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Front Speed Sensor: Inspection

  1. INSPECT FRONT SPEED SENSOR (for BOSCH Made) 
    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.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      LH 

      TESTER CONNECTION SPECIFIED CONDITION CHART LH

      Tester Connection Specified Condition
      1 (FL+) - 2 (FL-) 1.4 to 1.8 kΩ at 20°C (68°F)
      1 (FL+) - Body ground 10 kΩ or higher
      2 (FL-) - Body ground 10 kΩ or higher

      RH 

      TESTER CONNECTION SPECIFIED CONDITION CHART RH

      Tester Connection Specified Condition
      1 (FR+) - 2 (FR-) 1.4 to 1.8 kΩ at 20°C (68°F)
      1 (FR+) - Body ground 10 kΩ or higher
      2 (FR-) - Body ground 10 kΩ or higher

      If the value is not as specified, replace the front speed sensor.

      Fig 1: Measuring Front Speed Sensor Resistance
      G04978137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FRONT SPEED SENSOR (for ADVICS Made) 
    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.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      RH 

      TESTER CONNECTION SPECIFIED CONDITION CHART RH

      Tester Connection Condition Specified Condition
      1 (FR+) - 2 (FR-) Always 1.4 to 1.8 kΩ at 20°C (68°F)
      1 (FR+) - Body ground Always 10 kΩ or higher
      2 (FR-) - Body ground Always 10 kΩ or higher

      LH 

      TESTER CONNECTION SPECIFIED CONDITION CHART LH

      Tester Connection Condition Specified Condition
      1 (FL+) - 2 (FL-) Always 1.4 to 1.8 kΩ at 20°C (68°F)
      1 (FL+) - Body ground Always 10 kΩ or higher
      2 (FL-) - Body ground Always 10 kΩ or higher

      If the value is not as specified, replace the front speed sensor.

      Fig 2: Measuring Front Speed Sensor Resistance
      G04978023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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