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
Replacement of ECM Vehicle Identification Number (VIN) registration MIL comes on / MIL does not come on
ECU communication ID registration (Immobiliser system) Engine start function See the Service Bulletin for the registration method.
Disconnect cable from negative battery terminal Memorize steering angle neutral point Parking assist monitor system

Click here

LKA/LDA system

Click here

Pre-crash safety system
Adaptive high beam system
Reset power trunk lid Power trunk lid system

Click here

Note


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


  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. PRECAUTION

    Note

    After turning the engine 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

  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 COOL AIR INTAKE DUCT SEAL

    Click here

  4. REMOVE ENGINE ROOM ECU COVER

    Note


    • Remove all water on and around the engine room ECU cover.

    • With the engine room ECU cover open, be careful to avoid contamination by foreign matter or by water from rain, etc.


    1. B002EYU

      Remove the 3 bolts and engine room ECU cover.

  5. DISCONNECT WIRE HARNESS


    1. B002CU0N01

      Push the lock and move the lock lever of connector (with lock) as shown in the illustration and disconnect the connector (A) (with lock) from the engine room ECU box.

    2. Disconnect the 2 engine wire harness connectors (B).

    3. B002DV8

      Using a screwdriver, disengage the claw.

    4. Disengage the guide and disconnect the connector holder from the engine room ECU box.

    5. B002DJW

      Disconnect the 6 ECM connectors and separate the wire harness from the engine room ECU box.

      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.

    6. B002EWB

      Disconnect the transmission control ECU assembly connector.

    7. B002EDZ

      Disengage the wire harness clamp.

    8. Separate the wire harness from the engine room ECU box.

  6. REMOVE ECM


    1. B002D2R

      Remove the 2 nuts and ECM from the engine room ECU box.

      Note


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

      • Pull the engine control ECU straight out to remove it.

  7. REMOVE NO. 1 ECM BRACKET


    1. B002DAI

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

  8. REMOVE NO. 2 ECM BRACKET


    1. B002CPJ

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