LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1994 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> VSS No. 1 Circuit (Speedometer Operates)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

VSS No. 1 Circuit (Speedometer Operates)

  1. If odometer does not operate, repair as necessary. See INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT section. If odometer operates, remove instrument cluster, but leave electrical connectors attached. Raise and support vehicle with rear wheels off of ground. Turn ignition on. Connect voltmeter between chassis ground and terminal No. 14 (Pink wire) of instrument cluster center connector. Rotate drive shaft.
  2. If voltage does not alternate between zero and 5 or more volts for each revolution of drive shaft, replace printed circuit. If voltage alternates between zero and 5 or more volts, check for faulty wire (Pink Wire) between instrument cluster and ECM. See COMPONENT LOCATIONS  under INTRODUCTION. If wire is okay, replace ECM.
scientia non olet · About LEMON Manuals