C1297

UF1AE TRANSFER: FOUR WHEEL DRIVE CONTROL SYSTEM: C1297/97: Steering Angle Sensor
C1297/97 - Steering Angle Sensor

DESCRIPTION

- The 4WD control ECU determines that the vehicle is turning based on the signals sent from the steering angle sensor.

- The steering angle sensor signal is sent to the 4WD control ECU via CAN communication system.

- The 4WD control ECU detects the amount of steering wheel movement and performs "slip control at vehicle start up", according to the amount of movement, and "slip control" to secure high turning performance.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK DTC

(a) Clear the DTC .

(b) Turn the engine switch off.

(c) Turn the engine switch on (IG) and check that no CAN communication system DTC is output.

(d) Start the engine.

(e) Drive the vehicle and turn the steering wheel to the right and left at a speed of 24 mph (35 km/h) and check that no brake control system DTC (C1231/31) is output Vehicle Stability Control System.

Result:





HINT
When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

C -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.

2. INSPECT STEERING ANGLE SENSOR (STEERING ANGLE SENSOR POWER SOURCE CIRCUIT)

(a) Disconnect the steering angle sensor connector.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)
OK -- Continue to next step.

3. INSPECT STEERING ANGLE SENSOR (ESS CIRCUIT)

(a) Turn the engine switch off.





(b) Measure the resistance according to the value(s) in the table below.

Resistance:





Result:





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A -- REPLACE STEERING ANGLE SENSOR