Metafield Product & Technical
What’s the difference between an ECM and a PCM?
“ECM” stands for Electronic Control Module. “PCM” stands for Powertrain Control Module. Both the ECM and PCM control the engine; however, the PCM also has control over the transmission.
Do I have to transfer anything from my original ECM/PCM?
Some GM applications have a knock module that must be transferred to the replacement module. Some older Ford applications have a calibration module that must be transferred to the replacement module.
Do all Ford vehicles require a Passive Anti-Theft System (P.A.T.S) reset?
No, not all Ford vehicles require PATS reset. Check the PATS chart found on the O.E. Manufacturer’s Service site for your application.
The replacement PCM for a Ford vehicle won’t start the vehicle. Why?
Ensure that the PCM was properly flash programmed for the vehicle. Also note whether the vehicle is equipped with the Ford "passive anti-theft system", which requires an on-car relearn.
Do GM vehicles have a passive anti-theft system?
Yes, most GM vehicles have a VATS, Pass Key or Pass Lock anti-theft system.
What steps should I take to ensure the original PCM is causing the issue?
Prior to replacing the original ECM/PCM, the installer should determine what caused the original to fail. Common causes of failures are: poor grounds and power, a bad wiring harness and short-circuited solenoids/relays.
Do all Chrysler Power Train Control Modules (PCM) need VIN programming?
Chrysler models 1996 and newer will need to be VIN programmed.
What are the most common symptoms of a bad PCM?
Check Engine Light staying on after resetting, engine turning off for no reason, loss of spark, loss of fuel injection, loss of pulse on fuel pump, intermittent starting problems.
Do I need a scanner to reset the anti-theft system
Not necessarily. There is a 30-minute manual procedure that can be done without a scanner. Refer to your O.E. manufacturer’s approved service manual for details.