Jeep Tj Pcm Problems - Asd relay gives all the injectors power, the pcm supplies the ground pulse to fire the injector. May want to check the pin on the pcm for corrosion or a bad connection to the. There are many things that could be causing this issue but the first checks are battery; Condition, age, connections, clean and tight, cables, and ground wires and. The symptoms you have are absolutely a faulty pcm. I have traced it to my pcm. If i press on the. Buying a pcm from fs1 was your first mistake. And yes the pcm controls the a/c compressor. Hopefully they'll send you a replacement that actually works correctly which i can. Virtually impossible to find out specifically how many 05/06 jeep owners have had a pcm issue and replaced it with a good known pcm and it fix the issue. Itโs a known common. Quickly diagnosing and resolving pcm power issues in your jeep tj can help you avoid major problems. Learn how to perform quick checks and get back on the road. I'd start by pulling the connectors to your pcm. it's on the firewall behind the battery. and checking the pins for damage or corrosion. You can send your pcm to. I was able to find a pcm from a 4. 0 grand cherokee. It chrystler p/n 56041 w/the suffix 423ad. My tj is 46041 312ac. On my jeeps pcm it'll crank but the fuel pump won't.
Asd relay gives all the injectors power, the pcm supplies the ground pulse to fire the injector. May want to check the pin on the pcm for corrosion or a bad connection to the. There are many things that could be causing this issue but the first checks are battery; Condition, age, connections, clean and tight, cables, and ground wires and. The symptoms you have are absolutely a faulty pcm.