2012 Honda Fit Base, Automatic TransFACTORY OEM SERVICE PROCEDURE

DTC P1659: ETCS Control Relay OFF Malfunction

NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .
  • Information marked with an asterisk (*1) applies to '09-10 models and '11-12 models (M/T).
  • Information marked with an asterisk (*2) applies to '11-12 models (A/T).
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1659 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 ETCS control relay and the ECM/PCM.

  4. Turn the ignition switch to LOCK (0).
  5. Check the No. 52 DBW (ETCS) (15 A) fuse in the under-dash fuse/relay box.

    Is the fuse OK? 

    YES:  Go to step  6.

    NO:  Go to step  19.

  6. Open the fuse access panel (A), then remove the ETCS control relay (B) from the under-dash fuse/relay box.
    Fig 1: Identifying Fuse Access Panel & ETCS Control Relay
    G05953040Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Test the ETCS control relay (see POWER RELAY TEST ).

    Is the ETCS control relay OK? 

    YES:  Go to step  8.

    NO:  Replace the ETCS control relay, then go to step  25.

  8. Turn the ignition switch to ON (II).
  9. Measure the voltage between ETCS control relay 4P connector terminal No. 3 and body ground.

    Is there battery voltage? 

    YES:  Go to step  10.

    NO:  Replace the under-dash fuse/relay box (see UNDER-DASH FUSE/RELAY BOX ), then go to step  24.

    Fig 2: Checking Voltage Between ETCS Control Relay 4P Connector Terminal No. 3 & Body Ground
    G05953041Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Measure the voltage between ETCS control relay 4P connector terminal No. 2 and body ground.

    Is there battery voltage? 

    YES:  Go to step  11.

    NO:  Replace the under-dash fuse/relay box (see UNDER-DASH FUSE/RELAY BOX ), then go to step  24.

    Fig 3: Checking Voltage Between ETCS Control Relay 4P Connector Terminal No. 2 & Body Ground
    G05953042Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect ECM/PCM connector C (49P).
  14. Connect ETCS control relay 4P connector terminal No. 1 to body ground with the jumper wire.
    Fig 4: Connecting ETCS Control Relay 4P Connector Terminal No. 1 To Body Ground With Jumper Wire
    G05953043Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Check for continuity between ECM/PCM connector terminal C1 and body ground.

    Is there continuity? 

    YES:  Go to step  16.

    NO:  Repair open in the wire between the ECM/PCM (CD and the ETCS control relay, then go to step  25.

    Fig 5: Checking Continuity Between ECM/PCM Connector Terminal C1 & Body Ground
    G05953044Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Disconnect ECM/PCM connector A (49P).
  17. Connect ETCS control relay 4P connector terminal No. 4 to body ground with the jumper wire.
    Fig 6: Connecting ETCS Control Relay 4P Connector Terminal No. 4 To Body Ground With Jumper Wire
    G05953045Courtesy of AMERICAN HONDA MOTOR CO., INC.
  18. Check for continuity between ECM/PCM connector terminal A21 and body ground.

    Is there continuity? 

    YES:  Go to step  30.

    NO:  Repair open in the wire between the ECM/PCM (A21) and the ETCS control relay, then go to step  25.

    Fig 7: Checking Continuity Between ECM/PCM Connector Terminal A21 & Body Ground
    G05953046Courtesy of AMERICAN HONDA MOTOR CO., INC.
  19. Open the fuse access panel (A), then remove the ETCS control relay (B) from the under-dash fuse/relay box.
    Fig 8: Identifying Fuse Access Panel & ETCS Control Relay
    G05953047Courtesy of AMERICAN HONDA MOTOR CO., INC.
  20. Jump the SCS line with the HDS.
  21. Disconnect ECM/PCM connector C (49P).
  22. Check for continuity between ECM/PCM connector terminal C1 and body ground.

    Is there continuity? 

    YES:  Repair short in the wire between the ECM/PCM (C1) and the ETCS control relay, then go to step  25.

    NO:  Go to step  23.

    Fig 9: Checking Continuity Between ECM/PCM Connector Terminal C1 & Body Ground
    G05953048Courtesy of AMERICAN HONDA MOTOR CO., INC.
  23. Check for continuity between ETCS control relay 4P connector terminal No. 2 and body ground.

    Is there continuity? 

    YES:  Replace the under-hood fuse/relay box (see UNDER-DASH FUSE/RELAY BOX ), then go to step  25.

    NO:  Go to step  30.

    Fig 10: Checking Continuity Between ETCS Control Relay 4P Connector Terminal No. 2 & Body Ground
    G05953049Courtesy of AMERICAN HONDA MOTOR CO., INC.
  24. Turn the ignition switch to LOCK (0).
  25. Reconnect all connectors.
  26. Turn the ignition switch to ON (II).
  27. Reset the ECM/PCM with the HDS.
  28. Do ECM/PCM IDLE LEARN PROCEDURE .
  29. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1659 indicated? 

    YES:  Check for poor connections or loose terminals at the ETCS control relay 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.

  30. Reconnect all connectors.
  31. Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
  32. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1659 indicated? 

    YES:  Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step  1.

    NO:  If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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