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Home >> Honda >> 2015 >> CR-Z Base, Standard Trans >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> IMA System >> DTC Troubleshooting >> DTC P1437: Motor Power Inverter (MPI) Module Short Circuit
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DTC P1437: Motor Power Inverter (MPI) Module Short Circuit

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. Turn the ignition switch to LOCK (0), and wait 1 minute.
  4. Start the engine, and let it idle for 1 minute under these conditions:
    • Headlights on high beam
    • Blower fan at maximum speed
    • Rear window defogger on
  5. Monitor the OBD STATUS for P1437 in the DTCs MENU with the HDS.

    Does the HDS indicate FAILED? 

    YES  -Go to step  6.

    NO  -If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, go to step  1.

  6. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P06B1, P0AA6, P1440, P15A5, or P1634 indicated? 

    YES  -Go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -Replace the MPI module (see MOTOR POWER INVERTER (MPI) MODULE REMOVAL/INSTALLATION  ), then go to step  7.

  7. Turn the ignition switch to ON (II).
  8. Clear the DTC with the HDS (see DTC CLEAR  ).
  9. Turn the ignition switch to LOCK (0), and wait 1 minute.
  10. Start the engine, and let it idle for 1 minute under these conditions:
    • Headlights on high beam
    • Blower fan at maximum speed
    • Rear window defogger on
  11. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1437 indicated? 

    YES  -Check for poor connections or loose terminals at the MPI module, then go to step  1.

    NO  -Go to step  12.

  12. Monitor the OBD STATUS for P1437 in the DTCs MENU with the HDS.

    Does the HDS indicate PASSED? 

    YES  -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step  11, go to the indicated DTC'S TROUBLESHOOTING .

    NO  -If the HDS indicates FAILED, check for poor connections or loose terminals at the DC-DC converter and the MPI module, then go to step  1. If the HDS indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.

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