DTC Troubleshooting: U0155 (126)
  1. Check for continuity between ECM/PCM connector terminal A37 and body ground.
Is there continuity?
YES -
Substitute a known-good gauge control module, then go to Step 14 and recheck. If DTC U0155 is not indicated, replace the original gauge control module, then go to Step 14 .
NO -
Repair open in the wire between the ECM/PCM (A37) and the gauge control module, then go to Step 14 .
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Do the ECM/PCM idle learn procedure.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0155 indicated?
YES -
Check for poor connections or loose terminals at the gauge control module and the ECM/PCM, 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.■