Hi guys, first post here.
I've had my 2012 Cruze for almost three years and driven it to 58K miles with absolutely no issues. It's been about as problem-free as I could ask for.
I recently started working from home, and I haven't driven my car in over a month. I decided to sell it, but yesterday when I went to start it, it wouldn't crank.
When I try to start it, there is no activity from the starter. The DLC shows the following messages:
The interior of the car is fully operational -- all BCM-related stuff seems to work (windows, lights, door locks, stereo, HVAC, trunk, wipers, etc.). But the car simply won't start. I'm also puzzled by the fuel gauge reading zero.
I replaced the battery today with a brand new 600+ CCA unit from AutoZone, but this didn't fix the problem.
I used a code scanner and got the following codes:
While I can successfully clear the ECM codes, when I try to clear the TCM codes, I get an error and the codes stay.
I stopped by a local dealership and their service desk was kind enough to print out a small pile of documents regarding the U0100 and U0101 errors. Based on GM document 2133282 ("DTC-U0100-U02FF") it sounds like the issue stems from a faulty ground to either the ECM or TCM, or an issue with the serial data connection between the modules.
I did some initial troubleshooting such as confirming that the ECM is getting a good ground, but it started getting dark and bitterly cold, so I stopped for the evening.
I plan on going through the rest of the procedure tomorrow to check the B+ and ignition circuit terminals for the ECM.
Questions:
Thanks!
I've had my 2012 Cruze for almost three years and driven it to 58K miles with absolutely no issues. It's been about as problem-free as I could ask for.
I recently started working from home, and I haven't driven my car in over a month. I decided to sell it, but yesterday when I went to start it, it wouldn't crank.
When I try to start it, there is no activity from the starter. The DLC shows the following messages:
- Service Stabilitrak
- Service Traction Control
- Power Steering
- Fuel Level Low (I am 100% sure there is just under half a tank of fuel left. The odometer hasn't changed since I last drove the car)
The interior of the car is fully operational -- all BCM-related stuff seems to work (windows, lights, door locks, stereo, HVAC, trunk, wipers, etc.). But the car simply won't start. I'm also puzzled by the fuel gauge reading zero.
I replaced the battery today with a brand new 600+ CCA unit from AutoZone, but this didn't fix the problem.
I used a code scanner and got the following codes:
- ECM U0100
- TCM U0101
While I can successfully clear the ECM codes, when I try to clear the TCM codes, I get an error and the codes stay.
I stopped by a local dealership and their service desk was kind enough to print out a small pile of documents regarding the U0100 and U0101 errors. Based on GM document 2133282 ("DTC-U0100-U02FF") it sounds like the issue stems from a faulty ground to either the ECM or TCM, or an issue with the serial data connection between the modules.
I did some initial troubleshooting such as confirming that the ECM is getting a good ground, but it started getting dark and bitterly cold, so I stopped for the evening.
I plan on going through the rest of the procedure tomorrow to check the B+ and ignition circuit terminals for the ECM.
Questions:
- Where is the TCM located on these cars? I saw a few connectors on the transmission itself but it wasn't clear if they go back to an external module other than the ECM.
- Are there any other troubleshooting steps I should try besides the voltage / continuity tests listed in the GM document? For example, is there some trick like cutting battery power or pulling specific fuses for a certain amount of time to "reset" everything?
Thanks!