What happens when the PCM on a jeep fails?
The PCM is what is often referred to as your Jeep’s “computer.”. It controls a variety of functions, including how your engine runs and the individual sensors that provide it with information. If your Jeep’s PCM fails, you can expect your vehicle to exhibit a variety of symptoms, including the Jeep running badly,…
What causes a jeep powertrain control module failure?
What Causes a Jeep PCM Failure? The Powertrain Control Module (PCM) in your Jeep is designed to serve as the brain of your vehicle’s engine. The PCM is what is often referred to as your Jeep’s “computer.” It controls a variety of functions, including how your engine runs and the individual sensors that provide it with information.
Which is the fuse on a Jeep Wrangler?
As to which fuse, I don’t know but if there is no power from that wire I would check the fuses. I think in the earlier XJs that was fuse 11 in the junction block & in the ’04 TJs it is fuse 12 in the fuse block. If the fuse is good see if you are getting 12v power to the fuse which comes from the ignition switch.
Can a bad ignition switch be a bad PCM?
If the fuses are not getting power the ignition switch may be bad. That happens some on the TJs. The gauges not responding can be an indication of a bad PCM too but without key on/start power to the PCM I would guess the problem is elsewhere.
As to which fuse, I don’t know but if there is no power from that wire I would check the fuses. I think in the earlier XJs that was fuse 11 in the junction block & in the ’04 TJs it is fuse 12 in the fuse block. If the fuse is good see if you are getting 12v power to the fuse which comes from the ignition switch.
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.
If the fuses are not getting power the ignition switch may be bad. That happens some on the TJs. The gauges not responding can be an indication of a bad PCM too but without key on/start power to the PCM I would guess the problem is elsewhere.
What is the ignition switch on a Jeep Cherokee?
Ignition Switch – Back-up Lamps, A/C Relay Coil, Shift Selector, Speed Control, Aux. Cooling Fan Relay Coil WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.