Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H4OL
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [02/2019 -           ]
Title: HYBRID / BATTERY CONTROL: REAR MOTOR GENERATOR CONTROL SYSTEM: P0AF21C; Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range; 2019 - 2024 MY RAV4 HV [02/2019 -        ]

DTC

P0AF21C

Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range

DTC SUMMARY

MALFUNCTION DESCRIPTION

These DTCs indicate that the rear motor inverter temperature sensor value is abnormal. The cause of this malfunction may be one of the following:

Internal inverter malfunction

  • Inverter with converter assembly internal circuit malfunction

Hybrid cooling system malfunction

  • Coolant circulation abnormal (frozen or leaking, etc.)

Inverter low-voltage circuit malfunction

  • The connectors are not connected properly

DESCRIPTION

The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, detects the temperature of the rear motor inverter using the rear motor inverter temperature sensor. If necessary, the motor generator control ECU (MG ECU) will limit inverter output to help prevent the rear motor inverter from overheating. The motor generator control ECU also detects malfunctions in the sensor based on the temperature sensor values.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0AF21C

Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range

The actual rear motor inverter temperature high and the difference between the estimated rear motor inverter temperature and the actual temperature exceeds a threshold for 10 seconds, or after a long soak, the rear motor inverter temperature sensor value differs from the values of other sensors.

(1 trip detection logic)
  • Inverter cooling system
  • Cooling fan system
  • Grille shutter system
  • Inverter with converter assembly
  • Wire harness or connector

Comes on

Master Warning:

Comes on

Related Data List

DTC No.

Data List

P0AF21C
  • Rear Motor Inverter Temperature
  • Inverter Coolant Temperature

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 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: REAR MOTOR GENERATOR CONTROL SYSTEM: UTILITY

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Turn the ignition switch to ON (READY).
  7. Drive the vehicle for approximately 10 minutes with the value of Data List item "Inverter Coolant Temperature" 25°C (77°F) or more.
  8. Enter the following menus: Powertrain / Rear Motor Generator / 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, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for the Cooling System.

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): Cooling System

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the ignition switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: REAR MOTOR GENERATOR CONTROL SYSTEM: PRECAUTION

    HINT:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

    *a

    Without waiting for 10 minutes

NOTICE:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1.

GO TO MOTOR GENERATOR CONTROL SYSTEM

(a) Go to Motor Generator Control System.

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P0AF21C; Drive Motor Inverter Temperature Sensor "B" Circuit Voltage Out of Range

HINT:

For the P0AF21C inspection procedures, refer to the Motor Generator Control System section.

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