Drive Cycle Mode 1
- 1) Ensure no vacuum leaks exist. Ensure idle speed and ignition timing are within specification. Turn off all accessories.
- 2) Set parking brake and block drive wheels. With transmission in Neutral or Park, start engine and bring to normal operating temperature.
- 3) Let engine idle for 2 minutes with engine temperature above 178°F (81°C). Monitor ECT PID if necessary.
- 4) If an active MODE 1 PID is available, monitor PID to verify successful Mode 1 completion. If Mode 1 cannot be completed by following procedure, go to CIRCUIT TEST QC to diagnose cause of Mode 1 failure.