Qt4 Perform Diagnostic Test Mode
WARNING: This page is about a different car, the 2004 Ford Pickup Heritage. However, it is still accessible from the selected car via links, so may be relevant.
- Start the engine and warm it up to normal engine operating condition (drive vehicle for about 10 minutes in gas mode and 10 minutes in ALT fuel mode.)NOTE: Refer to DIAGNOSTIC METHODS - BI-FUEL CNG for details of diagnostic trouble code (DTC) retrieval.NOTE: Always retrieve PCM DTCs before AFCM DTCs.
- Using the scan tool:
Are any DTCs present?
| Yes | No |
|---|---|
| GO to Quick Test QT5 ERASE AND RETEST . | IF no codes displayed and engine does not start in ALT fuel mode, GO to NO DTCS PRESENT SYMPTOM CHART 3 . IF no codes are displayed and engine does not start in gasoline mode, GO to NO DTCS PRESENT SYMPTOM CHART 4 . |