C121A

C121A-09-STEERING ANGLE SENSOR NOT INITIALIZED - COMPONENT FAILURES

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
When the Anti-Lock Brake Module detects a low voltage at the Steering Angle Sensor or Steering Angle Sensor failure.





NOTE: Repair any Steering Control Module (SCM) or Loss of Communications DTCs first before continuing with this with this diagnostic procedure. Testing and Inspection .

1. INITIALIZE ANTI-LOCK BRAKES SYSTEM (ABS) MODULE
1. Turn the ignition on.
2. With the scan tool, read and record the ABS DTCs.

WARNING: To avoid possible serious or fatal injury, check brake capability is available before road testing.

3. Initialize the ABS Module, Perform the ABS VERIFICATION TEST. ABS Verification Test.

NOTE: The ABS Module Initialization process must include driving the vehicle into a 90° turn.

4. Park the vehicle.

Was the ABS Module initialization successful?

Yes

- Go To 2

No

- Perform the ABS Module Initialization routine again, if still unsuccessful.
- Go To 3

2. VERIFY THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, erase the DTCs.

WARNING: To avoid possible serious or fatal injury, check brake capability is available before road testing.

3. Test drive the vehicle by turning the vehicle left and right in a curving manner at a velocity between 15 and 35 km/h (9 and 22 mph).
4. Park the vehicle.
5. With the scan tool, read ABS DTCs.

Is the DTC active at this time?

Yes

- Go To 3

No

- Test complete.

3. STEERING ANGLE SENSOR
1. Turn the ignition off to the lock position.
2. Replace the Steering Angle Sensor. Steering Column - Removal.
3. Perform the ABS VERIFICATION TEST. ABS Verification Test.

WARNING: To avoid possible serious or fatal injury, check brake capability is available before road testing.

4. Test drive the vehicle by turning the vehicle left and right in a curving manner at a velocity between 15 and 35 km/h (9 and 22 mph).
5. With the scan tool, read the DTCs.

Does the DTC remain active?

Yes

- Replace the Anti-Lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test complete.