Mitsubishi Lancer Evolution IX. Manual - part 507

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-59

DIAGNOSIS

STEP 1. M.U.T.-II/III data list.

CAUTION

To prevent damage to M.U.T.-II/III, always turn the 
ignition switch to the "LOOK" (OFF) position 
before connecting or disconnecting M.U.T.-II/III.

(1) Connect M.U.T.-II/III as shown in the illustration.
(2) Start the engine.

(3) Set M.U.T.-II/III to data reading mode for following 

item.

• Item No.32: Longitudinal G-sensor

OK:

When vehicle is stationary (level): 2.4 

− 2.6 

V

When vehicle is being driven: 1.0 

− 4.0 V

Q: Is the longitudinal G-sensor input normal?

YES : 

This malfunction is intermittent. Refer to 

GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− 

How to Cope With Intermittent Malfunction 

P.00-5

. 

NO : 

Go to Step 2.

STEP 2. Check the power supply circuit. Voltage 
measurement at longitudinal G-sensor connector 
D-38.

(1) Disconnect connector D-38, and check at the 

harness side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and 

earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 4.

AC311157

Steering shaft

AB

MB991502

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

AC311153

AB

MB991911

16-PIN

MB991827

MB991824 

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

AC311166AB

Connector: D-38

D-38 (B)

Connector D-38
(Harness side)

3

1

2

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-60

STEP 3. Check the earth circuit. Resistance 
measurement at longitudinal G-sensor connector 
D-38.

(1) Disconnect connector D-38, and check at the 

harness side.

(2) Measure the resistance between terminal 3 and 

earth.

OK: 2 ohms or less

Q: Is the resistance 2 ohms or less?

YES : 

Go to Step 8.

NO : 

Go to Step 6.

STEP 4. Check the following connectors.

•

Longitudinal G-sensor connector D-38

•

Junction block connectors C-211, C-214
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 5.

NO : 

Repair it and then go to Step 11.

AC311166

AD

Connector D-38
(Harness side)

3

1

2

AC

Connector: D-38

D-38 (B)

AC311167AB

Connector: D-38

D-38 (B)

Harness side

3

1

2

AC311164

Connectors: C-211, C-214

C-214

C-211

AC

Junction block
(Front view)

4

6 5

3

2

1

Connector C-211
(Harness side)

Connector C-214
(Harness side)

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

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-61

STEP 5. Check the following harness wire.

The wire between longitudinal G-sensor connector 
D-38 (terminal 1) and junction block connector C-211 
(terminal 2)

Q: Is the harness wire damaged?

YES : 

Repair or replace it and then go to Step 11.

NO : 

Go to Step 11.

STEP 6. 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 7.

NO : 

Repair it and then go to Step 11.

AC311167AB

Connector: D-38

D-38 (B)

Harness side

3

1

2

AC311165

Connector: C-211 

AB

Junction block
(Front view)

Harness side

4

6 5

3

2

1

AC311167AB

Connector: D-38

D-38 (B)

Harness side

3

1

2

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

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

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-62

STEP 7. Check the following harness wire.

The wire between longitudinal G-sensor connector 
D-38 (terminal 3) and ABS-ECU connector B-118 
(terminal 15)

Q: Is the harness wire damaged?

YES : 

Repair or replace it and then go to Step 11.

NO : 

Go to Step 11.

STEP 8. Check longitudinal G-sensor output 
voltage.

(1) Disconnect connector D-38, and then connect 

special tool harness set (MB991348) between 
terminals of the disconnected connectors.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and 

earth.

OK: 

When the longitudinal G-sensor is placed 

on a level plane: 2.4 

− 2.6 volts

When the longitudinal G-sensor is placed 

with its label positioned as shown: 3.4 

− 

3.6 volts

Q: Is the longitudinal G-sensor output voltage 

normal?
YES : 

Go to Step 9.

NO : 

Replace the longitudinal G-sensor (Refer to 

P.35B-148

). Then go to Step 11.

AC311167AB

Connector: D-38

D-38 (B)

Harness side

3

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

AC103662AG

MB991348

Connector: D-38
(Harness side)

Label

Label