Mitsubishi Lancer Evolution 7. Manual — part 317
ABS <4WD> -
Troubleshooting
35B-7
INSPECTION CHART FOR DIAGNOSIS CODES
Diagnosis code No.
Inspection item
Reference page
11
Front right wheel speed sensor (Open circuit or short circuit)
35B-9
12
Front left wheel speed sensor (Open circuit or short circuit)
13
Rear right wheel speed sensor (Open circuit or short circuit)
14
Rear left wheel speed sensor (Open circuit or short circuit)
16*
ABS-ECU power supply system (Abnormal voltage drop or rise)
35B-10
21
Front right wheel speed sensor
35B-9
22
Front left wheel speed sensor
23
Rear right wheel speed sensor
24
Rear left wheel speed sensor
32
Longitudinal G sensor system
35B-11
41
Front right solenoid valve
The diagnosis codes are output
when there is no response to the
35B-12
42
Front left solenoid valve
when there is no response to the
drive signals for respective solenoid
valves or the ABS ECU power
43
Rear right solenoid valve
valves or the ABS-ECU power
supply system is defective.
44
Rear left solenoid valve
51
Valve relay problem (stays on)
35B-30, 31
(Replace the
hydraulic unit and
ABS-ECU.)
52
Valve relay problem (stays off) or ABS-ECU power supply system
problem
35B-12
53
Motor relay problem (stays off) or ABS-ECU power supply system
problem
54
Motor relay problem (stays on)
35B-30, 31
(Replace the
hydraulic unit and
ABS-ECU.)
55
Motor system (seized pump motor) or ABS-ECU power supply system
problem
35B-12
63
ABS-ECU
35B-30, 31
(Replace the
hydraulic unit and
ABS-ECU.)
71
Lateral G sensor system
35B-13
ABS <4WD> -
Troubleshooting
35B-8
Diagnosis code No.
Reference page
Inspection item
81
Steering wheel sensor (ST-1) system (Open circuit or short circuit)
35B-14
82
Steering wheel sensor (ST-2) system (Open circuit or short circuit)
83
Steering wheel sensor (ST-N) system (Open circuit or short circuit)
NOTE: diagnosis code No.16, 52, 63
1. Code No. 16 is cleared from the memory by turning the ignition switch to ACC position. When the system
is properly reset, this code is also cleared from the memory.
2. Code No. 52 and 63 are cleared from the memory by turning the ignition switch to ACC position.
ABS <4WD> -
Troubleshooting
35B-9
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code Nos.11, 12, 13 and 14 Wheel speed sensor
(open circuit or short circuit)
Probable cause
Code Nos.21, 22, 23 and 24 Wheel speed sensor
Code Nos. 11, 12, 13 and 14 are output if the ABS-ECU detects an open circuit
or short-circuit in the (+) wire or (-) wire in any one of the four wheel speed sensors.
D
Malfunction of wheel speed sensor
D
Malfunction of wiring harness or connector
D
Malfunction of hydraulic unit and ABS-ECU
Code Nos. 21, 22, 23 and 24 are output in the following cases.
D
When there is no input from any one of the four wheel speed sensors when travelling
at several km/h or more, even though open circuit can not be verified.
D
When a chipped or blocked-up ABS rotor is detected and if the anti-lock system
operates continuously because a malfunctioning sensor or a warped ABS rotor
is causing sensor output to drop.
D
Malfunction of wheel speed sensor
D
Malfunction of wiring harness or connector
D
Malfunction of ABS rotor
D
Too much gap between the sensor and the ABS rotor
D
Malfunction of hydraulic unit and ABS-ECU
D
Malfunction of wheel bearing
NG
NG
Replace
OK
Check the harness wire, and repair if necessary.
D
Between each wheel speed sensor and ABS-ECU
NG
Repair
OK
Wheel bearing check
(Refer to GROUP 26 and
GROUP 27 - On-vehicle
Service.)
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble
symptom.
Check the following connector: B-123
OK
ABS rotor check
(Refer to P.35B-34.)
NG
Replace
NG
Wheel
speed
sensor
check
(Refer to P.35B-34.)
NG
Replace
OK
Wheel speed sensor output voltage check (Refer to P.35B-26.)
OK
Check the trouble
symptom.
OK
Check the following connectors:
A-03, A-37, A-43 <L.H. drive vehicles>, C-111, C-128, C-136 <R.H.
drive vehicles>, C-146, D-04, D-10, D-30
OK
Measure at the ABS-ECU connector B-123.
D
Disconnect the connector, and measure at the harness side
connector.
D
Resistances between 6 and 7, 8 and 9, 22 and 31, 29 and
30
OK: 1.24 - 1.64 kΩ
NG
Wheel speed sensor check (Refer to P.35B-34.)
Wheel speed sensor installation check
NG
Repair
ABS <4WD> -
Troubleshooting
35B-10
Code No.16 ABS-ECU power supply system (abnormal
voltage drop or rise)
Probable cause
This code is output if the ABS-ECU power supply voltage drops below or rises above
the rated values.
Furthermore, turning the ignition switch to ACC will erase this code.
D
Malfunction of battery
D
Malfunction of wiring harness or connector
D
Malfunction of hydraulic unit and ABS-ECU
Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill it if necessary.
NG
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
NG
Repair
Check the harness wire, and repair if necessary.
D
Between ignition switch (IG2) and ABS-ECU
OK
Check the trouble
symptom.
OK
Check the trouble
symptom.
OK
Check the following connector: B-123
NG
Check the following connectors: B-123, C-128 <R.H. drive
vehicles>, C-130 <L.H. drive vehicles>, C-209, C-210
Measure at the ABS-ECU connector B-123.
D
Disconnect the connector, and measure at the harness side
connector.
D
Start the engine. Voltage between 10 and body earth
OK: System voltage
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