Mitsubishi Lancer Evolution IX. Manual - part 505

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-51

STEP 7. Check the following connectors.

•

ABS-ECU connector B-118

•

Intermediate connectors C-111, C-122 

•

Front wheel speed sensor (RH) connector A-27
Check the connectors for loose, corroded or dam-
aged terminals, or terminals pushed back in the con-
nector.

Q: Are the connectors and terminals in good 

condition?
YES : 

Go to Step 8.

NO : 

Repair it and then go to Step 15.

STEP 8. Check the following harness wires.

•

The wire between ABS-ECU connector B-118 (termi-

nal 29) and front wheel speed sensor (RH) con-
nector A-27 (terminal 1)

• The wire between ABS-ECU connector B-118 

(terminal 30) and front wheel speed sensor (RH) 
connector A-27 (terminal 2)

Q: Is any harness wire damaged?

YES : 

Repair or replace it and then go to Step 15.

NO : 

Go to Step 15.

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC311161AB

Connector: C-111

C-111

AC311160AC

Connector: C-122

C-122 (L)

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

AC211900 AC

Connector: A-27

A-27 (B)

1

2

Harness side

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC211899AC

Connector: A-03

A-03 (B)

1

2

Harness side

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-52

STEP 9. Check the following connectors.

•

ABS-ECU connector B-118

•

Intermediate connectors C-112, C-122, D-34 

•

Rear wheel speed sensor (LH) connector D-13
Check the connectors for loose, corroded or dam-
aged terminals, or terminals pushed back in the con-
nector.

Q: Are the connectors and terminals in good 

condition?
YES : 

Go to Step 10.

NO : 

Repair it and then go to Step 15.

STEP 10. Check the following harness wires.

•

The wire between ABS-ECU connector B-118 (termi-

nal 6) and rear wheel speed sensor (LH) connec-
tor D-13 (terminal 1)

• The wire between ABS-ECU connector B-118 

(terminal 7) and rear wheel speed sensor (LH) 
connector D-13 (terminal 2)

Q: Is any harness wire damaged?

YES : 

Repair or replace it and then go to Step 15.

NO : 

Go to Step 15.

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC311161AC

Connector: C-112

C-112 (RG)

AC311160AC

Connector: C-122

C-122 (L)

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

AC311162AB

Connector: D-34

D-34

AC311163AB

Connector: D-13

D-13

Harness side

1 2

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC311163AB

Connector: D-13

D-13

Harness side

1 2

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-53

STEP 11. Check the following connectors.

•

ABS-ECU connector B-118

•

Intermediate connectors C-112, C-122, D-34 

•

Rear wheel speed sensor (RH) connector D-06
Check the connectors for loose, corroded or dam-
aged terminals, or terminals pushed back in the con-
nector.

Q: Are the connectors and terminals in good 

condition?
YES : 

Go to Step 12.

NO : 

Repair it and then go to Step 15.

STEP 12. Check the following harness wires:

•

The wire between ABS-ECU connector B-118 (termi-

nal 8) and rear wheel speed sensor (RH) connec-
tor D-06 (terminal 1)

• The wire between ABS-ECU connector B-118 

(terminal 9) and rear wheel speed sensor (RH) 
connector D-06 (terminal 2)

Q: Is any harness wire damaged?

YES : 

Repair or replace it and then go to Step 15.

NO : 

Go to Step 15.

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC311161AC

Connector: C-112

C-112 (RG)

AC311160AC

Connector: C-122

C-122 (L)

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

AC311162AB

Connector: D-34

D-34

AC311163AC

Connector: D-06

D-06 (B)

Harness side

1 2

AC311127AB

B-118 (B)

Connector: B-118

28

32

34

12

11

33

30

21

9

10

22

31

7

8

29

20 19

24

2

26

4

5

6

27

18 17

3

25

16 15

1

23

13

14

Harness side

AC311163AC

Connector: D-06

D-06 (B)

Harness side

1 2

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-54

STEP 13. Measure the wheel speed sensor 
output voltage.
Refer to 

P.35B-138

.

Output Voltage:

• When measured with a voltmeter: 42 mV or more

• When measured with an oscilloscope (maximum 

voltage): 120 mV or more

Q: Does the voltage meet the specification?

YES : 

Replace the brake modulator hydraulic unit 

(integrated with ABS-ECU) (Refer to 

P.35B-143

). Then go to Step 15.

NO : 

Go to Step 14.

STEP 14. Check the wheel bearing.
Refer to GROUP 26, On-vehicle Service 

− Wheel 

Bearing End Play Check <Front>

P.26-6

 or GROUP 

27, On-vehicle Service 

− Wheel Bearing End Play 

Check <Rear>

P.27-30

. If play on the wheel bearing 

is not within the limit, replace the wheel bearing.

Limit: 0.05 mm (0.002 inch)

Q: Is play on the wheel bearing within the standard 

value?
YES : 

Go to Step 15.

NO : 

Replace it and then go to Step 15.

STEP 15. Check whether the diagnosis code is 
reset.

Check again if the diagnosis code is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF) 

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Do the diagnosis codes 11, 12, 13, 14, 21, 22, 23 or 

24 reset?
YES : 

Go to Step 1.

NO : 

The procedure is complete.

AC311157

Steering shaft

AB

MB991502

<Using the M.U.T.-II>

AC311153

AB

MB991911

16-PIN

MB991827

MB991824 

<Using the M.U.T.-III>