A couple weeks ago a no bus should up on my tj. I looked online and found out that the connectors behind the instrument panel get corroded so i clean it up and it fired right away no problems and drove it for a week.
While i was at a stop light a week later it idled super low almost like it was about to stop. So i took off the instrument panel, cleaned it more, put it on and it will only crank over but won’t start.
It now says no bus, check engine light, air bag light (it eventually goes off), and sentry key lights are on. The gas gauge and amp doesn’t move even though i have a quarter tank of gas and we tested the battery and fully charged it all night (12 volts). The oil pressure is the only one that moves and it only moves less than an inch.
We hook an obd2 code sensor to it but it couldn’t connect to the computer. So we tested the computer and no luck. We did a manual test also where we turned they key to the on position and held the trip button. It didn’t give us a code but the gauges worked while it was running and then they died again. Next we cleaned all the connections we could find leading from the dash to the computer. We had cleaned all the grounds and the connections put electro cleaner on everything and cleaned the corrosion off the grounds. No change. Next we took each sensor off one at a time with no change. Also the asd relay is clicking constantly when the key is in the on position.
We tested all the fuses, cleaned the battery terminals, and cleaned the crank sensor, have 12 volts to pcm when I pull pcm fuse relay shuts off. Help this jeep is making me go mad crazy trying to figure this out.