F: DTCs C1277, C1278 and C1963 - Steering Wheel Angle 1 and 2 Circuit Failure/Faulted and Stability Control Inhibit Warning

Pinpoint Test F: DTCs C1277, C1278 and C1963 - Steering Wheel Angle 1 and 2 Circuit Failure/Faulted and Stability Control Inhibit Warning
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
The steering wheel rotation (in degrees) is sent to the ABS module along circuits VSC06 (GY/BN) and VSC07 (VT/OG). Voltage is supplied to the steering wheel angle sensor from the ABS module along circuit CCS01 (VT/WH) and ground is provided by the ABS module through circuit RSC02 (BU/WH).

The steering wheel rotation sensor monitors the steering wheel position when the slotted wheel in the clockspring assembly rotates through the infrared light generated by the sensor.
^ DTC C1277 Steering Wheel Angle 1 and 2 Circuit Failure - If during normal operation or the ABS module on-demand self test, the ABS module detects an open circuit, short to voltage or short to ground along circuits VCS06 (GY/BN) or VCS07 (VT/OG), DTC C1277 will be set. An internal failure of the steering wheel rotation sensor may also cause DTC C1277 to set.
^ DTC C1278 Steering Wheel Angle 1 and 2 Signal Faulted - If during normal operation or the ABS module on-demand self test, the ABS module does not receive the steering wheel rotation sensor input or if the input received does not agree with the input from other sensors, DTC C1277 will be set.
^ DTC C1963 Stability Assist Inhibit Warning - If conditions exist during normal operation that prevents the roll stability control system from operating, DTC C1963 will be set. This DTC is usually set due to the steering wheel rotation sensor or the stability control sensor cluster being damaged or installed incorrectly.

This pinpoint test is intended to diagnose the following:
^ Wiring, terminals or connectors
^ Steering wheel rotation sensor

F1-F3:

F4-F6:

F6 (Continued)-F8:

F8 (Continued)-F10: