Inspection and Verification

Note: If the bi-fuel vehicle does not operate correctly in alternative fuel mode, refer to Computers and Control Systems Testing and Inspection

1. Verify the customer concern by operating the system. If the concern is with the fuel gauge, determine if the fuel gauge is operating correctly with the ignition switch.
1. in the RUN position with the engine OFF
2. is the START position before the ignition switch is released.
3. in the RUN position with the engine






2. Visually inspect for obvious signs of mechanical or 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.
4. If the concern is not visually evident, connect the New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS Tester does not communicate with the vehicle:
- check the connections to the vehicle
- check the ignition switch position
5. If the NGS Tester still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
6. Carry out the DATA LINK DIAGNOSTIC TEST. If the NGS Tester responds with:
- NO RESP/NOT EQUIP for alternative fuel control module (AFCM), GO to Pinpoint Test A.
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs). Erase the continuous DTCs and carry out self-test diagnostics for the instrument cluster.
7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.