Test N: DTCs C1277 and C1278 - Steering Wheel Angle 1 and 2 Circuit Failure/Faulted

PINPOINT TEST N: DTCs C1277 AND C1278 - STEERING WHEEL ANGLE 1 AND 2 CIRCUIT FAILURE/FAULTED
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
The steering wheel rotation sensor monitors the steering wheel position when the toothed-wheel on the steering shaft passes through the optical field of the sensor.

Steering wheel rotation (in degrees) is sent to the anti-lock brake system (ABS) module through circuit 1572 (DG) and circuit 1573 (YE). Voltage is supplied through circuit 640 (RD/YE). Ground is provided by the ABS module through circuit 1571 (BK).

Possible Causes
^ Circuit open
^ Circuit shorted
^ Steering wheel rotation sensor

N1-N4:

N4-N8:

N8-N10:

N10-N11: