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HOMESERVICE MANUALSTOYOTA2020RAV4 XLE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 25 (ENGINE CONTROL SYSTEM (A25A-FXS) - SERVICE INFORMATION)ECMREMOVAL [10/2022 - 10/2023]PROCEDURE
2020 Toyota RAV4 XLE, AWD

Removal [10/2022 - 10/2023]: Procedure

2020 Toyota RAV4 XLE, AWDSECTION Procedure
WARNING: This page is about a different variant/trim than selected.
  1. PRECAUTION (for LITHIUM-ION BATTERY) 

    HV battery learning values are stored in the battery ECU assembly and ECM and are used to detect malfunctions and illuminate the hybrid battery indicator light in the combination meter assembly. When either of these ECUs is replaced, the new ECU receives the HV battery learning values from the other ECU and stores them.

    NOTE:
    • Do not replace the battery ECU assembly and ECM at the same time as the HV battery learning values will be lost. However, if it is necessary to replace both ECUs at the same time, replace them by following the procedure below.
    • Do not replace the battery ECU assembly or ECM with a used one from another vehicle.
    1. Procedure when replacing both battery ECU assembly and ECM:
      1. Disconnect the cable from the negative (-) auxiliary battery terminal.
      2. Replace either ECU.
      3. Connect the cable to the negative (-) auxiliary battery terminal.
      4. Turn the power switch on (READY) and wait for 5 minutes or more.
      5. Turn the power switch off and disconnect the cable from the negative (-) auxiliary battery terminal.
      6. Replace the other ECU.
      7. Connect the cable to the negative (-) auxiliary battery terminal.
      8. Check that the power switch can be turned on (READY).

        HINT: 

        If the battery ECU assembly and ECM are replaced at the same time without following the above procedure, replace either the battery ECU assembly and ECM with its original one and then replace it again by following the above procedure. If the correct procedure is not followed, perform the procedure again from the beginning.

  2. REMOVE DECK BOARD ASSEMBLY 

    Refer to PROCEDURE - Step 2

  3. REMOVE REAR NO. 2 FLOOR BOARD 

    Refer to PROCEDURE - Step 3

  4. REMOVE BATTERY HOLE COVER 

    Refer to PROCEDURE - Step 4

  5. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to PROCEDURE - Step 5

  6. REMOVE ECM 
    1. Push in the locks on the 2 levers, raise the 2 levers, and disconnect the 2 ECM connectors.
      GTY918751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.

    2. Remove the bolt and detach the clamp.
    3. Remove the 2 nuts and bolt.
      GTY868573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the ECM.
      NOTE:

      If the ECM has been struck or dropped, replace it.

  7. REMOVE NO. 1 ECM BRACKET 
    1. Remove the 2 screws and No. 1 ECM bracket from the ECM.
      GTY868576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE NO. 2 ECM BRACKET 
    1. Remove the 2 screws and No. 2 ECM bracket from the ECM.
      GTY868574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.