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DTC Troubleshooting: U0029 (107) - A/T

DTC U0029:
 F-CAN Malfunction (F-CAN bus OFF)
  1. Clear the DTC with the HDS.
  1. Start the engine, and run it at idle for at least 2 minutes.
  1. Check whether DTC U0029 is indicated in the DTCs/Freeze Data in PGM-FI Mode Menu with the HDS.
Is DTC U0029 indicated in the PGM-FI system?
YES -
NO -
Go to Step 4 .
  1. Check whether DTC U0029 is indicated in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC U0029 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0029 indicated?
YES -
If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 .
NO -
Go to Step 7 .
  1. Monitor the OBD status for U0029 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other DTCs were indicated on Step 6 , go to the indicated DTC's troubleshooting.■
NO -
Check for poor connections and loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 . If the HDS indicates NOT COMPLETED, return to Step 7 and recheck.