Mitsubishi Galant (2004+). Manual - part 531

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-69

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

(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-14

). Then go to Step 2.

STEP 2. Recheck for 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) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1395 set?

YES : Go to Step 3.
NO :  The procedure is complete.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-70

STEP 3. Check the brake warning light.

Check that the brake warning light illuminates with the parking 
brake lever pulled up.
Q: Does the brake warning light illuminate?

YES : Go to Step 4.
NO :  Replace the hydraulic unit (integrated with 

ABS-ECU). Then go to Step 11.

STEP 4. Check the brake fluid amount.
Q: Is the brake fluid within lower and upper limits?

YES : Go to Step 5.
NO :  Set the brake fluid within lower and upper limits. Then 

go to Step 11.

STEP 5. Check the brake warning light.

(1) Disconnect brake fluid level switch connector B-07 and 

parking brake switch connector C-18.

(2) Turn the ignition switch to the "ON" position.
Q: Does the brake warning light illuminate?

YES : Go to Step 6.
NO :  Check the brake fluid level switch (Refer to GROUP 

35A, On-vehicle service 

− Brake fluid level switch 

check 

P.35A-18

) and parking brake switch (Refer to 

GROUP 36, On-vehicle service 

− Parking brake 

switch check 

P.36-5

), and replace them if necessary. 

Then go to Step 11.

STEP 6. Measure the resistance at combination meter 
connector C-101.

(1) Disconnect the connector C-101
(2) Measure the resistance between terminal 7 and ground. 

Check that the continuity does not exist. 

Q: Does the continuity exist?

YES : Go to Step 7.
NO :  Replace the combination meter (integrated with meter 

ECU). Then go to Step 11    .

AC305233

CONNECTOR: C-18

CT

C-18 (B)

C-18 HARNESS
CONNECTOR

AC305232

CONNECTOR: C-101

BC

C-101

C-101 HARNESS
CONNECTOR
(HARNESS SIDE)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-71

STEP 7. Check intermediate connector A-13 and C-29, 
brake fluid level switch connector B-07, joint connector 
C-01, combination meter connector C-101 and parking 
brake switch connector C-18 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

AC305210

CONNECTOR: A-13

AV

A-13 (GR)

AC305229 AH

B-07 (GR)

CONNECTOR: B-07

AC305232

CONNECTORS: C-01, C-29, C-101

BD

C-101

C-01

C-29

C-01

C-29

C-101

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-72

Q: Is intermediate connector A-13 and C-29, brake fluid 

level switch connector B-07, joint connector C-01, 
combination meter connector C-101 and parking brake 
switch connector C-18 damaged?
YES : Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 11.

NO :  Go to Step 8.

STEP 8. Check the harness wires between joint connector 
C-01 (terminal 28) and parking brake switch connector 
C-18 (terminal 1).

Q: Is the harness wires between joint connector C-01 

(terminal 28) and parking brake switch connector C-18 
(terminal 1) damaged?
YES : Repair the wiring harness. Then go to Step 11.
NO :  Go to Step 9.

AC305233

CONNECTOR: C-18

CT

C-18 (B)

C-18 HARNESS
CONNECTOR

AC305231

CONNECTOR: C-01

DH

C-01

AC305233

CONNECTOR: C-18

CU

C-18 (B)

C-18 HARNESS
CONNECTOR
(HARNESS SIDE)