2012 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE

Operation Check

WARNING: This page is about a different variant/trim than selected.
  1. AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK 
    1. Turn the power switch on (IG).
    2. Turn the light control switch to the AUTO position.
    3. Cover the automatic light control sensor.
    4. Check that the taillights and low beam headlights come on.
    5. Uncover the automatic light control sensor.
    6. Check that the low beam headlights and taillights go off.
  2. LIGHT AUTO TURN-OFF SYSTEM OPERATION CHECK 
    1. When only the taillights are on.
      1. Close the driver door.
      2. Turn the power switch on (IG).
      3. Turn the light control switch to the tail position.
      4. Turn the power switch off.
      5. Open the driver door.
      6. Check that the taillights go off immediately.
    2. When the low beam headlights are on.
      1. Close all of the doors.
      2. Turn the power switch on (IG).
      3. Turn the low beam headlights, high beam headlights or front fog lights on.
      4. Turn the power switch off.
      5. Open any door.
      6. Close all of the doors.
      7. Check that all of the lights go off after 30 seconds (delay function).

        HINT: 

        Before the lights go off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will go off immediately. But the lights will not go off immediately when the remote A/C switch on the key is pressed to lock all of the doors.

  3. DAYTIME RUNNING LIGHT SYSTEM OPERATION CHECK 
    1. Turn the light control switch to the tail position.
    2. Turn the power switch on (READY).
    3. Release the parking brake.
    4. Check that the daytime running lights come on.
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.