Section 5 (Engine Control System (3UZ-FE)): ECM: Installation

WARNING: This page is about a different car, the 2006 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSTALL ECM
1. Insert the ECM into the ECM box.
  
  Fig 1: Inserting ECM Into ECM Box
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  NOTE:
  - Insert the ECM into the ECM box with the nameplate facing the inside of the vehicle.
  - Make sure that there is no foreign matter on the gasket surface of the ECM box.
  - Insert the stud bolt on the vehicle rear side to the ECM first.
  - Make sure that stud bolts are securely installed into the front and rear bolt holes.
2. Install the ECM to the ECM box with the 2 nuts.
  
  Fig 2: Identifying ECM To ECM Box With Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf)
  
  NOTE: Be sure to first tighten the nut on the vehicle rear side.
3. Connect the wire harness.
  1. Connect the 5 ECM connectors.
  2. Install the 2 connector holders.
    NOTE: Be sure to securely connect the connector.
    
    Fig 3: Identifying Connector Holders
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL ECM COVER
1. Install the ECM cover with the 3 bolts.
  
  Fig 4: Locating ECM Cover Mounting Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf)
  
  NOTE: Make sure that the wire harness does not get caught between other parts.
INSTALL ENGINE ROOM SIDE COVER LH ( 6 )
INSTALL COOL AIR INTAKE DUCT SEAL ( 8 )
CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
PERFORM INITIALIZATION
1. Perform initialization (INITIALIZATION ).
  NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.