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Inspection and Verification: Notes

  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Binding or misaligned steering column
    • Loose steering column shaft bolts
    • Steering column shaft coupling/U-joints
    • Steering gear
    • Suspension components
    • Tie-rod ends
    • Tire pressure
    • Tires
    • Battery Junction Box (BJB) 80A MIDI (WH) fuse
    • PCM
    • Power Steering Control Module (PSCM)
    • Smart Junction Box (SJB) fuse 35 (10A)
    • SJB 
    • Wiring, terminals or connectors
  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.
  4. 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  .
  5. 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 article, No Power To The Scan Tool, to diagnose no power to the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • verify the ignition key is in the ON position.
    • verify the scan tool operation with a known good vehicle.
    • refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the PCM.
  7. Carry out the network test.
    • If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
    • If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the PSCM  .
  9. If the DTCs retrieved are related to the concern, go to the POWER STEERING CONTROL MODULE (PSCM) DTC CHART . For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULE article.
  10. If no DTCs related to the concern are retrieved, Go to SYMPTOM CHART - STEERING SYSTEM  or Go to SYMPTOM CHART - NVH .
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