Inspection and Verification

Steering Column Switches

Inspection and Verification

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 Information Bus, 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 (other indicators may NOT prove ignition is ON) confirms ignition ON. If ignition does not turn ON, GO to Symptom Chart. Steering Column Switches

- refer to Information Bus Inspection and Verification to establish a scan tool session (without the ignition ON).

- 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 Information Bus.

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

8. Carry out the self-test diagnostics for the Smart Junction Box (SJB).

9. If equipped with a Start/Stop switch, turn ignition OFF. The ignition must be OFF to carry out a Remote Function Actuator (RFA) module self-test.

10. If equipped with a Start/Stop switch, carry out the self-test diagnostics for the RFA module. Disregard RFA DTC B10D7:31 if 2 Intelligent Access (IA) keys are not in the vehicle during the on-demand self test.

11. If the DTCs retrieved are related to the concern, refer to the Smart Junction Box (SJB) Module DTC Chart and/or the Remote Function Actuator (RFA) Module DTC Chart. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Steering Column Switches Steering Column Switches