HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A78-565

DTC Code	DTC Name
P0A78-565	Drive Motor "A" Inverter Performance

DESCRIPTION

For a description of the inverter, Click here.

If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU (HV CPU).

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0A78	565	Motor inverter overvoltage signal detection (circuit malfunction (VH sensor))	Inverter with converter assembly

INSPECTION PROCEDURE

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

With the vehicle engine stopped, the power switch on (READY) and park (P) selected, depress the accelerator pedal to start the engine.

PROCEDURE

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
CAUTION:

Be sure to wear insulated gloves.
1. Check that the service plug grip is not installed.
  
  Note
  
  After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
  
  Note
  
  Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.
2. Check the connection of the low voltage connector of the inverter with converter assembly.
  
  OK
  
  The connector is connected securely and there are no contact problems.
  
  Tech Tips
  
  When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.
NG
CONNECT SECURELY

OK

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here