DTC    P0A78-508    Drive Motor "A" Inverter Performance

for Preparation Click here


DESCRIPTION

Refer to the description of the inverter. (Click here)
Upon receiving a Motor gate shutdown signal from the MG ECU, the inverter forcibly stops the Motor by turning off all power transistors that are actuating the Motor.
The MG ECU monitors the Motor gate shutdown signal and detects a malfunction.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
P0A78
508
Motor gate shutdown (MSDN) signal error
w/ converter inverter assembly (MG ECU)

MONITOR DESCRIPTION

The HV control ECU monitors the motor gate shutdown (MSDN) signal. If the HV control ECU detects a fault in the MSDN signal, the HV control ECU illuminates the MIL and sets a DTC.

INSPECTION PROCEDURE

1.READ OUTPUT DTC (HV)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC.

  1. Read output DTCs. (Click here)

    Result:
    DTCs except P0A78-508 are output.



YES
GO TO DTC CHART
NO

REPLACE W/ CONVERTER INVERTER ASSEMBLY