2012 Toyota Prius ThreeFACTORY OEM SERVICE PROCEDURE

Section 40 (Engine Control System (Plug-In) (Service Information)): ECM: Installation: Installation

WARNING: This page is about a different variant/trim than selected.
  1. INSTALL ECM 
    1. Install the ECM with the 2 bolts.
      Fig 1: Identifying ECM Brackets & Bolts
      GTY216016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 13 N*m (133 kgf*cm, 10 ft.*lbf) 

    2. Install the 3 wire harness clamps.
      Fig 2: Identifying Wire Harness Clamps
      GTY229016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the 2 ECM connectors.
      1. Connect the 2 ECM connectors and lower the 2 levers.
        Fig 3: Identifying ECM Connectors & Lower Levers
        GTY227210Courtesy 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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