2009 Lexus LS 460L AWDFACTORY OEM SERVICE PROCEDURE

Engine Control System - System Testing; Component Inspection, Removal & Installation: ECM: Installation

  1. INSTALL ECM 
    1. Install the ECM with the 2 nuts.

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

    2. Connect the 6 ECM connectors.
    Fig 1: Locating ECM Connectors With Nuts
    G06190164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CONNECT NO. 2 CONNECTOR HOLDER 
    1. Attach the 2 claws to connect the connector holder.
    2. Connect the 2 engine wire connectors.
    Fig 2: Locating No. 2 Connector Holder
    G06190165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL TCM 
    1. Install the TCM with the 2 nuts.

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

    2. Connect the 4 TCM connectors.
    Fig 3: Locating TCM Connectors
    G06190166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL ENGINE ROOM ECU COVER 
    1. Install the engine room ECU cover with the 3 bolts.

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

      Fig 4: Locating Engine Room ECU Cover Bolts
      G06190167Courtesy 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. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  8. INSTALL COWL TOP VENTILATOR LOUVER RH  (See INSTALLATION )
  9. PERFORM RESET MEMORY 
    NOTE: Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM.

    HINT:

    Initialization cannot be completed by only removing the battery.

  10. PERFORM INITIALIZATION 
    1. Perform initialization (See INITIALIZATION ).
      NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
Factory Service Tools

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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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