Pinpoint Test L: DTCs C0051:16 and 17
Steering Column Switches
Pinpoint Test L: DTCs C0051:16 and 17
Normal Operation
The steering wheel position sensor (also known as the steering wheel rotation sensor) uses 2 optical sensors to monitor the steering wheel position relative to the center position when the ignition is in RUN. The steering wheel position sensor transmits this data to the Steering Column Control Module (SCCM) which processes the data and transmits it on the High Speed Controller Area Network (HS-CAN).
- DTC C0051:16 (Steering Wheel Position Sensor: Circuit Voltage Below Threshold)- This DTC sets if the data received by the SCCM (Steering Column Control Module) from either of the 2 optical sensors is below a predetermined threshold.
- DTC C0051:17 (Steering Wheel Position Sensor: Circuit Voltage Above Threshold)- If the data received by the SCCM (Steering Column Control Module) from either of the 2 optical sensors is above a predetermined threshold.
When either DTC C0051:16 or C0051:17 is set, the SCCM (Steering Column Control Module) ignores the input from the steering wheel position sensor and transmits a fault message on the HS-CAN (High Speed Controller Area Network).
This pinpoint test is intended to diagnose the following:
- Steering wheel rotation sensor
PINPOINT TEST L : DTCs C0051:16 AND 17
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
L1 CHECK THE SCCM (Steering Column Control Module) DTCs
- Review the SCCM (Steering Column Control Module) DTCs retrieved and recorded during Inspection and Verification.
Is DTC B119D:16 and/or B119:17 present?
Yes
DIAGNOSE DTCs B119D:16 and 17 before diagnosing DTCs C0051:16 or C0051:17.
For DTC B119D:16, GO to Pinpoint Test M Pinpoint Test M: DTC B119D:16.
For DTC B119D:17, GO to Pinpoint Test N Pinpoint Test N: DTC B119D:17.
No
GO to L2.
L2 CHECK THE STEERING WHEEL ANGLE SENSOR STATUS (SW_ANG_SENS) PID
- Enter the following diagnostic mode on the scan tool: DataLogger- SCCM (Steering Column Control Module).
- Monitor the SW_ANG_SENS PID.
Does the PID display CORRECT?
Yes
The condition that caused the DTC to set is not present at this time. CLEAR the DTCs. DRIVE the vehicle for more than 1 minute at a speed greater than 32 km/h (20 mph) and make at least 1 left turn and 1 right turn. REPEAT the self-test. If the DTC(s) does not return, RETURN the vehicle to the customer. If the DTC(s) return, GO to L3.
No
If the PID displays FAULT, INSTALL a new steering wheel rotation sensor. REPEAT the self-test. TEST the system for normal operation.
If the PID displays PSCM (Power Steering Control Module) NOT INITIALIZED, GO to L3.
L3 CHECK FOR CORRECT SCCM (Steering Column Control Module) OPERATION
- Ignition OFF.
- Disconnect: All SCCM (Steering Column Control Module) Connectors.
- Check the SCCM (Steering Column Control Module) connectors for:
- corrosion
- damaged pins
- pushed-out pins
- Connect: All SCCM (Steering Column Control Module) Connectors.
- Make sure the SCCM (Steering Column Control Module) connectors are seated correctly, then operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SCCM (Steering Column Control Module). REFER to Steering Column Control Module (SCCM) Service and Repair. CLEAR the DTCs. TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.