2003 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Converter And Inverter Assembly: Removal

  1. REMOVE SERVICE PLUG (See  PRECAUTION  ) 
  2. DRAIN HV COOLANT (See  ON-VEHICLE REPAIR  ) 
  3. REMOVE COWL TOP PANEL (See  COMPONENTS  ) 
  4. VERIFY 0 V 
    NOTE:
    • Before starting step   a , 5 minutes or more should be passed after removing the service plug. 
    • Be careful to prevent foreign matter from entering the inside of connector cover. 
    1. Disconnect the connector of the battery power cable and insulate it with packaging tape.
    2. Using a torx socket wrench (T30), remove the 4 screws and inverter terminal cover.
    3. Using a torx socket wrench (T40), remove the 2 screws, circuit breaker sensor and connector cover.

      HINT:

      Slide the connector cover to disconnect the circuit breaker sensor connector.

    4. Using a voltmeter, measure the voltage between terminals of 3 phases (U-V, V-W, U-W) and each terminal and body ground to verify them to be approx. 0 V.
      Fig 1: Measuring Voltage Between Terminals
      G03430973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE CONVERTER & INVERTER ASSEMBLY 
    1. Remove the 6 bolts and 3 power cables for MG2.
      NOTE: Be careful to prevent foreign matter from entering the inside of connector cover. 
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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