Mode 1 Procedure

Mode 1:

1. Ensure that there are no vacuum and/or air system intake leaks.
2. Run the engine for 3 minutes or until the engine reaches operating temperature 80°C (176°F).
3. Ensure that all accessories are OFF, including A/C.
4. Ensure that idle speed and ignition timing are properly adjusted.
5. Turn key OFF.
6. Set the parking brake and block the drive wheels.
7. Place the transmission in PARK (A/T) or NEUTRAL (M/T).
8. Restart the engine.
9. Increase the engine speed to 2000 +/- 250 rpm and maintain it for at least 15 seconds.
10. Increase the engine speed to 4000 +/- 250 rpm and maintain it for at least 15 seconds.
11. Bring engine speed back to idle.
12. If the cooling fan is running, wait until the cooling fan stops running before performing this step. Let engine idle for approximately 30 seconds.
13. If an active MODE 1 Parameter Identification (PID) is available, monitor the PID to verify successful Mode 1 completion. If Mode 1 can not be completed despite accurately following the procedure, go to Pinpoint Test QC to diagnose the cause of the Mode 1 failure. QC - OBD II Monitor Testing Not Complete (DTC P1000)
14. Key OFF.