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Home >> Lexus >> 1997 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Vehicle Speed Sensor (VSS) No. 1
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Vehicle Speed Sensor (VSS) No. 1

  1. If speedometer operates, VSS No. 1 is okay. If speedometer does not operate, disconnect VSS No. 1 connector. Remove VSS No. 1 from transaxle/transmission. Connect battery positive lead to terminal No. 1 and negative lead to terminal No. 2. See Fig 1.
  2. While rotating gear, measure voltage between terminals No. 2 (negative lead) and No. 3 (positive lead). Replace VSS No. 1 if voltage does not alternate between zero and 12 volts, 4 times per revolution.
Fig 1: Identifying Terminals Of Vehicle Speed Sensor (VSS) No. 1
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