2008 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Engine Control System - Circuit Tests, Component Removal, Inspection & Installation: ECM: Installation

  1. INSTALL ECM 
    1. Install the 2 ECM brackets with the 4 screws
    2. Install the ECM with the 2 nuts

      Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) 

      Fig 1: Locating ECM Nuts
      G04943043Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the 6 ECM connectors.
  2. CONNECT NO. 2 CONNECTOR HOLDER 
    1. Attach the 2 claws to connect the connector holder.
      2. Fig 2: Locating No. 2 Connector Holder
      G05771232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the 2 engine wire connectors.
  3. INSTALL HYBRID VEHICLE CONTROL ECU 
    1. Install the ECU with the 2 nuts.

      Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) 

      Fig 3: Locating Hybrid Vehicle Control ECU And Nuts
      G05771231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the 4 ECU connectors
  4. INSTALL ENGINE ROOM ECU COVER 
    1. Install the ECU cover with the 3 bolts.

      Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) 

      Fig 4: Locating ECU Cover And Bolts
      G05771230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL ENGINE ROOM SIDE COVER LH  (See INSTALLATION )
  6. INSTALL AIR CLEANER INLET COVER SUB-ASSEMBLY  (See INSTALLATION )
  7. INSTALL SERVICE PLUG GRIP  (See INSPECTION )
  8. INSTALL BATTERY SERVICE HOLE COVER  (See INSTALLATION )
  9. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
    NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  10. INSTALL BATTERY SERVICE HOLE COVER LH  (See INSTALLATION )
  11. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY  (See INSTALLATION )
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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