Section 207 (Power Mirror Control System - Diagnosis): Inspection

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT MIRROR POSITION SENSOR
Check the voltage.
1. Apply voltage to the terminals with a battery and a dry cell battery, as shown in the figure Fig 1 below.
2. Measure the voltage while the mirror moves between the fully turned downward position and fully turned upward positions.
  
  Fig 1: Inspecting Mirror Position Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Measurement Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the mirror assy.
3. Measure the voltage while the mirror moves between the fully turned to the left position and fully turned to the right position
  
  Fig 3: Inspecting Mirror Position Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Terminals Voltage Reference Chart (Right Side Mirror)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the mirror assy.
  
  Fig 5: Terminals Voltage Reference Chart (Left Side Mirror)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the mirror assy.