Mitsubishi Galant 9G. Manual - part 1613

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-36

STEP 13. Check ABS-ECU connector A-02, intermediate 
connector C-25 and wheel speed sensor <Rear: RH> 
connector  F-04 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.
Q: Are ABS-ECU connector A-02, intermediate connector 

C-25 and wheel speed sensor <Rear: RH> connector 
F-04 damaged?
YES : Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 16.

NO :  Open or short circuit may be present in the rear right 

wheel speed sensor circuit. Repair the wiring harness 
between ABS-ECU connector A-02 (terminals 11 and 
17) and rear right wheel speed sensor F-04 (terminals 
1 and 2).Then go to Step 16.

AC207192

AC211230

19

2

18

1

8

9

7

6

5

4

3

10

11   

25

15

16

17

27

28

26

12

13

14

23

24

22 21 20

A-02(GR)

CONNECTOR: A-02

HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)

A-02 HARNESS CONNECTOR
(HARNESS SIDE)

AB

AC305231BM

CONNECTOR: C-25

C-25

11

1

4

3

10
16

13

12

5 6

2

14

8

15

9

7

AC305260

F-04

CONNECTOR: F-04

AF

F-04 HARNESS
CONNECTOR
(HARNESS SIDE)

1 2

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-37

STEP 14. Check ABS-ECU connector A-02, intermediate 
connector C-25 and wheel speed sensor <rear: LH> 
connector  F-07 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.
Q: Are ABS-ECU connector A-02, intermediate connector 

C-25 and wheel speed sensor <rear: LH> connector F-07 
damaged?
YES : Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 16.

NO :  Open or short circuit may be present in the rear left 

wheel speed sensor circuit. Repair the wiring harness 
between ABS-ECU connector A-02 (terminals 27 and 
28) and rear left wheel speed sensor F-07 (terminals 
2 and 1).Then go to Step 16.

AC306406

19

2

18

1

8

9

7

6

5

4

3

10

11   

25

15

16

17

27

28

26

12

13

14

23

24

22 21 20

A-02 HARNESS CONNECTOR
(HARNESS SIDE)

AB

A-02 (GR)

CONNECTOR: A-02

HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)

AC305231BM

CONNECTOR: C-25

C-25

11

1

4

3

10
16

13

12

5 6

2

14

8

15

9

7

AC305260

CONNECTOR: F-07

AG

F-07 HARNESS
CONNECTOR
(HARNESS SIDE)

1 2

F-07

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-38

STEP 15. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(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 C1201, C1206, C1211 or C1216 set?

YES : Replace the hydraulic unit (integrated with 

ABS-ECU). Then go to Step 16.

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 16. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(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 C1201, C1206, C1211 or C1216 set?

YES : Go to Step 1.
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-39

DTC C1226/C1231/C1236/C1241/C1246/C1251/C1256/C1261: ABS Solenoid Valve

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnostic trouble code may be set. 
Prior to this diagnosis, diagnose the CAN bus 
lines.

.

CIRCUIT OPERATION

• The ABS-ECU contains the power supply circuit 

(terminal 1) for the solenoid valve. The solenoid 
valve is energized by the valve relay, which is 
integrated in the ABS-ECU.

• The valve relay, which is integrated in the 

ABS-ECU, is always energizing the solenoid 
valve unless the initial check is in progress when 
the ignition switch is turned on.

• The ABS-ECU activates the solenoid valve by 

turning on its driving transistor.

.

ABS SOLENOID VALVE

HYDRAULIC UNIT

MOTOR

FUSIBLE 
LINK

MOTOR 
POWER 
SUPPLY

SOLENOID 
VALVE POWER 
SUPPLY

ABS-ECU

3

AC308173

AB

Solenoid Valve and Motor Power Supply Circuit

AC304742

A-02 (GR)

CONNECTOR: A-02

HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)

AC

AC305015AE

FUSIBLE LINK
No.3

RELAY BOX IN ENGINE COMPARTMENT