2012 Toyota Prius Plug-inFACTORY OEM SERVICE PROCEDURE

Operation Check

WARNING: This page is about a different variant/trim than selected.
  1. INPUT SIGNAL CHECK 
    Fig 1: View Of Cruise Control Main Switch
    GTY220409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the Techstream to the DLC3.
    2. Check the cruise control main switch using the Data List function of the Techstream (ON-OFF, - SET and + RES).
      TEXT IN ILLUSTRATION

      *1 ON/OFF
      *2 - SET
      *3 + RES
  2. INSPECT MODE SWITCH 
    Fig 2: Inspecting Mode Switch
    GTY227589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the power switch on (IG).
      TEXT IN ILLUSTRATION

      *1 ON/OFF
      *2 MODE
    2. Turn the cruise control main switch on. Then push the main switch to MODE for 1 second or more to change to the constant speed control mode. Check that "RADAR READY" goes off on the display.
    3. Check that the cruise main indicator light (vehicle-to-vehicle distance control mode) goes off and the cruise main indicator light (constant speed control mode) illuminates.
      Fig 3: Identifying Cruise Main Indicator Lights & Multi-Information Display
      GTY230576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Multi-information Display
      *2 Cruise Main Indicator Light
      (Vehicle-to-vehicle distance control mode)
      *3 Cruise Main Indicator Light
      (Constant speed control mode)
      NOTE:

      Do not push any other switches before pushing the main switch to MODE. If another switch is pushed, turn the main switch off and repeat the procedure above.

      HINT: 

      If a malfunction is detected, turn the power switch off and repeat the procedure above.

  3. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Turn the power switch on (IG).
    2. Turn the cruise control main switch (ON-OFF button) on.
    3. Turn on the vehicle-to-vehicle distance control switch of the steering pad switch.
    4. Check that the indication of the vehicle-to-vehicle distance, which is shown on the multi-information display on the combination meter, changes from long to middle to short in that order.
      Fig 4: Inspecting Steering Pad Switch Assembly
      GTY219636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Steering Wheel *2 Steering Pad Switch
      *3 Distance Control Switch *4 Multi-information Display
      *5 Long *6 Middle
      *7 Short *8 Combination Meter

      HINT: 

      The indication is automatically set to long each time the engine is started.

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.