0
the ecm is the cars electronic control module and the pcm is the cars powertrain control module. the ecm controls the ignition and fuel injection system so that when you get close to the speed your cars original tires are safety rated for, your ecm will shut down fuel injection and ignition prcessses until you return to the safe speed. the pcm is a cars powertrain control module. it stops your engine rpms from reaching critical levels. both are computers in your car that enable you to drive safely, and just like any other computer they can be modified, most service to your car now requires the mechanic to diagnose your car like a doctor by plugging into these computers to see whats wrong.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What does the diagnostic code P1694 mean for the 2002 dodge ram 3500 diesel with automatic transmission?
P1694 - No CCD message received from ECM. This is a bus communication failure between the PCM and ECMP1694 - No CCD message received from ECM. This is a bus communication failure between the PCM and ECM
What is the difference between EBM and ECM?
there is many difference
What does companion dtc mean on a pcm or ecm?
If the Pcm sets a code saying that it's companion has dtc, you need to check the Ecm because it will have a code in it.If the Pcm sets a code saying that it's companion has dtc, you need to check the Ecm because it will have a code in it.
How do you fix a dct companion code that was set in both the ecm and pcm?
Either the PCM, or ECM will have another code in it. Diagnose and repair that code and the companion dtc set code will go away.Either the PCM, or ECM will have another code in it. Diagnose and repair that code and the companion dtc set code will go away.
Where is the pcm located in 94 buick lesabre?
The PCM (or ECM) is located on the interior of the car on the passenger side. To access the PCM/ECM remove the kick panel just beneath the glove box and it is right there. Disconnect the three electrical harnesses and and sucuritity clip and it's out.
What is the pcm on a Pontiac vibe?
PCM = Power Control Module. It is the car's main computer/brain. Also can be referred to as the ECU or ECM.
What is OBD2 code P0688?
ECM/PCM Power Relay Sense Circuit /Open
Does a 1992 camaro z28 with an LT1 have an ecm and pcm?
Is this a Factory LT1? In your 1992 Z28?
Which fuse works the cooling fans?
The fuse that works the cooling fan(s) depend on the make/model/year of the car. In general cooling fans are controlled by a fan relay & fuse or by the ecm, bcm,pcm (ecm/bcm/pcm are computers)
1997 jeep Cherokee error code 66 and 11 and 12?
11: No crank signal to computer. Fault in wiring between crankshaft position sensor (CPS) and ECM ( PCM or computer ) or faulty CPS.12: Battery disconnected. Battery or power to the ECM disconnected in the last 50 key cycles.66: TCM to PCM failure. No message from the Transmission Control Module (TCM) to the Powertrain Control Module (PCM)
What is P1693?
Trouble code P1693 means: A companion DTC was set in both the ECM and PCM
Where is the computer in a 95 Buick roadmaster?
PCM Location where is the ecm or brain in a 95 buick roadmaster
