Mitsubishi LANCER EVOLUTION-IV 1998 Workshop Manual page 378

27-12
Code No. 33: Steer sensor (ST-N) system
This code is output when the steering wheel is turned 400_ or more in the same
direction with ST-N OFF (HIGH voltage).
Measure at B-95 AYC-ECU connector.
D Connector connected.
D Ignition switch: ON
D Turn steering wheel about 90_ in
either direction from the straight-
ahead position.
D Voltage across 17 and body
ground.
OK: The voltage increases from
about 0.5 V or less to about
3.5 V.
OK
Replace AYC-ECU.
Code No. 34: Steer sensor (ST-1, ST-2) system
This code is output if a turning condition is detected for a cumulative period of time
of 15 min. or more, during which there is no change in the steer sensor (ST-1, ST-2)
signals with the wheel speed 15 km/h or more.
Measure at B-95 AYC-ECU connector.
D Connector connected.
D Ignition switch: ON
D Voltage across 4/5 and body
ground
OK: The voltage alternates
between about 0.5 V and
about 3 V as the steering
wheel is turned.
OK
Replace AYC-ECU.
REAR AXLE –
Troubleshooting <AYC>
NG
Check the following connectors:
B-95, B-65, B-98
Check the trouble symptom.
Check the harness between steer sen-
sor and AYC-ECU.
Replace the steer sensor.
Check the trouble symptom.
Replace AYC-ECU.
NG
Check the following connectors:
B-95, B-65, B-98
Check the trouble symptom.
Check the harness between steer sen-
sor and AYC-ECU.
Replace the steer sensor.
Check the trouble symptom.
Replace AYC-ECU.
Probable cause
D Defective steer sensor
D Defective harness or connector
D Defective AYC-ECU
NG
OK
NG
NG
OK
NG
Probable cause
D Defective steer sensor
D Defective harness or connector
D Defective AYC-ECU
NG
OK
NG
NG
OK
NG
Repair
Repair
Repair
Repair