Mitsubishi Lancer Evolution IX. Manual — part 498

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-23

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 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.

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>

AC212253AB

Connector: D-38

D-38 (B)

Connector D-38
(Harness side)

3

1

2

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-24

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.

AC212253

AD

Connector: D-38

D-38 (B)

Connector D-38
(Harness side)

3

1

2

AC

AC208854AE

Connector: D-38

D-38 (B)

Harness side

3

1

2

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

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-25

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-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 7.

NO :

Repair it and then go to Step 11.

AC208854AE

Connector: D-38

D-38 (B)

Harness side

3

1

2

AC211269

Connector: C-211

AL

Junction block
(Front view)

Harness side

4

6 5

3

2

1

AC208854AE

Connector: D-38

D-38 (B)

Harness side

3

1

2

AC211265

Connector: C-124

AR

18

3

16

15

14

1 2

17

4 5

8

20

19

6 7

2122

9 10

25

13

24

23

12

11

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-26

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.

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

AC103662AG

MB991348

Connector: D-38
(Harness side)

Label

Label