Mitsubishi Lancer Evolution IX. Manual — part 499

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-27

STEP 9. Check the following connectors.

•

Longitudinal G-sensor connector D-38

•

Intermediate connector C-122

•

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 10.

NO :

Repair it and then go to Step 11.

STEP 10. Check the following harness wire.

•

The wire between longitudinal G-sensor connector

D-38 (terminal 2) and ABS-ECU connector B-118
(terminal 25)

Q: Is the harness wire damaged?

YES :

Repair or replace it and then go to Step 11.

NO :

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

P.35B-143

). Then go to Step 11.

AC208854AE

Connector: D-38

D-38 (B)

Harness side

3

1

2

AC211265 DD

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

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

AC208854AE

Connector: D-38

D-38 (B)

Harness side

3

1

2

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

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-28

STEP 11. 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: Does diagnosis code No.32 reset?

YES :

Start over at Step 1.

NO :

The procedure is complete.

AC207179AB

M.U.T.-II

16-PIN

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

AC210056

AC

MB991911

16-PIN

MB991827

MB991824

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

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-29

Code No.41: Front Right Solenoid Valve inside Hydraulic Unit

Code No.42: Front Left Solenoid Valve inside Hydraulic Unit

Code No.43: Rear Right Solenoid Valve inside Hydraulic Unit

Code No.44: Rear Left Solenoid Valve inside Hydraulic Unit

Code No.52: Valve Relay Problem (Stays off)

Code No.53: Motor Relay Problem (Stays off)

Code No.55: Motor System (Seized Pump Motor)

OPERATION

Power is continuously supplied to the ABS-ECU
through fusible link number 3 to operate the solenoid
valve and motor.

DIAGNOSIS CODE SET CONDITIONS

These codes are displayed if the power supply circuit
of solenoid valve or motor is open or shorted.

PROBABLE CAUSES

The most likely causes for these diagnosis codes to
set are:

• Damaged wiring harness or connector

• Malfunction of the brake modulator hydraulic unit

(integrated with ABS-ECU)

SOLENOID
VALVE POWER
SUPPLY

MOTOR
POWER
SUPPLY

SOLENOID VALVE

MOTOR

HYDRAULIC UNIT

FUSIBLE
LINK

3

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

Solenoid Valve and Motor Power Supply Circuit

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-30

DIAGNOSIS

STEP 1. Check the solenoid valve or motor power
supply circuit. Voltage measurement at ABS-ECU
connector B-118.

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

measure at the harness side.

(2) Measure the voltage between terminal 11 and

earth, and 33 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Replace the brake modulator hydraulic unit

(integrated with ABS-ECU) (Refer to

P.35B-143

). Then go to Step 4.

NO :

Go to Step 2.

STEP 2. Check the following connectors.

•

ABS-ECU connector B-118

•

Intermediate connector A-12
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 3.

NO :

Repair it and then go to Step 4.

AC212153

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

Connector B-118
(Harness side)

AD

B-118 (B)

Connector: B-118

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

AC211262AY

Connector: A-12

A-12 (B)

1 2