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Removal [09/2014 - 11/2017]: Procedure

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE:

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

    Refer to INITIALIZATION [09/2014 - 10/2015] , or refer to INITIALIZATION [10/2015 - 11/2017]

  2. REMOVE ENGINE ROOM ECU COVER 
    NOTE:
    • Remove all water on and around the engine room ECU cover.
    • Perform the inspection indoors to avoid rain.
    • Be sure to prevent water intrusion to the ECM (connectors and screw parts).
    1. Remove the 3 bolts and engine room ECU cover.
      GTY504692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. DISENGAGE WIRE HARNESS 
    1. Disconnect the engine wire harness connector (A) as shown in the illustration.
      GTY513606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 2 engine wire harness connectors (B).
    3. Using a screwdriver, disengage the claw.
      GTY504683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disengage the guide and disconnect the connector holder from the engine room ECU box.
    5. Disconnect the 6 ECM connectors and disengage the wire harness from the engine room ECU box.
      GTY515747Courtesy 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.

    6. for AA81E:
      1. Disconnect the transmission control ECU assembly connector.
        GTY504687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Disengage the wire harness clamp.
      GTY519076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Disengage the wire harness from the engine room ECU box.
  4. REMOVE ECM 
    1. Remove the 2 nuts and ECM from the engine room ECU box.
      NOTE:

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

      GTY410798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE NO. 1 ECM BRACKET 
    1. Remove the 2 screws and No. 1 ECM bracket from the ECM.
      GTY417832Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE NO. 2 ECM BRACKET 
    1. Remove the 2 screws and No. 2 ECM bracket from the ECM.
      GTY404553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002