DTC P0A78-304 Drive Motor "A" Inverter Performance; DTC P0A78-305 Drive Motor "A" Inverter Performance: Description
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the description of the inverter. (See DTC P0A78-266 DRIVE MOTOR "A" INVERTER PERFORMANCE: DTC P0A78-267 DRIVE MOTOR "A" Inverter Performance ) 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 line and detects a malfunction.
DIAGNOSTIC TROUBLE CODE CHART
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 304 | Open or short to +B in the motor gate shutdown (MSDN) signal line | w/ converter inverter assembly (MG ECU) |
| 305 | Short to GND in the motor gate shutdown (MSDN) signal line | w/ converter inverter assembly (MG ECU) |