Mitsubishi Lancer Evolution IX. Manual — part 525
![](/vehicles/winoney/wruvea/ger/upocormet.png)
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-131
(3) Set M.U.T.-II/III to data reading mode for following
item.
• Item No.37: Steering wheel sensor neutral
position learning
OK:
Q: Is the steering wheel sensor straight ahead
position learning input normal?
YES :
Go to Step 5.
NO :
Confirm the steering wheel sensor is
correctly installed. Then go to Step 4.
STEP 4. Check for steering wheel sensor output
voltage.
(1) Connect steering wheel sensor connector C-230.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage, by backprobing, between
terminal 1 and earth, terminal 4 and earth, and
terminal 5 and earth.
OK: The voltage should measure as indi-
cated in the figure.
Q: Is the steering wheel sensor output voltage
normal?
YES :
Go to Step 13.
NO :
Replace the steering wheel sensor (Refer to
). and then go to Step 13.
STEP 5. Check the stop lamp.
Q: Does the stop lamp turn on and off normally?
YES :
Go to Step 9.
NO :
Go to Step 6.
STEP 6. Check the stop lamp switch installation
condition.
Q: Is the stop lamp switch installed correctly?
YES :
Check the stop lamp switch (Refer to
GROUP 35A, Brake pedal
). Then
go to Step 7.
NO :
Repair the installation of the stop lamp
switch (Refer to GROUP 35A, On-vehicle
Service
− Brake pedal Check and
Adjustment
). Then go to Step 13.
Checking requirement
Display
After driving straight at vehicle
speed over than 10 km/h
ON
Before driving with ignition switch
ON
OFF
AC311195AD
Connector: C-230
Connector C-230
(Harness side)
5 4
1
2
3
AC211894
Time
AB
Voltage
2.7 - 4.4 V
0.8 - 2.1 V
Variations in voltage when turning the
steering wheel
![](/vehicles/winoney/wruvea/ger/gte.png)
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-132
STEP 7. Check the following connectors.
•
Intermediate connectors C-129
•
Stop lamp switch connector C-102
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 13.
STEP 8. Check the following harness wires.
•
The wire between relay box in engine compartment
(fuse No.10) and stop lamp switch connector
C-102 (terminal 2)
• The wire between stop lamp switch connector
C-102 (terminal 1) and stop lamps
Q: Is any harness wire damaged?
YES :
Repair or replace it and then go to Step 13.
NO :
Go to Step 9.
AC311160AG
Connector: C-129
18
3
16
15
14
1 2
17
4 5
8
20
19
6 7
2122
9 10
25
13
24
23
12
11
AC311161AI
Connector: C-102
4
1
2
3
AC208825AN
Fuse: No.10
No.10
AC311161AI
Connector: C-102
4
1
2
3
![](/vehicles/winoney/wruvea/ger/fit.png)
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-133
STEP 9. Check the stop lamp switch circuit.
Voltage measurement at ABS-ECU connector
B-118.
(1) Disconnect ABS-ECU connector B-118 and
measure at the harness side.
(2) Depress the brake pedal to turn on the stop lamp
switch.
(3) Measure the voltage between terminal 19 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 10.
STEP 10. Check the following connectors.
•
ABS-ECU connector B-118
•
Joint connector C-105
• Intermediate connector C-124
•
Stop lamp switch connector C-102
AC311168
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)
AG
B-118 (B)
Connector: B-118
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
AC311207AB
Connectors: C-105, C-124
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
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-105
Connector C-124
AC311161AI
Connector: C-102
4
1
2
3
![](/vehicles/winoney/wruvea/ger/acantrea.png)
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-134
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 11.
NO :
Repair it and then go to Step 13.
STEP 11. Check the following harness wire.
The wire between stop lamp switch connector C-102
(terminal 1) and ABS-ECU connector B-118 (terminal
19)
Q: Is the harness wire damaged?
YES :
Repair or replace it and then go to Step 13.
NO :
Go to Step 13.
STEP 12. Check the following connector.
•
ABS-ECU connector B-118
Check the connector for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good
condition?
YES :
Replace the brake modulator hydraulic unit
(integrated with ABS-ECU) (Refer to
). Then go to Step 13.
NO :
Repair it and then go to Step 13.
STEP 13. Retest the system.
Q: Is the neutral position learning of the steering
wheel sensor detected by the ABS system?
YES :
The procedure is complete.
NO :
Return to Step 1.
INSPECTION PROCEDURE 7: Faulty ABS Operation
COMMENT ON TROUBLE SYMPTOM
(COMMENT)
The cause depends on driving and road surface con-
ditions, so diagnosis may be difficult. However, if no
diagnosis code is set, carry out the following inspec-
tion.
PROBABLE CAUSES
The most likely cause for this case is:
• Malfunction of the brake modulator hydraulic unit
DIAGNOSIS
Check the brake modulator hydraulic unit (Refer to
). If the brake modulator hydraulic unit
(integrated with ABS-ECU) is malfunctioning, replace
it. Then check that the malfunction symptom is elimi-
nated.
AC311161AI
Connector: C-102
4
1
2
3
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
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
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