Mitsubishi Galant (2004+). Manual - part 523

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-37

STEP 10. Measure the resistance at ABS-ECU connector 
A-02.

(1) Disconnect the connector A-02, and connect special tool 

ABS Check Harness (MB991970) to the wiring 
harness-side connector.
NOTE: Do not connect special tool ABS Check Harness 
(MB991970) to the ABS-ECU.

(2) Measure the resistance between the relevant signal and 

ground terminals in the wheel speed sensor circuit.

• DTC C1201 is set: Between signal terminal 9 and 

ground terminal 10

• DTC C1206 is set: Between signal terminal 26 and 

ground terminal 16

• DTC C1211 is set: Between signal terminal 11 and 

ground terminal 17

• DTC C1216 is set: Between signal terminal 28 and 

ground terminal 27

Standard Value: 1.24 

− 1.64 kΩ

Q: Is the resistance between terminals 16 and 26, 9 and 10, 

27 and 28, or 11 and 17 within the standard value?
YES (When resistances between all terminals are within 
the standard value) : Go to Step 15.
NO (When resistance between terminals 9 and 10 is not 
within the standard value) : Go to Step 11.
NO (When resistance between terminals 16 and 26 is not 
within the standard value) : Go to Step 12.
NO (When resistance between terminals 11 and 17 is not 
within the standard value) : Go to Step 13.
NO (When resistance between terminals 27 and 28 is not 
within the standard value) : Go to Step 14.

AC306403

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

AD

ABS-ECU

MB991970

CHECK CONNECTOR

A-02 HARNESS
CONNECTOR

A-02 (GR)

CONNECTOR: A-02

HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-38

STEP 11. Check ABS-ECU connector A-02 and wheel 
speed sensor <front: RH> connector A-01 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

Q: Are ABS-ECU connector A-02 and wheel speed sensor 

<front: RH> connector A-01 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 front right 

wheel speed sensor circuit. Repair the wiring harness 
between ABS-ECU connector A-02 (terminals 9 and 
10) and front right wheel speed sensor A-01 
(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)

AC305206

A-01 (B)

CONNECTOR: A-01

AV

A-01 HARNESS
CONNECTOR
(HARNESS SIDE)

2 1

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-39

STEP 12. Check ABS-ECU connector A-02 and wheel 
speed sensor <front: RH> connector A-04 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

Q: Are ABS-ECU connector A-02 and wheel speed sensor 

<front: LH> connector A-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 front right 

wheel speed sensor circuit. Repair the wiring harness 
between ABS-ECU connector A-02 (terminals 16 and 
26) and front left wheel speed sensor A-04 (terminals 
1 and 2).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)

AC305210AJ

A-04(B)

CONNECTOR: A-04

A-04 HARNESS
CONNECTOR
(HARNESS SIDE)

2 1

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-40

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)

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