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Inspection and Verification




Steering Column Switches

Inspection and Verification

NOTE: Make sure the vehicle battery is fully charged and in good condition before diagnosing any ignition switch concerns.

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart





3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

4. NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).

5. NOTE: The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.

If the scan tool does not communicate with the VCM:

- check the VCM connection to the vehicle.

- check the scan tool connection to the VCM.

- Refer to Module Communications Network Testing and Inspection, No Power To The Scan Tool, to diagnose no power to the VCM.

6. If the scan tool does not communicate with the vehicle:
- verify the ignition is ON.
- The air bag warning indicator prove-out confirms ignition ON (other indicators may NOT prove ignition is ON). If ignition does not turn ON, GO to Symptom Chart. Symptom Related Diagnostic Procedures

- refer to Module Communications Network Testing and Inspection Inspection and Verification to establish a scan tool session.

- verify the scan tool operation with a known good vehicle.

7. Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to Module Communications Network Testing and Inspection.

- If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).

8. If equipped with a start/stop switch, carry out the self-test diagnostics for the RFA module.

9. If the DTCs retrieved are related to the concern, refer to the Remote Function Actuator (RFA) Module DTC Chart. If no DTCs related to the concern are retrieved, GO to Symptom Chart. [1][2]Diagnostic Trouble Code Descriptions Symptom Related Diagnostic Procedures

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