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Home >> Lexus >> 1995 >> SC 400 >> Repair and Diagnosis >> Body & Frame >> Power Mirrors - With & W/O Memory System >> Component Tests >> Mirror Position Sensor >> W/ Memory System Only

W/ Memory System Only

  1. Connect a series of 3, 1.5 volt dry cell batteries.
  2. Connect the positive (+) lead from the dry cell batteries to terminal 5 and the negative (-) lead to terminal 9. See Fig 1.
  3. Connect the positive (+) lead from voltmeter to terminal 6 and the negative (-) lead to terminal 9. See Fig 2.
    Fig 1: Inspecting Mirror Position Sensor Up & Down (1 Of 2)
    G00166303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Inspecting Mirror Position Sensor Up & Down (2 Of 2)
    G00166304Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Apply battery positive voltage to terminals 2 and 3, then check that the voltage gradually changes while the mirror moves between the uppermost position and lowermost position. In lowermost position, voltage will be 2.8-5.0 volts. In uppermost position, voltage will be 0-.09 volt. If voltage change is not as specified, replace motor assembly.
  5. Disconnect the 4 leads of the battery and voltmeter. Connect the positive (+) lead from the voltmeter to terminal 4 and negative (-) lead to terminal 9. See Fig 3.
  6. Apply battery positive voltage to terminals 1 and 2. See Fig 4. Inspect that the voltage gradually changes while the mirror moves between the left most position and the right most position. See MIRROR POSITION SENSOR VOLTAGE . If voltage is not as specified, replace the motor assembly.
    Fig 3: Inspecting Mirror Position Sensor Left & Right (1 Of 2)
    G00166305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Inspecting Mirror Position Sensor Left & Right (2 Of 2)
    G00166306Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
MIRROR POSITION SENSOR VOLTAGE

Mirror Position Voltage - Left Rightmost
Leftmost 2.8-5.0 0-0.09
Rightmost 0-0.09 2.8-5.0