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HOMESERVICE MANUALSTOYOTA2025CAMRY LE, 2.5L ENG VIN AREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM - SERVICE INFORMATIONECMREMOVAL [04/2024 - ]PROCEDURE
2025 Toyota Camry LE, 2.5L Eng VIN A

Removal [04/2024 - ]: Procedure

2025 Toyota Camry LE, 2.5L Eng VIN ASECTION Procedure
  1. PRECAUTION 
    NOTE:
    • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.

      Refer to BEFORE DISCONNECTING BATTERY [04/2024 - ]

    • 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.

    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.

    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 ignition switch to ON (READY) and wait for 5 minutes or more.
      5. Turn the ignition 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 ignition switch can be turned to 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 LUGGAGE TRIM SERVICE HOLE COVER 

    Refer to PROCEDURE - Step 2

  3. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to PROCEDURE - Step 3

  4. REMOVE ECM 
    1. GTY1270442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Rotate the 2 levers while pushing the locks, and disconnect the 2 ECM connectors.
        NOTE:

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

      2. Remove the bolt and disengage the clamp to separate the engine wire.
      3. Remove the 2 nuts and ECM.
        NOTE:

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

  5. REMOVE NO. 1 ECM BRACKET 
    1. GTY1263907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE NO. 2 ECM BRACKET 
    1. GTY1263906Courtesy 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.