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DTC P06B1: IMA Battery Current Sensor Circuit Malfunction

NOTE:
  • Before you troubleshoot, record all freeze data, and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION  ).
  • If the DTC cannot be cleared, do the troubleshooting for DTC U1204.
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS (see DTC CLEAR  ).
  3. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Go to step  4.

    NO  -Intermittent failure, the system is OK at this time.

  4. Turn the ignition switch to LOCK (0).
  5. Turn the battery module switch OFF (see TURNING OFF AND ON POWER TO THE HIGH VOLTAGE CIRCUIT  ).
  6. Do the 12 volt battery terminal disconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
  7. Remove the IPU cover (see IPU COVER REMOVAL/INSTALLATION  ).
  8. Remove the PCU lid, the PCU busplate, and the PCU cover (see IPU CASE REMOVAL/INSTALLATION  ).
  9. Remove the bolts (A), and disconnect the MCM connector E (B), then move the MCM aside.
    Fig 1: MCM Connector E With Bolts With Torque Specifications
    G06950280Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Disconnect the four IMA motor power cables (A) from the phase motor current sensor, then wrap the end of the 12 volt power cable (B) with insulating tape.
    NOTE: Check the position of the U phase, the V phase, and the W phase cables before disconnecting them.
    Fig 2: IMA Motor Power Cables With Insulating Tape With Torque Specifications
    G06950281Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Remove the bolts (A) and the terminal cover (B).
    Fig 3: Terminal Cover With Bolts With Torque Specifications
    G06950282Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Disconnect the phase motor current sensor 9P connector (A).
    Fig 4: Identifying Phase Motor Current Sensor 9P Connector
    G06950283Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. Reconnect MCM connector E (31P).
  14. Do the 12 volt battery terminal reconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
  15. Clear the DTC with the HDS (see DTC CLEAR  ).
  16. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Go to step  17.

    NO  -Replace the phase motor current sensor (see MOTOR POWER INVERTER (MPI) MODULE REMOVAL/INSTALLATION  ), then go to step  27.

  17. Disconnect MCM connector C (22P).
  18. Clear the DTC with the HDS (see DTC CLEAR  ).
  19. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Go to step  22.

    NO  -Go to step  20.

  20. Check for continuity between MCM connector terminal C7 and body ground.
    Fig 5: Checking Continuity Between MCM Connector Terminal C7 And Body Ground
    G06950284Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C7), then go to step  27.

    NO  -Go to step  21.

  21. Check for continuity between MCM connector terminal C15 and body ground.
    Fig 6: Checking Continuity Between MCM Connector Terminal C15 And Body Ground
    G06950285Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C15), then go to step  27.

    NO  -Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C22), then go to step  27.

  22. Disconnect MCM connector B (24P).
  23. Clear the DTC with the HDS (see DTC CLEAR  ).
  24. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Go to step  37.

    NO  -Go to step  25.

  25. Disconnect the junction board 12P connector (A).
    Fig 7: Identifying Junction Board 12P Connector
    G06950286Courtesy of AMERICAN HONDA MOTOR CO., INC.
  26. Check for continuity between MCM connector terminal B17 and body ground.
    Fig 8: Checking Continuity Between MCM Connector Terminal B17 And Body Ground
    G06950287Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between the junction board 12P connector and the MCM (B17), then go to step  27.

    NO  -Replace the battery module (see BATTERY MODULE REMOVAL/INSTALLATION  ), then go to step  27.

  27. Reconnect all connectors.
  28. Reinstall the terminal cover.
  29. Reconnect the four IMA motor power cables to the phase motor current sensor.
    NOTE: Make sure the cables are correctly positioned before you reconnect them.
  30. Reinstall the MCM (see MOTOR CONTROL MODULE (MCM) REMOVAL/INSTALLATION  ).
  31. Reinstall the PCU cover, the PCU busplate, and the PCU lid (see IPU CASE REMOVAL/INSTALLATION  ).
  32. Reinstall the IPU cover (see IPU COVER REMOVAL/INSTALLATION  ), then turn the battery module switch ON (see TURNING OFF AND ON POWER TO THE HIGH VOLTAGE CIRCUIT  ).
  33. Do the 12 volt battery terminal reconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
  34. Turn the ignition switch to ON (II).
  35. Clear the DTC with the HDS (see DTC CLEAR  ).
  36. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Check for poor connections or loose terminals at the MCM, the phase motor current sensor, and the battery current sensor, 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 .

  37. Reconnect all connectors.
  38. Reinstall the terminal cover.
  39. Reconnect the four IMA motor power cables to the phase motor current sensor.
    NOTE: Make sure the cables are correctly positioned before you reconnect them.
  40. Reinstall the MCM (see IPU CASE REMOVAL/INSTALLATION  ).
  41. Reinstall the PCU cover, the PCU busplate, and the PCU lid (see IPU CASE REMOVAL/INSTALLATION  ).
  42. Reinstall the IPU cover (see IPU COVER REMOVAL/INSTALLATION  ), then turn the battery module switch ON (see TURNING OFF AND ON POWER TO THE HIGH VOLTAGE CIRCUIT  ).
  43. Do the 12 volt battery terminal reconnection procedure (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
  44. Update the MCM if it does not have the latest software (see MOTOR CONTROL MODULE (MCM) UPDATE  ), or substitute a known-good MCM (see SUBSTITUTING THE MCM  ).
  45. Turn the ignition switch to ON (II).
  46. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1 indicated? 

    YES  -Check for poor connections or loose terminals at the MCM, the phase motor current sensor, and the battery current sensor. If the MCM was updated, substitute a known-good MCM (see SUBSTITUTING THE MCM  ), then recheck. If the MCM was substituted, go to step  1.

    NO  -If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM (see IPU CASE REMOVAL/INSTALLATION  ). If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC'S TROUBLESHOOTING .

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