Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read the Steering Column Control Module (SCCM) DTCs and record on the repair order.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension. If no problems are found, test complete.
CHECK THE RIGHT STEERING WHEEL SWITCH
1. Turn the ignition off.
2. Disconnect the Right Steering Wheel Switch (Speed Control) harness connector.
3. Turn the ignition on.
4. With the scan tool, read the DTCs
  Is this DTC active?
  
  Yes
  - Go To 3
  No
  - Replace the Right Steering Wheel Switch (Speed Control Switch) in accordance to the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (D592) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Measure the voltage between ground and the (D592) LIN Bus circuit at the Right Steering Wheel Switch harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (D592) LIN Bus circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (D592) LIN BUS CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Steering Column Control Module (SCCM) C3 harness connector.
3. Check for continuity between ground and the (D592) LIN Bus circuit at the SCCM C3 harness connector.
  Is there continuity between ground and the (D592) LIN Bus circuit?
  
  Yes
  - Repair the (D592) LIN Bus circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Steering Column Control Module (SCCM) in accordance to the Service Information. Refer to MODULE, STEERING COLUMN CONTROL, REMOVAL .