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 Lane departure alert system (w/ Steering Control)

Click here

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

Click here

Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)*2 Stop and start system

Click here

Replacement of ECM Perform Vehicle Identification Number (VIN) or frame number registration

  • MIL illuminates

  • DTC P0630 is stored

Click here

HEAVY KNOCK HISTORY

  • SAVE HISTORY

  • WRITE HISTORY

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

  • Smart 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)

  1. Reset Memory

  2. Deceleration Sensor 0 Point Calibration

  3. CVT Oil Pressure Calibration

 Deterioration of fuel efficiency

for K313 Click here

for K313F Click here

*1: When performing learning using the GTS.
Click here Click here
*2: w/ Stop and start system

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

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

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

      Click here

    • When replacing the ECM, use the GTS to save "Heavy Knock History" and then upload it to the new 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 RADIATOR COVER

    Click here

  4. REMOVE NO. 1 AIR CLEANER INLET

    Click here

  5. REMOVE AIR CLEANER CAP SUB-ASSEMBLY


    1. A001X8X

      Disconnect the mass air flow meter connector.

    2. Disengage the clamp from the air cleaner cap sub-assembly.

    3. A001WO7

      Disengage the 2 air cleaner cap sub-assembly clamps.

    4. A001UMR

      Disengage the 2 guides to separate the air cleaner cap sub-assembly from the air cleaner case sub-assembly.

    5. Loosen the hose clamp and remove the air cleaner cap sub-assembly from the air cleaner hose.

  6. REMOVE AIR CLEANER CASE SUB-ASSEMBLY

    Click here

  7. REMOVE ECM

    Tech Tips

    When replacing the ECM, use the GTS to save "Heavy Knock History" and then upload it to the new ECM.

    Click here


    1. A001SK6

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

    2. A001YEI

      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.

    3. A001SH6

      Disconnect the 3 connectors from the No. 1 engine room relay block.

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

    5. A001VEX

      Remove the bolt, nut and ECM.

      Note

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

  8. REMOVE NO. 1 ECM BRACKET


    1. A001T97

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

  9. REMOVE NO. 2 ECM BRACKET


    1. A001X9I

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