Mitsubishi Lancer Evolution VI. Manual - part 64

ABS  – 

Troubleshooting

35B-6

<EVOLUTION-V, VI>

Diagnosis
code No.

Diagnosis items

Reference Page

11

Wheel speed sensor (FR) system (open- or short-circuit)

35B-8

12

Wheel speed sensor (FL) system (open- or short-circuit)

35B-8

13

Wheel speed sensor (RR) system (open- or short-circuit)

35B-8

14

Wheel speed sensor (RL) system (open- or short-circuit)

35B-8

15

Wheel speed sensor system (abnormal output signal)

35B-9

16

ABS-ECU power supply system (abnormal voltage drop or rise)

35B-11

21

Wheel speed sensor (FR) system

35B-8

22

Wheel speed sensor (FL) system

35B-8

23

Wheel speed sensor (RR) system

35B-8

24

Wheel speed sensor (RL) system

35B-8

32

Acceleration sensor  (longitual acceleration) circuit system

35B-13

33

Stop lamp switch system (open circuit or stop lamp stays ON)

35B-15

41

Solenoid valve (FR) system

35B-15

42

Solenoid valve (FL) system

35B-15

43

Solenoid valve (RR) system

35B-15

44

Solenoid valve (RL) system

35B-15

51

Valve relay system

35B-17

53

Motor relay system

35B-19

63

ABS-ECU failure

Replace ABS-ECU.

71

Acceleration sensor (lateral acceleration) system

35B-20

ABS  – 

Troubleshooting

35B-7

INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES

<EVOLUTION-IV>

Code Nos.11, 12, 13 and 14 Wheel speed sensor system
(open- or short-circuit)

Probable cause

Code Nos.21, 22, 23 and 24 Wheel speed sensor system

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 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 8 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 ABS-ECU

D

Malfunction of wheel bearing

NG

Check the harness wire, and repair
if necessary.

D

Between each wheel speed sensor
and ABS-ECU

NG

Replace the ABS-ECU.

OK

Check the trouble symptom.

OK

Check the following connector:
B-24

NG

Repair

NG

Repair

OK

Wheel bearing check

OK

ABS rotor check 
(Refer to P.35B-45.)

OK

Wheel speed sensor output voltage
check (Refer to P.35B-35.)

NG

Wheel speed sensor check 
(Refer to P.35B-45.)

NG

Replace

OK

Check the following connectors:
A-26, A-50, B-17, B-24, B-52, D-09,
D-14, D-19

OK

Check the trouble symptom.

OK

Measure at the ABS-ECU connector
B-24.

D

Disconnect the connector, and
measure at the harness side
connector.

D

Resistances between 8 and 21,
6 and 19, 7 and 20, 9 and 22
OK: 1.4  – 1.8 k

Ω

NG

Wheel speed sensor check 
(Refer to P.35B-45)

NG

Replace

Wheel speed sensor installation check

NG

Repair

NG

Replace

ABS  – 

Troubleshooting

35B-8

<EVOLUTION-V, VI>

Code Nos.11, 12, 13 and 14 Wheel speed sensor system
(open- or short-circuit)

Probable cause

Code Nos.21, 22, 23 and 24 Wheel speed sensor system

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 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 8 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 sensor output
is lowered due to faulty wheel speed sensor.

D

Malfunction of wheel speed sensor

D

Malfunction of wiring harness or connector

D

Too much gap between the sensor and the ABS rotor

D

Malfunction of ABS-ECU

D

Malfunction of wheel bearing

NG

Check the harness wire, and repair
if necessary.

D

Between each wheel speed sensor
and ABS-ECU

NG

Replace the ABS-ECU.

OK

Check the trouble symptom.

OK

Check the following connector:
B-24

NG

Repair

NG

Repair

OK

Wheel bearing check

OK

ABS rotor check 
(Refer to P.35B-45.)

OK

Wheel speed sensor output voltage
check (Refer to P.35B-35.)

NG

Wheel speed sensor check 
(Refer to P.35B-45.)

NG

Replace

OK

Check the following connectors:
B-24, B-52, B-17, A-26, A-50, D-04,
D-14, D-19

OK

Check the trouble symptom.

OK

Measure at the ABS-ECU connector
B-24.

D

Disconnect the connector, and
measure at the harness side
connector.

D

Resistances between 8 and 21,
10 and 19, 7 and 20, 9 and 22
OK: 1.4  – 1.8 k

Ω

NG

Wheel speed sensor check 
(Refer to P.35B-45.)

NG

Replace

Wheel speed sensor installation check

NG

Repair

NG

Replace

ABS  – 

Troubleshooting

35B-9

Code No.15 Wheel speed sensor system (abnormal output
signal)

Probable cause

This code is output when there is an abnormality in the output signal from any one
of the four wheel speed sensors while driving (except for an open circuit or short
circuit).

D

The four vehicle tires are of different sizes

D

Improperly installed wheel speed sensor

D

Malfunction of wheel speed sensor

D

Malfunction of wiring harness or connector

D

Malfunction of ABS rotor

D

Malfunction of wheel bearing

D

Malfunction of ABS-ECU

OK

Check the harness wire, and repair
if necessary.

D

Between each wheel speed sensor
and ABS-ECU

OK

Wheel bearing check

NG

Replace the ABS-ECU.

OK

ABS rotor check (Refer to P.35B-45.)

NG

Replace

OK

Check the trouble symptom.

OK

Check the following connector:
B-24

NG

Repair

Check the trouble symptom.

OK

Wheel speed sensor output voltage
check (Refer to P.35B-35.)

NG

Wheel speed sensor check 
(Refer to P.35B-45.)

NG

Replace

YES

Wheel speed sensor installation check

NG

Repair

Are the sizes of all four tires identical?

NO

Equip the vehicle with tires of identical
sizes.

NG