This very simple procedure will Erase the "Adaptive Memory" stored inside the PCM and allow a new "Adaptive Memory" to be developed.
After performing this procedure the PCM will re-learn and store into Adaptive Memory your engines performance characteristics.
Please perform these steps exactly as they are written, in the order they are written. This will cause the adaptive memory in the PCM to be erased and cause the PCM to go into Fast Learn Mode adaptive mode.
Disconnect the POSITIVE battery Terminal and touch it to ground ( not the battery negative terminal ) for 30 seconds. The engine block or the A/C compressor pump will work as a ground. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the "On" position but DO NOT start the engine
Turn Headlight "On"
Turn Headlights "Off"
Turn Ignition Key "Off"
The PCM Adaptive memory has now been flashed, or erased from the PCM.
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.
When you get the engine up to operating temperature the PCM will start to collect data for the "Adaptive Memory".
The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
There are two ways you can reset the ECU. You can disconnect the positive battery cable for a few minutes or you can pull the ECU fuse for a few minutes.
You can reset the ecm with a scan tool or by unhooking the battery.
Just unhook the battery cables for 5 mins, That will reset the ECM
To reset the ECM remove the battery cable (s) for a few minutes. Replace cable. ECM has been reset.
ECM reset for 2002 merc couger
Disconnect the battery for five to 20 minutes. This will reset the ECM.
Unplug you battery for 20 to 25 minutes that should reset you computer.
Resetting the ECM on a 1999 Subaru Forester requires the car to be off. Disconnect the negative battery terminal for t seconds and reconnect it. The computer will now be reset.
Disconnect the battery, keep it disconnected for five to 20 minutes, reconnect the battery.
pull the ECM/PCM fuse for a few seonds then replace it. that should reset it
Unplug battery for 30 minutes then plug back on that will reset the ecm
un hook the batt neg for 30 sec it will reset it up to 95 96 and up you have to have a scan tool to reset the ecm
code 12 means "no mulfunctions are recorded by ECM",no problems founded.You can not reset this code.