DTC P0A78-278 Drive Motor "A" Inverter Performance; DTC P0A78-280 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 )
If the Motor inverter detects a circuit malfunction or over voltage, the inverter transmits this information to the OVH terminal of the MG ECU via the motor inverter stop signal line. The MG ECU monitors the motor inverter stop signal line and detects a malfunction.
DTC DETECTION TROUBLE CONDITION
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 278 | Short to +B in the motor inverter stop (OVH) signal line | w/ converter inverter assembly (MG ECU) |
| 280 | Open or short to GND in the motor inverter stop (OVH) signal line | w/ converter inverter assembly (MG ECU) |