DTC Troubleshooting: U0103 (126)
DTC U0103:
 F-CAN Malfunction (ECM-TCM)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, 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 in the DTCs MENU with the HDS.
Is DTC U0103 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), the TCM, and the ECM.■
  1. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS again.
Are DTC U0028 and U0103 indicated at the same time?
YES -
NO -