Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Motor Shutdown Stuck Off (P1C6A9F)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The hybrid vehicle control ECU detects malfunctions which prevent the motor (MG2) inverter shutdown circuit shutting down the hybrid vehicle control system. Detection is performed during the shutdown sequence when the power switch is turned off. If motor (MG2) inverter operation is detected after a shutdown signal was sent to the motor (MG2) inverter, the hybrid vehicle control ECU will determine that there is a malfunction and store this DTC.

The cause of this malfunction may be the following:

• Inverter with converter assembly malfunction

DESCRIPTION

The motor generator control ECU (MG ECU) sends shutdown signals to the inverter to cut the power supply to the generator (MG1) and motor (MG2). If the power switch is turned off, the motor generator control ECU (MG ECU) will send a GSDN (MG1 Shutdown Signal) signal and MSDN (MG2 shutdown signal) signal to check the function of the HV gate block. If a shutdown malfunction is detected, this DTC will be stored.

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here

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 and wait for 2 minutes or more.
5. Turn the power switch on (READY) and wait for 30 seconds or more.
6. Turn the power switch off and wait for 2 minutes or more.
7. Turn the power switch on (IG) and turn the Techstream on.
8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
9. Check the DTC judgment result.

   HINT:

   • If the judgment result shows NORMAL, the system is normal.
   • If the judgment result shows ABNORMAL, the system has a malfunction.
   • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

PROCEDURE

Click here

NEXT

END