Inspection and Verification

Inspection And Verification

1. Verify the customer concern.
^ Note that there are a number of systems on the vehicle which will communicate with the message center, giving the driver information useful in diagnosing the fault
2. Visually inspect for obvious signs of mechanical or electrical damage.

Mechanical
^ Fuel filler cap and seal
^ Fuel filler neck
^ DMTL fresh air filter (restriction, etc)
^ Fuel tank (leaks, damage, etc)
^ Fuel lines and joints, etc
^ Carbon canister
^ Purge valve
^ DMTL pump module

Electrical
^ Fuses
^ Connectors
^ Harness(es)
^ Purge valve
^ DMTL pump

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. Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom chart or DTC index.
^ Make sure that all DTCs are cleared the rectification.