HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A51-174

DTC Code DTC Name
P0A51-174 Drive Motor "A" Current Sensor Circuit

DESCRIPTION

The MG ECU located in the inverter with converter assembly monitors its internal operation and it will set DTCs when it detects malfunctions.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A51 174 Motor current sensor high resolution circuit signal is out of range or there is a difference between it and the motor current sensor low resolution circuit current value. Inverter with converter assembly

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      P0A51-174 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0A1B-505 Drive Motor "A" Control Module
      P0A40-506 Drive Motor "A" Position Sensor Circuit Range/Performance
      P0A78-113, 287 Drive Motor "A" Inverter Performance
      P0BEA-290 Drive Motor "A" Phase V Current Sensor Circuit Range/Performance
      P0BEE-298 Drive Motor "A" Phase W Current Sensor Circuit Range/Performance
      P1C3C-294 Drive Motor "A" Phase V Current Sensor Correlation
      P1C3D-302 Drive Motor "A" Phase W Current Sensor Correlation
      P1C4A-288 Drive Motor "A" Phase V Current Sensor Sub Circuit Range/Performance
      P1C4F-296 Drive Motor "A" Phase W Current Sensor Sub Circuit Range/Performance
      P1C6D-501 Drive Motor "A" Phase V Current Sensor Offset Range/Performance
      P1C6E-502 Drive Motor "A" Phase W Current Sensor Offset Range/Performance

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0A51-174 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

    5. Turn the power switch off.


    B
    A
  2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. B001L9I

      Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

    2. Check the connection of the low voltage connector of the inverter with converter assembly.

      OK
      The connector is connected securely and there are no contact problems.

      Tech Tips

      When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.


    OK
    NG