Mitsubishi Lancer Evolution IX. Manual - part 515

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-91

STEP 7. Check the following connectors.

•

Diagnosis connector C-14

•

Joint connectors C-23, C-101, C-105

• Intermediate connector C-124

•

ABS-ECU connector B-118
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 9.

STEP 8. Check the following harness wires.

•

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

nal 2) and diagnosis connector C-14 (terminal 7)

• The wire between ABS-ECU connector B-118 

(terminal 5) and diagnosis connector C-14 (termi-
nal 1)

Q: Is any harness wire damaged?

YES : 

Repair or replace it and then go to Step 9.

NO : 

Replace the brake modulator hydraulic unit 
(integrated with ABS-ECU) (Refer to 

P.35B-143

). Then go to Step 9.

STEP 9. Retest the system.

Q: Does the M.U.T.-II/III communicate with the ABS 

system?
YES : 

The procedure is complete.

NO : 

Return to Step 1.

AC100188AG

C-14(B)

Connector: C-14

AC212218 AB

Connectors: C-23, C-101, C-105, C-124

C-101 (L)

C-23 (B)

C-105

C-124

33

22

11

28

17

16

15

14

13

12

25

2324

2627

3

1 2

4 5

21

20

19

18
2930

32

31

7

6

8

10

9

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

18

3

16

15

14

1 2

17

4 5

8

20

19

6 7

2122

9 10

25

13

24

23

12

11

Connector C-23

Connector C-101

Connector C-105

Connector C-124

AC211901AD

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

AC211901AD

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

AC100188AG

C-14(B)

Connector: C-14

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-92

INSPECTION PROCEDURE 3: When the Ignition Key is Turned to the "ON" position (Engine Stopped), 
the ABS Warning Lamp does not Illuminate.

OPERATION

• The ABS warning lamp power is supplied from 

the ignition switch. The ABS-ECU earths the cir-
cuit to illuminate the lamp.

• The ABS-ECU illuminates the ABS warning lamp 

for 3 seconds while running self-check. This lamp 
is illuminated for 3 seconds upon start-up or 
when the ignition switch is turned to the "ON" 
position with engine stopped.

IGNITION
SWITCH (IG1)

COMBINATION
METER

ABS-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

ABS Warning Lamp Circuit

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-93

• When the ABS-ECU connector is disconnected, 

the circuit is earthed to illuminate the lamp. 

• The ABS-ECU controls the continuity to the ABS 

warning lamp by turning the power transistor in 
the unit "OFF" and "ON," respectively.

COMMENT ON TROUBLE SYMPTOM

The cause may be an open circuit in the ABS warn-
ing lamp power supply circuit, a blown ABS warning 
lamp bulb, or a short circuit to earth between the 
ABS warning lamp and the ABS-ECU.

PROBABLE CAUSES

The most likely causes for this case are:

• Blown fuse

• Damaged wiring harness or connector

• Burnt out ABS warning lamp bulb

• Malfunction of the brake modulator hydraulic unit 

(integrated with ABS-ECU)

DIAGNOSIS

STEP 1. Check the ABS warning lamp circuit at 
ABS-ECU connector B-118.

(1) Disconnect ABS-ECU connector B-118.

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

Q: Does the ABS warning lamp illuminate?

YES : 

Replace the brake modulator hydraulic unit 

(integrated with ABS-ECU) (Refer to 

P.35B-143

). Then go to Step 10.

NO : 

Go to Step 2.

STEP 2. Check the power supply circuit. Voltage 
measurement at combination meter connector 
C-01.

(1) Disconnect combination meter connector C-01 

and measure at the harness side.

(2) Start the engine.
(3) Measure the voltage between terminal 9 and 

earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 3.

AC211901AD

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

AC212218 AC

Connector: C-01

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Connector C-01
(harness side)

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-94

STEP 3. Check the following connectors.

•

Combination meter connector C-01

•

Junction block connectors C-211, C-214

• Joint connector C-23

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 4.

NO : 

Repair it and then go to Step 10.

STEP 4. Check the following harness wire.

The wire between junction block connector C-211 
(terminal 6) and combination meter connector C-01 
(terminal 9)

Q: Is the harness wire damaged?

YES : 

Repair or replace it and then go to Step 10.

NO : 

Go to Step 10.

AC212218AE

Connectors: C-01, C-23

C-23 (B)

C-01

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Connector C-01
(harness side)

Connector C-23

AC212152AD

Connectors: C-211, C-214

C-211

C-214

Junction block
(Front view)

Connector C-211
(Harness side)

Connector C-214
(Harness side)

4

6 5

3

2

1

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

AC211269

Connector: C-211 

AL

Junction block
(Front view)

Harness side

4

6 5

3

2

1

AC211265DF

Connector: C-01

C-01

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Harness side