagnosis - How to Diagnose the
CAN Bus Line

P.54C-12

).

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

YES : Repair the CAN bus line. (Refer to GROUP 54C, CAN

bus Diagnosis

− CAN Bus Diagnostic Table

P.54C-14

). Then go to Step 4 .

NO : Go to Step 3 .

STEP 3. 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-4

).

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

codes.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC C1396 set?

YES : Replace the hydraulic unit (integrated with

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

P.35B-109

). Then go to Step 4 .

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.00-6

).

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-12

STEP 4. 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-4

).

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

codes.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC C1396 set?

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

C1397 Transmission Range Switch Failure

CAUTION

• If DTC C1397 is set in the ABS/TCL-ECU,

always diagnose the CAN main bus line. If
there is any fault in the CAN bus lines, an
incorrect DTC may be set.

• Whenever the ECU is replaced, ensure that

the communication circuit is normal.

CAUTION

The A/T system-related DTC may be set when
DTC C1397 is set. (For details refer to GROUP 00,
Intersystem Affiliated DTC Reference Table

P.00-16

). Diagnose the A/T system first when the

A/T system-related DTC is set.

.

DTC SET CONDITIONS
This DTC code is set when the transmission range
switch fail request is sent from PCM.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• Malfunction of the A/T system.

• Malfunction of the ABS/TCL-ECU.

DIAGNOSIS

Required Special Tool:

• MB991958: Scan tool (MUT-III sub assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB cable

• MB991910: MUT-III main harness A

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827