Initial Inspection and Diagnostic Overview

Inspection and Verification
1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect the following for obvious signs of electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

NOTE: Make sure to use the latest IDS or equivalent tester software release.

4. If the cause is not visually evident, connect the IDS or equivalent tester software release to the data link connector (DLC).

NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.

5. If the IDS or equivalent tester software release does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the IDS or equivalent tester software release connection to the VCM.
- See PINPOINT TEST 8: NO MODULE/NETWORK COMMUNICATION - NO POWER TO THE DIAGNOSTIC TOOL Pinpoint Test 8: No Module/Network Communication - No Power to the Diagnostic Tool, to diagnose no communication with the scan tool.

6. If the IDS or equivalent tester software release 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.
- See COMMUNICATIONS NETWORK. No response from the powertrain control module (PCM).

7. Carry out the net-work test
- If the IDS or equivalent tester software release responds with no communication for one or more modules, see COMMUNICATIONS NETWORK.
- If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).

8. Clear the continuous DTCs and carry out the self-test diagnostics for the anti-theft - PATS.
9. If the DTCs retrieved are related to the concern, see DIAGNOSTIC TROUBLE CODE (DTC) INDEX - ANTI THEFT - PATS. Diagnostic Trouble Code Descriptions For all other DTCs See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - B, C AND U CODES, or DIAGNOSTIC TROUBLE CODE (DTC) INDEX- POWERTRAIN CONTROL MODULE (PCM).
10. If no DTCs related to the concern are retrieved, see SYMPTOM TROUBLESHOOTING CHART - SMART JUNCTION BOX (SJB) - ANTI THEFT - PATS. Symptom Related Diagnostic Procedures