2008 Lexus RX 400h FWDFACTORY OEM SERVICE PROCEDURE

Front Speed Sensor: Inspection

  1. INSPECT FRONT SPEED SENSOR 
    1. Inspect the front speed sensor. If any of the following occurs, replace the front speed sensor with a new one;
      • The surface of the front speed sensor is cracked, dented, or chipped off.
      • The connector or wire harness is scratched, cracked, or damaged.
      • The front speed sensor has been dropped.
      Fig 1: Inspecting Front Speed Sensor
      G05202688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

      Resistance 

      LH 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Specified Condition
      2 (FL+) -1 (FL-) 1.4 to 1.8 kΩ

      RH 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Specified Condition
      2 (FR+) -1 (FR-) 1.4 to 1.8 kΩ
    3. Measure the resistance according to the value (s) in the table below.

      Resistance 

      LH 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Specified Condition
      1 (FL-) - Body ground 10 kΩ or higher
      2 (FL+) - Body ground 10 kΩ or higher

      RH 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Specified Condition
      1 (FR-) - Body ground 10 kΩ or higher
      2 (FR+) - Body ground 10 kΩ or higher
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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.