Dustin Gebhardt
Full Access Members
Last weekend the CEL light came on, along with the wrench icon and the traction icon. Limp mode activated. FORScan came up with P1500, U0101, etc, all dealing with a lost TCM connection. I checked fuses 37 and 73 in the engine compartment fuse box by pulling the fuses out and verifying continuity with my Fluke multimeter. Both fuses passed. Car would not start. My battery was old and had a voltage of 11.7, so I had it tested (it failed) and I bought a new battery. It ran okay for a couple of days and then the same codes and lights appeared. New battery is 12.6V with engine off, 13.7V with engine running (when I can get it to run). I recently replaced my AC compressor, TXVs, condenser, and dryer, plus all of the nitrile rings and seals. I believe that I disconnected the transmission main connector that sits on the passenger wheel well (C146) while performing the AC work. I pulled the connector apart and it looks fine. I checked continuity between the F37 and F73 fuses with the pins on the connector (pin 22 and 23, IIRC), and those tested fine, too. Yet the problem keeps coming back. It will start and run sometimes, other times it won't. Last night I was able to get it to go from not starting to starting by (key on, engine off) pressing on the brake pedal, moving from P to R-N-D-3-2-1 and back to P. This morning, it wouldn't start again, so I again rowed the gear lever, but nothing happened when I went back to P. But when I shifted to N, I could get it to start. It ran fine for the 20-mile commute to work.
Several years ago, the wire harness melted where it sat next to the exhaust manifold (actually shorty headers, if that matters). I sealed all of the exposed wires, pasted the whole area with liquid electrical tape, wrapped the harness with wire harness tape, and secured the harness away from the exhaust. That issue caused F37 to blow, but F37 has been fine ever since then, and that's been over 50k miles ago. No other trans issues to speak of between then and now.
Thoughts?
Several years ago, the wire harness melted where it sat next to the exhaust manifold (actually shorty headers, if that matters). I sealed all of the exposed wires, pasted the whole area with liquid electrical tape, wrapped the harness with wire harness tape, and secured the harness away from the exhaust. That issue caused F37 to blow, but F37 has been fine ever since then, and that's been over 50k miles ago. No other trans issues to speak of between then and now.
Thoughts?
