P0A78-510

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A78-510: Drive Motor "A" Inverter Performance
P0A78-510 - Drive Motor "A" Inverter Performance

DESCRIPTION

For a description of the inverter, P0A78-266.

If the inverter receives a motor gate shutdown signal from the MG ECU, it will turn all power transistors off which are activating MG2 to forcibly stop MG2 operation.

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





HINT
- 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 the selector lever in N for 1 minute will make it easier to reproduce the symptom.

MONITOR DESCRIPTION

The MG ECU monitors the current to the MG2. The MG ECU checks if current passes to the MG2 while the vehicle is stopped with power switch on (IG) or the selector lever in N. If current flow is detected in either of these two situations, the power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY) and turn the Techstream on.

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

NOTICE:
Do not leave the vehicle for an extended time with the selector lever in N.

7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

8. Check that permanent DTCs are cleared.

9. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0343-747

NG -- CONNECT SECURELY

OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components