HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A78-510

DTC Code DTC Name
P0A78-510 Drive Motor "A" Inverter Performance

DESCRIPTION

For a description of the inverter.

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If the inverter receives a drive motor gate shutdown signal from the MG ECU, it will turn all power transistors off which are activating the drive motor to forcibly stop the drive motor operation.

The MG ECU monitors drive motor gate shutdown signals and detects a malfunction.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P0A78-510 Drive Motor "A" Inverter Performance Drive motor inverter gate malfunction Inverter with converter assembly

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0A78-510

  • Drive Motor Inverter Shutdown Request

  • Drive Motor Execution Torque

CAUTION / NOTICE / HINT

Note

When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).

Tech Tips


  • When P0A78-510 has been stored, the hybrid system cannot be restarted until the DTC is cleared.

  • If the problem symptom cannot be reproduced, leaving the vehicle with the power switch on (READY) and neutral (N) selected for 1 minute will make it easier to reproduce the symptom.

  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Turn the power switch off and wait for 3 minutes or more.

    2. Turn the power switch on (READY).

    3. With the vehicle stopped and park (P) selected, move the shift lever to N, wait for 10 seconds and then push the P position switch.

PROCEDURE


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

    Result
    Proceed to
    OK
    NG

    OK

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    NG

    CONNECT SECURELY