RX300 1999

Throttle Position Sensor

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Operation



Specific to:

Lexus RX300 1999-2003

Lexus RX330 2004-2006

The Throttle Position Sensor (TPS) is a Linear Potentiometer that monitors the throttle position. The TPS operates within a 5 volt DC reference range, and provides a linear input signal to the Powertrain Control Module (PCM). The PCM uses data from the TPS to calculate Air-Fuel mixture, ignition timing, fuel injector pulse width, and transmission/transaxle gear position.

Removal & Installation



Specific to:

Lexus RX300 1999-2003

At this time the manufacturer does not provide removal and installation procedures for this component.

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Fig. Throttle body and related components (2 of 2)-RX300



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Fig. Throttle body and related components (1 of 2)-RX300

Testing



Specific to:

Lexus RX300 1999-2003

  1. Apply vacuum to the throttle opener.
  2.  
  3. Disconnect the sensor connector.
  4.  
  5. Insert a feeler gauge between the throttle stop screw and stop lever.
  6.  
  7. Using an ohmmeter, measure the resistance between each terminal.
  8.  
  9. If the resistance is not as specified, replace the sensor.
  10.  
  11. Reconnect the sensor connector.

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    Fig. TPS testing



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    Fig. TPS resistance table

  12.  

 
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