Mitsubishi Galant (2004+). Manual - part 1519

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-17

STEP 4. Recheck for diagnostic trouble code.

Check again if the DTC is set.

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) Erase the DTC (Refer to 

P.13D-4

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Turn the ignition switch to the "ON" position.
(6) Check if the DTC is set.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
(8) Disconnect scan tool MB991958.
Q: Is DTC U1100 set?

YES : Replace the PCM [Refer to GROUP 13B, Power 

Control Module (PCM) 

P.13B-1146

]. 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.00-6

.

STEP 5. Recheck for diagnostic trouble code.

Check again if the DTC is set.

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) Erase the DTC (Refer to 

P.13D-4

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Turn the ignition switch to the "ON" position.
(6) Check if the DTC is set.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
(8) Disconnect scan tool MB991958.
Q: Is DTC U1100 set?

YES : Replace the hydraulic unit (integrated with 

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

P.35B-109

). 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.00-6

.

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-18

STEP 6. Recheck for diagnostic trouble code.

Check again if the DTC is set.

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) Erase the DTC (Refer to 

P.13D-4

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Turn the ignition switch to the "ON" position.
(6) Check if the DTC is set.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
(8) Disconnect scan tool MB991958.
Q: Is DTC U1100 set?

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

U1101 CAN Communications System Time Out Error A/T Related Data

CAUTION

• If DTC U1101 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 CONDITION
The ABS/TCL-ECU receives A/T system-related sig-
nals from the powertrain control module (PCM) via 
CAN bus lines.

.

TROUBLESHOOTING HINTS (The most likely 
causes for these DTCs are to set are:)

• Damaged harness or connector.

• Malfunction of the PCM.

• Malfunction of the ABS/TCL-ECU.

DIAGNOSIS

Required Special Tools:

• 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

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

13D-19

STEP 1. 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 

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 the CAN bus line found to be normal?

YES : Go to Step 2 .
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-14

). Then go to Step 6 .

STEP 2. 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 A/T system diagnostic trouble code (Refer to 

GROUP 23A, A/T Diagnosis - How to Read and Erase 
Diagnostic Trouble Code 

P.23A-15

).

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

YES : Repair the automatic transaxle control system. (Refer 

to GROUP 23A, A/T Diagnosis 

− Diagnostic Trouble 

Code Chart 

P.23A-43

). Then go to Step 6 .

NO :  Go to Step 3 .

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-20

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) Check if a DTC, which relates to CAN 

communication-linked systems below, is set.
ETACS-ECU

• DTC 012: Power train control module time-out 

(related to A/T)

Combination meter

• DTC 012: Power train control module time-out 

(related to A/T)

Multi-center display

• DTC 012: Power train control module time-out 

(related to A/T)

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is DTC 012 set?

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

STEP 4. Recheck for diagnostic trouble code.

Check again if the DTC is set.

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) Erase the DTC (Refer to 

P.13D-4

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Turn the ignition switch to the "ON" position.
(6) Check if the DTC is set.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
(8) Disconnect scan tool MB991958.
Q: Is DTC U1101 set?

YES : Replace the PCM [Refer to GROUP 13B, Power 

Control Module (PCM) 

P.13B-1146

]. 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.00-6

.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827