Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001RV6Z
Model Year Start: 2021 Model: RAV4 HV Prod Date Range: [08/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1474; A/C Inverter Malfunction; 2021 - 2025 MY RAV4 HV [08/2020 -        ]

DTC

B1474

A/C Inverter Malfunction

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B1474

A/C Inverter Malfunction
  • Diagnosis condition: Ignition switch ON (READY)
  • Malfunction status: The inverter internal temperature is outside the specified range (exceeds the maximum)
  • Detection time: None
  • Compressor with motor assembly
  • CAN communication system

Memorized

CAUTION / NOTICE / HINT

CAUTION:

  • Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Carry the removed service plug in your pocket to prevent other technicians from accidentally reconnecting it while you are servicing the vehicle.
  • Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

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.
    • for AWD: 2019 - 2025 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): PRECAUTION
    • for LITHIUM-ION BATTERY: 2020 - 2025 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): PRECAUTION
  • The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs from these systems are output simultaneously.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check if the CAN communication system is functioning normally.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B
A

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY 2021 MY RAV4 HV [08/2020 - 12/2021]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FXS): REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FXS): REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FXS): REMOVAL 2024 - 2025 MY RAV4 HV [10/2023 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FXS): REMOVAL

B

GO TO CAN COMMUNICATION SYSTEM