Reset Procedure

Description
The powertrain control module (PCM) Reset allows a scan tool to command the PCM to clear all emission-related diagnostic information.

The following events occur when a PCM reset is performed:

- Clears the number of DTCs.
- Clears the DTCs.
- Clears the freeze frame data.
- Clears oxygen sensor test data.
- Resets status of the OBD II system monitors.

PCM Reset
New Generation STAR (NGS) Tester

1. Key OFF.
2. Perform the necessary vehicle preparation and visual inspection.
3. Select VEHICLE & ENGINE SELECTION menu (OPTIONAL).
4. Select NEW VEHICLE YEAR & MODEL.
5. Select year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 state, California) (OPTIONAL).
6. Follow operating instructions from the menu.
7. Select GENERIC OBD II FUNCTIONS.
- Press CONT button if all OBD II monitors are not complete.
8. Turn key ON.
9. Select CLEAR DIAGNOSTIC CODES.
10. Press START Key.

Resetting Keep Alive Memory (KAM)
Disconnect the negative (-) lead from the battery for a minimum of 5 minutes (this will also result in the PCM reset described above). Resetting KAM will also clear learned values the PCM has stored for adaptive systems such as Idle and Fuel. Once the vehicle is driven, the PCM will relearn new adaptive values. It will take a few miles and the vehicle may run rough until the values are relearned.