2008 Lexus LS 460FACTORY OEM SERVICE PROCEDURE

Front Speed Sensor: Installation

NOTE: While the battery is connected, even if the engine switch is off, the brake control system activates when the brake pedal is depressed or the door courtesy switch turns on. Therefore during servicing of the brake system components, do not operate the brake pedal and open/close the doors while the battery is connected.

HINT:

  • The front speed sensor is a component of the front axle hub sub-assembly. If the sensor malfunctions, replace the front axle hub sub-assembly.
  • The procedures listed below are for the RH side.
  • Other than areas where instructions are provided, use the same procedures for the LH side and RH side.
  1. INSTALL FRONT AXLE HUB SUB-ASSEMBLY 

    HINT:

    The front speed sensor is a component of the front axle hub sub-assembly. If the sensor malfunctions, replace the front axle hub sub-assembly.

    1. Install the front axle hub (see INSTALLATION ).
  2. CHECK FRONT AXLE HUB BEARING LOOSENESS  (See REMOVAL )
  3. CHECK FRONT AXLE HUB RUNOUT  (See REMOVAL )
  4. INSTALL FRONT DISC  (See INSTALLATION )
  5. CONNECT FRONT DISC BRAKE CALIPER ASSEMBLY  (See INSTALLATION )
  6. INSTALL SKID CONTROL SENSOR WIRE 
    1. for LH:

      Connect the connector (labeled A) to the front speed sensor.

      Fig 1: Identifying Front Speed Sensor Connector LH
      G04949756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. for RH:
      1. Connect the connector (labeled A) to the front speed sensor.
      2. Install the sensor clamp (labeled B) with the bolt (labeled C).

        Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      3. Connect the pad wear indicator connector (labeled D).
        Fig 2: Locating Front Speed Sensor Connector With Bolt And Clamp
        G04949757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Install the 2 sensor clamps (labeled E) with the 2 bolts (labeled F).

      Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      NOTE: Do not twist the sensor wire when installing the clamps.
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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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