Mitsubishi Lancer Evolution IX. Manual — part 522
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-119
• 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
). 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.
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
AC311206AB
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-120
STEP 3. Check the following connectors.
•
Combination meter connector C-01
•
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 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.
AC311161
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)
AD
Connector: C-01
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
AC311165
Connector: C-211
AB
Junction block
(Front view)
Harness side
4
6 5
3
2
1
AC311161
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)
AD
Connector: C-01
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-121
STEP 5. Check the earth circuit. Resistance
measurement at combination meter connector
C-02.
(1) Disconnect combination meter connector C-02
and measure at the harness side.
(2) Measure the resistance between terminal 48 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 6. Check the following connector.
•
Combination meter connector C-02
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 :
Go to Step 7.
NO :
Repair it and then go to Step 10.
STEP 7. Check the following harness wire.
The wire between combination meter connector C-02
(terminal 48) and earth (No.7)
Q: Is the harness wire damaged?
YES :
Repair or replace it and then go to Step 10.
NO :
Go to Step 10.
AC311206AC
Connector: C-02
Connector C-02
(harness side)
31
43
37
34
32
33
35
36
40
38
39
41
42
48
44
45
4746
515049
C-02 (L)
AC311161
Connector: C-02
AH
Connector C-02 (harness side)
31
43
37
34
32
33
35
36
40
38
39
41
42
48
44
45
4746
515049
C-02 (L)
AC311161
Connector: C-02
AH
Connector C-02 (harness side)
31
43
37
34
32
33
35
36
40
38
39
41
42
48
44
45
4746
515049
C-02 (L)
AC311200AB
Earth
Windshield
wiper arm
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-122
STEP 8. Check the following connectors.
•
Combination meter connector C-01
•
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 9.
NO :
Repair it and then go to Step 10.
STEP 9. Check the following harness wire.
The wire between combination meter connector C-01
(terminal 13) and ABS-ECU connector B-118 (termi-
nal 27)
Q: Is the harness wire damaged?
YES :
Repair or replace it and then go to Step 10.
NO :
Replace the combination meter (Refer to
GROUP 54A, Combination Meter Assembly
). Then go to Step 10.
STEP 10. Retest the system.
Q: Does the ABS warning lamp illuminate for 3
seconds when the ignition switch is turned to the
"ON" position with engine stopped or upon
start-up?
YES :
The procedure is complete.
NO :
Return to Step 1.
AC311161
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)
AD
Connector: C-01
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
AC311161
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)
AD
Connector: C-01
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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