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Home >> Acura >> 2011 >> TL Base >> Repair and Diagnosis >> Engine Performance >> System >> PGM-FI System >> DTC Troubleshooting >> DTC U0114: F-CAN Malfunction (ECM/PCM-SH-AWD Control Unit)
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DTC U0114: F-CAN Malfunction (ECM/PCM-SH-AWD Control Unit)

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), or press the engine start/stop button to select the ON mode.
  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 MALFUNCTION (BUS-OFF (ECM/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 ECM/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 the SH-AWD indicator does not go off, and no DTCs are stored (see SYMPTOM TROUBLESHOOTING ).

  6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  7. Jump the SCS line with the HDS.
  8. Disconnect SH-AWD control unit connector A (20P).
  9. Disconnect ECM/PCM connector A (49P).
  10. Check for continuity between ECM/PCM connector terminals A48 and SH-AWD control unit connector A (20P) terminal No. 10.
    Fig 1: Checking Continuity Between ECM/PCM Connector Terminals A48 And SH-AWD Control Unit Connector A (20P) Terminal No. 10
    G06679669Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 11.

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

  11. Check for continuity between ECM/PCM connector terminal A49 and SH-AWD control unit connector A (20P) terminal No. 20.
    Fig 2: Checking Continuity Between ECM/PCM Connector Terminal A49 And SH-AWD Control Unit Connector A (20P) Terminal No. 20
    G06679670Courtesy 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 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), or press the engine start/stop button to select the ON mode.
  14. Reset the ECM/PCM with the HDS.
  15. Do the ECM/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 ECM/PCM, then go to step  1.

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

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