P0A78-586

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A78-586: Drive Motor "A" Inverter Performance
P0A78-586 - Drive Motor "A" Inverter Performance

DESCRIPTION

Refer to the description for DTC P0A78-266 P0A78-266

The signal line from the inverter voltage (VH) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0A78-586 is output, replace the inverter with converter assembly.





MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors the inverter voltage (VH) sensor signal. If the hybrid vehicle control ECU detects a fault in the sensor signal, the hybrid vehicle control ECU interprets this as a VH sensor failure. The hybrid vehicle control ECU 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 shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the SOC to a sufficient level.

7. Push the P position switch, check that the engine is stopped.

8. Set the A/C for maximum cooling.

9. Leave the vehicle for a few minutes.

HINT
During step 9, make sure that the engine is stopped. If the engine starts, restart from step 6.

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

11. Check that permanent DTCs are cleared.

12. 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 DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:









HINT
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
- P0A78-586 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

(e) Turn the power switch off.

B -- GO TO DTC CHART Hybrid Control System

A -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components