
REAR AXLE –
Troubleshooting <AYC>
27-11
Code No. 33: Steer sensor (ST-N) system
Probable cause
This code is output when the steering wheel is turned 400
_
or more in the same
direction with ST-N OFF (HIGH voltage).
D
Defective steer sensor
D
Defective harness or connector
D
Defective AYC-ECU
NG
Replace AYC-ECU.
Check the trouble symptom.
OK
Replace the steer sensor.
NG
Check the harness between steer sen-
sor and AYC-ECU.
NG
Repair
OK
Replace AYC-ECU.
OK
Check the trouble symptom.
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 V.
NG
Check the following connectors:
B-95, B-65, B-98
NG
Repair
Code No. 34: Steer sensor (ST-1, ST-2) system
Probable cause
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.
D
Defective steer sensor
D
Defective harness or connector
D
Defective AYC-ECU
NG
Replace AYC-ECU.
Check the trouble symptom.
OK
Replace the steer sensor.
NG
Check the harness between steer sen-
sor and AYC-ECU.
NG
Repair
OK
Replace AYC-ECU.
OK
Check the trouble symptom.
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.
NG
Check the following connectors:
B-95, B-65, B-98
NG
Repair