2012 Toyota Prius Plug-inFACTORY OEM SERVICE PROCEDURE

Front Speed Sensor: Removal: Removal

NOTE:

While the auxiliary battery is connected, even if the power switch is off, the brake control system activates when the brake pedal is depressed or any door courtesy switch is turned on. Therefore, when servicing the brake system components, do not depress the brake pedal or open/close the doors while the auxiliary battery is connected.

HINT: 

  • Use the same procedure for the LH side and RH side.
  • The following procedure is for the LH side.
  • If the sensor rotor needs to be replaced, replace it together with the front axle hub and bearing assembly.
  1. DISCONNECT CABLE FROM AUXILIARY BATTERY NEGATIVE TERMINAL 

    Refer to REMOVAL

  2. REMOVE FRONT FENDER LINER 

    HINT: 

    Use the same procedure for the LH side and RH side. Refer to REMOVAL .

  3. REMOVE FRONT SPEED SENSOR 
    1. Remove the 2 clamps and disconnect the front speed sensor connector.
      Fig 1: Identifying Speed Sensor Wire, Clamps & Connector
      GTY337169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and No. 2 sensor clamp from the body.
      Fig 2: Identifying No. 2 Sensor Clamp And Fastener
      GTY225023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 Sensor Clamp
    3. Remove the bolt, No. 1 sensor clamp and front brake flexible hose together from the shock absorber assembly.
      Fig 3: Identifying Shock Absorber Assembly, No. 1 Sensor Clamp Front Brake Flexible Hose & Bolt
      GTY227458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 1 Sensor Clamp
      *2 Front Brake Flexible Hose
    4. Remove the clamp from the shock absorber assembly.
    5. Remove the bolt and front speed sensor.
      Fig 4: Identifying Speed Sensor & Bolt
      GTY337167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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