DTC Troubleshooting: U0101 (126)
  1. Check for continuity between ECM connector terminal A37 and TCM connector A (37P) terminal No. 33.
Is there continuity?
YES -
Update the TCM if it does not have the latest software, or substitute a known-good TCM, then go to Step 20 and recheck. If DTC U0101 is not indicated with a known-good TCM, replace the original TCM, then go to Step 20 .
NO -
Repair open in the wire between the ECM (A37) and the TCM, then go to Step 20 .
  1. Turn the ignition switch OFF.
  1. Install the TCM.
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the ECM idle learn procedure.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0101 indicated?
YES -
Check for poor connections or loose terminals at the gauge control module (tach), the TCM, and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■