DTC U0029: F-CAN Malfunction (F-CAN Bus OFF)

WARNING: This page is about a different car, the 2013 Honda Odyssey, 2012 Honda Odyssey, and 2011 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Check for Pending or Confirmed DTCs in the PGM-FI SYSTEM with the HDS.
Is DTC U0029 indicated in the PGM-FI SYSTEM?

YES -Go to the DTC U0029 troubleshooting in the PGM-FI System (see DTC TROUBLESHOOTING ).

NO -Go to step 4.
Check for Pending or Confirmed DTCs in the A/T SYSTEM with the HDS.
Is DTC U0029 indicated in the A/T SYSTEM?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. If any other Pending or Confirmed DTCs were indicated, go to the INDICATED DTC'S TROUBLESHOOTING .
Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
Start the engine with the shift lever in P, and wait for at least 5 minutes.
Check for Pending or Confirmed DTCs in the A/T SYSTEM with the HDS.
Is DTC U0029 indicated in the A/T SYSTEM?

YES -Check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step 6. If the PCM was substituted, go to step 1.

NO -Go to step 8.
Monitor the OBD status for U0029 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?

YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ). If any other Pending or Confirmed DTCs were indicated in step 7, go to the INDICATED DTC'S TROUBLESHOOTING .

NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step 6. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 6.