Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001R5PQ
Model Year Start: 2021 Model: RAV4 HV Prod Date Range: [08/2020 - 12/2021]
Title: A25A-FXS (COOLING): THERMOSTAT: REMOVAL; 2021 MY RAV4 HV [08/2020 - 12/2021]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during water inlet with thermostat sub-assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedures are not Performed

Link
  • Replacement of throttle body with motor assembly
  • Replacement of EGR valve assembly
  • Gas leaks from exhaust system

Inspection after repair
  • Poor idle, etc.
  • Engine start function, etc.

2021 MY RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NOTICE:

  • After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) auxiliary battery terminal.

    Waiting Time before Disconnecting Cable from Negative (-) Auxiliary Battery Terminal

    System Name

    See Procedure

    Vehicle enrolled in Toyota Audio Multimedia system or safety connect system

    6 minutes

    Vehicle not enrolled in Toyota Audio Multimedia system and safety connect system

    1 minute
  • This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

    Click here 2019 - 2025 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1. DRAIN ENGINE COOLANT (for Engine)

Click here 2019 - 2021 MY RAV4 HV [02/2019 - 12/2021]; MAINTENANCE: A25A-FXS COOLANT (for Engine): REPLACEMENT+

2. REMOVE INTAKE MANIFOLD

Click here 2021 - 2025 MY RAV4 HV [08/2020 -        ]; A25A-FXS (INTAKE / EXHAUST): INTAKE MANIFOLD: REMOVAL

3. DISCONNECT NO. 2 RADIATOR HOSE

Click here 2021 MY RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

4. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

(a) Disconnect the water inlet with thermostat sub-assembly connector.

(b) Slide the clip and disconnect the No. 7 water by-pass hose from the water inlet with thermostat sub-assembly.

NOTICE:

  • Do not apply force to the water inlet with thermostat sub-assembly when disconnecting the No. 7 water by-pass hose.
  • Do not damage the water inlet with thermostat sub-assembly.

HINT:

When disconnecting the No. 7 water by-pass hose, slide the clip, rotate the hose and pull it straight off the pipe.

(c) Using an 8 mm socket wrench, remove the 2 bolts and water inlet with thermostat sub-assembly.

(d) Remove the gasket from the water inlet with thermostat sub-assembly.