PCM Reset

WARNING: This page is about a different car, the 1995 Ford Windstar and 1995 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

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

All DTCs cleared from PCM memory.
All freeze frame data cleared from PCM memory.
All oxygen sensor test data cleared from PCM memory.
OBD-II system monitor status is reset.
DTC P1000 set in PCM memory.

To perform PCM reset using NGS scan tester, ensure connectors are properly connected. Program scan tester using the following steps:

Select vehicle and engine selection menu (optional). See Figure .
Select year, engine, model and any additional information requested by scan tester (optional).
Follow operating instructions from scan tester menu.
Select GENERIC OBD-II FUNCTIONS. Press CONT button if monitors are not complete.
Turn ignition on.
Select CLEAR DIAGNOSTIC CODES.

All codes should now be cleared from PCM memory. If problem has not been corrected or fault is still present, hard code will immediately be reset in PCM memory.

CAUTION: DO NOT disconnect vehicle battery to clear codes. This will erase operating information from Keep-Alive Memory (KAM). To clear KAM, disconnect negative battery terminal for at least 5 minutes.

CAUTION: When battery is disconnected, vehicle computer may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See the COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section before disconnecting battery.