Initial Inspection and Diagnostic Overview

INSPECTION AND VERIFICATION

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage; refer to the 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. If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- SCP+, SCP-, UBP or ISO circuit fault, all electronic control units no response/not equipped, refer to Module Communications Network (Information Bus).
- No response/not equipped for the DDM, DATC, FEM or REM; refer to Module Communications Network (Information Bus).
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the DDM, DATC, FEM or REM.

7. If the DTCs retrieved are related to the concern, go to the DDM, FEM or REM Diagnostic Trouble Code (DTC) Index(es) to continue diagnostics. DDM Diagnostic Trouble Code (DTC) Index FEM Diagnostic Trouble Code (DTC) Index REM Diagnostic Trouble Code (DTC) Index
8. If DTCs are retrieved that are not found in the following DDM, FEM or REM Diagnostic Trouble Code (DTC) Indexes, refer to the master DDM, FEM or REM Diagnostic Trouble Code (DTC) Indexes in Module Communications Network (Information Bus).
9. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures