I believe I have a CPU issue and would love some opinions and ideas for troubleshooting and where to go from here.
I have an 06 TJ wrangler x with a 4.0 has approx. 86k. Frame was prof sandblasted and painted before I acquired the Jeep. Only mentioning this as perhaps there are some ground concerns. The jeep is a runner and seems to start and run reliably for days and weeks, right up until the moment it seems to die. Then with enough patience and letting it sit in my yard the thing at some point in time will just start running again.
Presently my jeep died and will not restart. All electronics appear to work properly. Radio, Lights etc. With the exception of my battery voltage gauge, and my gas gauge. These 2 gauges seem to be the tell that my jeep is not going to start as they have been tells the last 5 times my jeep has done this. I tried replacing the key actuator, tumbler, switch etc. All new parts and still the same issue. It won’t start. If I jump the control wire to the starter and give it 12V the starter turns over. If I plug in a OBD2 sensor it repeatedly gets to a 96% download and says there is a fault in my jeeps OBD2 system. Which is what made me think perhaps this is a CPU issue. It also looks like the CPU has been replaced at some point.
I’m not sure where to go from here. I assume it could be a bad CPU or perhaps there’s an issue with something that is bringing the CPU down. I just don’t want to spend the $ on the CPU if it’s just a symptom of something else. At first I thought maybe it was a fuel sending unit or something because of the gauge not functioning when the jeep won’t start. But this failure of the CPU to communicated with my OBD2 has me scratching my head.
Any ideas would be greatly appreciated.
I have an 06 TJ wrangler x with a 4.0 has approx. 86k. Frame was prof sandblasted and painted before I acquired the Jeep. Only mentioning this as perhaps there are some ground concerns. The jeep is a runner and seems to start and run reliably for days and weeks, right up until the moment it seems to die. Then with enough patience and letting it sit in my yard the thing at some point in time will just start running again.
Presently my jeep died and will not restart. All electronics appear to work properly. Radio, Lights etc. With the exception of my battery voltage gauge, and my gas gauge. These 2 gauges seem to be the tell that my jeep is not going to start as they have been tells the last 5 times my jeep has done this. I tried replacing the key actuator, tumbler, switch etc. All new parts and still the same issue. It won’t start. If I jump the control wire to the starter and give it 12V the starter turns over. If I plug in a OBD2 sensor it repeatedly gets to a 96% download and says there is a fault in my jeeps OBD2 system. Which is what made me think perhaps this is a CPU issue. It also looks like the CPU has been replaced at some point.
I’m not sure where to go from here. I assume it could be a bad CPU or perhaps there’s an issue with something that is bringing the CPU down. I just don’t want to spend the $ on the CPU if it’s just a symptom of something else. At first I thought maybe it was a fuel sending unit or something because of the gauge not functioning when the jeep won’t start. But this failure of the CPU to communicated with my OBD2 has me scratching my head.
Any ideas would be greatly appreciated.
