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DTC U0114: F-CAN A Malfunction (PCM-SH-AWD Control Unit)

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. 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, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Turn the ignition switch to ON (II).
  2. Check for Pending or Confirmed DTCs with the HDS.

    Are DTC U0029 and U0114 indicated at the same time? 

    YES  -Go to troubleshooting for DTC U0029 (see DTC U0029: F-CAN A Malfunction (BUS-OFF (PCM))  ).

    NO  -Go to step 3.

  3. Clear the DTC with the HDS.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC U0114 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the SH-AWD control unit and the PCM.

  5. Check for communication to the SH-AWD system with the HDS.

    Does the HDS communicate with the SH-AWD control unit? 

    YES  -Go to step 6.

    NO  -Go to the SH-AWD symptom troubleshooting for SH-AWD indicator does not go off, and no DTCs are stored (see DTC 91-1: SH-AWD CONTROL UNIT PROGRAMMING ERROR ).

  6. Turn the ignition switch to LOCK (0).
  7. Jump the SCS line with the HDS.
  8. Disconnect SH-AWD control unit connector A (20P).
  9. Disconnect PCM connector A (49P).
  10. Check for continuity between PCM connector terminal A48 and SH-AWD control unit connector A (20P) terminal No. 10.
    Fig 1: Checking Continuity Between PCM Connector Terminal A48 And SH-AWD Control Unit Connector A (20P) Terminal No. 10
    G08057123Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 11.

    NO  -Repair an open in the wire between the PCM (A48) and the SH-AWD control unit, then go to step  12.

  11. Check for continuity between PCM connector terminal A49 and SH-AWD control unit connector A (20P) terminal No. 20.
    Fig 2: Checking Continuity Between PCM Connector Terminal A49 And SH-AWD Control Unit Connector A (20P) Terminal No. 20
    G08057124Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Update the SH-AWD control unit if it does not have the latest software (see SH-AWD® CONTROL UNIT UPDATE ), or substitute a known-good SH-AWD control unit (see SH-AWD® CONTROL UNIT REPLACEMENT ), then go to step 12 and recheck. If DTC U0114 is not indicated after substitution, replace the original SH-AWD control unit (see SH-AWD® CONTROL UNIT REPLACEMENT ), then go to step 12.

    NO  -Repair an open in the wire between the PCM (A49) and the SH-AWD control unit, then go to step 12.

  12. Reconnect all connectors.
  13. Turn the ignition switch to ON (II).
  14. Reset the PCM with the HDS.
  15. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  16. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC U0114 indicated? 

    YES  -Check for poor connections or loose terminals at the SH-AWD control unit and the PCM, then go to step  1.

    NO  -Troubleshooting is complete. If any other Pending or Confirmed DTCs indicated, go to the indicated DTC'S TROUBLESHOOTING .

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