Section 9 (Engine Control System (3UZ-FE)): ECM: Removal

WARNING: This page is about a different car, the 2007 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
REMOVE COOL AIR INTAKE DUCT SEAL (See REMOVAL )
REMOVE ENGINE ROOM SIDE COVER LH (See REMOVAL )
REMOVE ECM COVER
1. Remove the 3 bolts and ECM cover.
  NOTE:
  - Make sure there is no water on or around the ECM cover.
  - Perform the inspection indoors to avoid rain.
  - Prevent water from contacting the ECM's connectors and screw areas.
  Fig 1: Locating Bolt And ECM Cover
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM
1. Disconnect the wire harness.
  1. Using a screwdriver, disconnect the 2 connector holders.
  2. Disconnect the 5 ECM connectors.
  Fig 2: Identifying Connector Holder
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the 2 nuts and ECM from the ECM box.
  
  Fig 3: Locating Nuts And ECM Box
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002