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 error Inverter with converter assembly

PROCEDURE


  1. CHECK DTC OUTPUT (HV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    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
      P0A60 (all INF codes) *1 Drive Motor "A" Phase V Current
      P0A63 (all INF codes) *1 Drive Motor "A" Phase W Current
      P0A78-113, 287, 505, 506 Drive Motor "A" Inverter Performance

      Tech Tips


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


      • P0A51-174 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.


    B

    GO TO DTC CHART Click here

    A

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

    Note

    Before disconnecting the connectors, confirm that they are properly connected by checking that the locking claws are engaged and that the connectors do not pull out.


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

      A000XTSE01
      *1 Inverter with Converter Assembly
      *2 for LHD:
      *3 for RHD:
      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.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    CONNECT SECURELY