Visual Inspection Chart
VISUAL INSPECTION CHART
| Mechanical | Electrical |
|---|---|
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- 4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
- 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 , No Power To The Scan Tool, to diagnose no power to the scan tool.
- 7. If the scan tool does not communicate with the vehicle:
- verify the ignition is in RUN (ON).
- The air bag warning indicator prove-out (other indicators may NOT prove the ignition is in RUN) confirms the ignition is in RUN. If the ignition does not transition to RUN, refer to STEERING COLUMN SWITCHES to diagnose no power in RUN.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK to diagnose no response from the PCM.
- verify the ignition is in RUN (ON).
- 8. Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
- If the network test passes, proceed with module self-test diagnostics.
- 9. Carry out the self-test diagnostics for the BCM , RFA , module (if equipped), Tire Pressure Monitor Module (TPM) (if equipped), and the PCM.
- 10. If the DTCs retrieved are related to the concern, go to DTC CHARTS .
- 11. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
NOTE:
5. Make sure to use the latest scan tool software release.
NOTE:
6. The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC
are provided to the VCM
.