PCM Reset Procedure

After a PCM reset procedure has been performed, the following conditions will be met:

• All DTCs will be cleared from PCM memory.
• All freeze frame data will be cleared from PCM memory.
• Diagnostic monitoring results will be cleared from PCM memory.
• OBD-II system monitor status will reset.
• DTC P1000 will be set in PCM memory until all OBD-II system monitors or components have been tested to satisfy OBD-II drive cycle without any faults occurring. To clear DTC P1000, perform DRIVE CYCLE PROCEDURES  under ADDITIONAL SYSTEM FUNCTIONS. Ensure OBD-II DRIVE CYCLE PROCEDURES are performed to verify repair.

To perform PCM reset using scan tool, follow scan tool manufacturer's operating instructions. If after clearing DTCs a problem has not been corrected, or a fault is still present, a hard code will immediately be reset in PCM memory.