2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Engine Control System: ECM: Removal

  1. 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.
  2. REMOVE ECM BOX COVER 
    1. Remove the 3 bolts and ECM box cover.
      NOTE:
      • Make sure there is no water and / or foreign matter around the ECM box cover.
      • Perform the inspection indoors to avoid rain.
      • Prevent water from contacting the ECM's connectors and screw areas.
        Fig 1: Locating ECM Box Cover With Bolts
        G05291621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE ECM 
    1. Disconnect the 5 ECM connectors.
    2. Remove the 2 nuts and ECM from the ECM box.
      Fig 2: Locating ECM Box With Nuts
      G05291622Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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