What is PCM reprogramming?
Powertrain Control Module reflashing is essentially a software upgrade. PCMs are built with microchips that can be reprogrammed electronically without being removed from the vehicle. Dealers or car repair shops might call it a PCM or ECM reprogramming service. They all refer to an upgrade of your PCM’s microchip.
How to fix a jeep computer control unit?
Be careful not to damage any of the components on the board or the copper traces that connect them. When you have resoldered every pad, let the board cool, and treat the connector socket with the Deoxit… make sure yiu get it into the holes in the connector, and carefully treat the pins in the other half of the PCM where this connecter plugs into.
Where to test the PCM on a Jeep Wrangler?
3-Test for reference voltage (5v) coming out of the PCM at pin 17 ( orange wire) at the black connector and pin 31 (violet/orange wire) at the white connector. If the power input leads and grounds are good, but nothing is coming out of the two reference leads, then the PCM is smoked. Period.
Why are my Jeep PCM screws too long?
Some units have come frome the factory with screws that were too long, and eventually due to vibration shorted the unit out. I replace them with shorter sheet metal screws as standard operating procedure to avoid this issue, since I never ran into this personally.
Is there a cure for a jeep PCM?
I have personally used this cure myself on several Jeeps having been a longtime Jeeper with myfirst being a 76 Cherokee S. I currently have a 95 GC Limited, a 98 GC Laredo, and an 06 Wangler. You cant have just one! As a side note on the deoxit…and this repair, my 98 GC was throwing O2 sensor errors with new sensors and irratic charging issues.
What’s the difference between ECM and PCU in a jeep?
The Jeep Engine Control Module, known as the PCM ( Powertrain Control Module) ECU ( Electrical Control Unit ) or to simply it put the Automotive Engine Computer . Confusing right? If you would like to know more about their differences you can read up on our previous post ” Difference between ECM, ECU & PCM ” which we covered it in details.
Where is the engine control module on a jeep?
The Jeep Engine Control Module, known as the PCM (Powertrain Control Module) ECU (Electrical Control Unit) or to simply it put the Automotive Engine Computer.
Why does my Jeep Cherokee keep stalling?
While certainly frustrating, these stalls can also have serious consequences. Here is why your Jeep Cherokee keeps stalling: Many stalling problems can be attributed to the PCM or crankshaft sensor and there are steps you can take to fix these issues yourself or at the very least point your mechanic in the right direction
Why is my PCM not working on my Jeep Wrangler?
You also lose communication with the OBDII data port & a scanner will not “communicate” & not read. The cause may be a failed PCM but also possible that one of the sensors or its wiring is shorted to ground.