Section 14 (Engine Control System - System And Circuit Testing, On-Vehicle Inspection, Removal, Inspection & Installation): ECM: Removal

WARNING: This page is about a different car, the 2008 Lexus GS 350. 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 BOX COVER
1. Remove the 3 bolts and cover.
  NOTE:
  - Remove all water on and around the cover.
  - Perform the inspection indoors to avoid rain.
  - Be sure to prevent water intrusion to the ECM (connectors and screw parts).
    
    Fig 1: Locating ECM Box Cover Bolts
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DISCONNECT WIRE HARNESS
1. Using a screw driver, detach the 2 claws.
  HINT:
  
  Tape the screwdriver tip before use.
2. Disconnect the 2 connector holders.
3. Disconnect the 6 connectors.
  
  Fig 2: Locating Connector Holders
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE ECM
1. Remove the 2 nuts and ECM.
  
  Fig 3: Locating ECM Connector Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002