ECM REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the ECM removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced
Replacement Part or Procedure Necessary Procedure Effect/Inoperative when not Performed Link
Disconnect cable from negative battery terminal Memorize steering angle neutral point Simple intelligent parking assist system*1

Click here

Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)*1
Initialize back door lock Power door lock control system

Click here

Replacement of ECM Perform Vehicle Identification Number (VIN) registration MIL comes on

Click here

ECU Communication ID Registration (Immobiliser system) Engine start function See Service Bulletin for the registration method.
Perform code registration (Immobiliser system)

  • Wireless door lock control system

  • Entry and start system

  • Engine start function

  • Steering lock system

 See Service Bulletin for the registration method. (w/ Entry and Start System)
Engine starting See Service Bulletin for the registration method. (w/o Entry and Start System)

Perform the following procedures in the order shown:


  1. Reset memory

  2. Deceleration sensor zero point calibration

  3. CVT oil pressure calibration

 Deterioration of fuel efficiency

Click here

*1: When performing learning using the GTS.
Click here Click here

PROCEDURE


  1. PRECAUTION

    Note


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

      Click here

    • Perform the Vehicle Identification Number (VIN) registration when replacing the ECM.

      Click here

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

    Click here

    Note

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Click here

  3. REMOVE NO. 2 CYLINDER HEAD COVER

    Click here

  4. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE

    Click here

  5. REMOVE RADIATOR COVER

    Click here

  6. REMOVE NO. 1 AIR CLEANER INLET

    Click here

  7. REMOVE AIR CLEANER CASE SUB-ASSEMBLY


    1. B008LNQ

      Remove the air cleaner filter element sub-assembly from the air cleaner case sub-assembly.

    2. B008LE6

      Remove the 2 bolts and air cleaner case sub-assembly from the vehicle.

  8. REMOVE ECM


    1. B008KCD

      Raise the 2 levers while pushing the locks on the levers, and disconnect the 2 ECM connectors.

      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. B008LWT

      Remove the No. 1 relay block cover from the No. 1 engine room relay block.

    3. B008MAZ

      Disconnect the 3 connectors from the engine room relay block assembly.

    4. Disengage the 2 claws to separate the engine wire from the No. 1 engine room relay block.

    5. B008KEF

      Remove the bolt, nut and ECM.

      Note

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

  9. REMOVE NO. 1 ECM BRACKET


    1. B008KIL

      Remove the 2 screws and No. 1 ECM bracket from the ECM.

  10. REMOVE NO. 2 ECM BRACKET


    1. B008L5A

      Remove the 2 screws and No. 2 ECM bracket from the ECM.