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Home >> Lexus >> 2008 >> LS 600hL >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Control System - Circuit Tests, Component Removal, Inspection & Installation >> ECM >> Removal
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Engine Control System - Circuit Tests, Component Removal, Inspection & Installation: ECM: Removal

  1. REMOVE LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY  (See REMOVAL )
  2. REMOVE BATTERY SERVICE HOLE COVER LH  (See REMOVAL )
  3. 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.
    NOTE:
    • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
    • After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
  4. REMOVE BATTERY SERVICE HOLE COVER  (See REMOVAL )
  5. REMOVE SERVICE PLUG GRIP  (See REMOVAL )
  6. REMOVE AIR CLEANER INLET COVER SUB-ASSEMBLY  (See REMOVAL )
  7. REMOVE ENGINE ROOM SIDE COVER LH  (See REMOVAL )
  8. REMOVE ENGINE ROOM ECU COVER 
    NOTE:
    • Wipe off any water on or around the ECU cover.
    • Perform these procedures in a dry place away from rain, etc.
    • Do not allow water to enter the ECM through its connectors areas, screw areas, etc.
    1. Remove the 3 bolts and ECU cover.
      Fig 1: Locating ECU Cover And Bolts
      G05771230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE HYBRID VEHICLE CONTROL ECU 
    1. Disconnect the 4 ECU connectors.
    2. Remove the 2 nuts and ECU
      Fig 2: Locating Hybrid Vehicle Control ECU And Nuts
      G05771231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. DISCONNECT NO. 2 CONNECTOR HOLDER 
    1. Disconnect the 2 engine wire connectors.
    2. Disconnect the 2 claws with the connector holder.
      Fig 3: Locating No. 2 Connector Holder
      G05771232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE ECM 
    1. Disconnect the 6 ECM connectors
    2. Remove the 2 nuts and ECM.
      3. Fig 4: Locating ECM Nuts
      G05771233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 4 screws and 2 ECM brackets from the ECM
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