DTC Troubleshooting: U0155 (184)
DTC U0155:
 F-CAN Malfunction (ECM-Gauge control module)
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0155 indicated?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module (tach) and the ECM.■
  1. Check for Body Electrical DTCs in the DTCs MENU with the HDS.
Is DTC B1168, B1169, and/or B1178 indicated?
YES -
Go to Step 5 .
NO -
Do the gauge control module input test.
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Remove the gauge control module (tach).
  1. Disconnect the gauge control module (tach) 36P connector.
  1. Disconnect ECM connector No. 2 (58P).
  1. Connect ECM connector No. 2 terminal No. 47 to body ground with a jumper wire.