Inspection and Verification
WARNING:
Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING:
Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING:
When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.
WARNING:
Always disconnect the battery ground cable at the battery when working on an evaporative emission (EVAP) system or fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
NOTE:
Do not use incandescent lights when inspecting the fuel system. Use only fluorescent or LED lighting.
Visual Inspection Chart
| Mechanical |
|---|
| Bent, kinked or damaged fuel tank filler pipe Bent, kinked or damaged fuel tank filler pipe vent tube (if equipped) Incorrect routing of the fuel tank filler pipe Incorrect routing of the fuel tank filler pipe vent tube (if equipped) Incorrect position of fuel tank filler pipe clamps Incorrect position of fuel tank filler pipe vent tube clamps (if equipped) Fuel tank mounted vapor tubes bent or damaged Evaporative Emission (EVAP) system tubes or hoses bent or damaged Accident damage to the fuel tank Accident damage to the vehicle affecting the fuel tank filler pipe-to-body connection Unauthorized modifications and/or alterations to the vehicle EVAP system fresh air hose plugged (dirt, spider webbing) |
- 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 scan tool to the Data Link Connector (DLC).
NOTE:
Make sure to use the latest scan tool software release.
- 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 , No Power To The Scan Tool, to diagnose no power to the scan tool.
NOTE:
The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.
- 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 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 .
- 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 EVAP system using the scan tool.
- 9.
If the DTCs retrieved are related to the concern, go to Evaporative Emission (EVAP) System DTC Chart in DTC Chart . For PCM-related DTCs, refer to the Engine Controls - Introduction (Except Diesel & Hybrid) . For all other DTCs, refer to Multifunction Electronic Modules .
- 10.
If no DTCs related to the concern are retrieved, GO to Symptom Chart .