C121A

C121A-STEERING ANGLE SENSOR NOT INITIALIZED

For a complete wiring diagram, refer to Diagrams/Electrical. Electrical Diagrams

- 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.





Diagnostic Test

1. CHECK FOR A DTC C121A-STEERING ANGLE SENSOR NOT INITIALIZED

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, read and record DTCs.

With the scan tool, read and record Freeze Frame information.

With the scan tool, erase DTCs.

Test drive the vehicle by turning the vehicle left or right in a curving manner at a velocity between 10 and 25 km/hr (6 and 15 m.p.h.) for 1 minute.

With the scan tool, read and record DTCs.

Does the scan tool display: C121A-STEERING ANGLE SENSOR NOT INITIALIZED?

Yes

- Go To 2

No

- Refer to the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test

2. CHECK THE TERMINALS/CONNECTORS/WIRING HARNESS FOR DAMAGE

Check the Steering Angle Sensor installation.

Check all related wiring for bruised, chafed, pierced, or partially broken wires.

Check all related connectors for broken, bent, pushed out, or corroded terminals.

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 3

3. CHECK THE VOLTAGE ON THE (A108) FUSED B(+) CIRCUIT

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Turn the ignition on.

Measure the voltage of the (A108) Fused B(+) circuit.

Is the voltage above 10 volts?

Yes

- Go To 4

No

- Repair the (A108) Fused B(+) circuit for an open.
- Perform ABS VERIFICATION TEST. ABS Verification Test

4. CHECK THE RESISTANCE OF THE (Z907) GROUND CIRCUIT

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Measure the resistance between the (Z907) Ground circuit and ground.

Is the resistance below 5.0 ohms?

Yes

- Replace the Steering Control Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Repair the (Z907) Ground circuit for an open.
- Perform ABS VERIFICATION TEST. ABS Verification Test