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Home >> Lexus >> 1990 >> LS 400 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Testing >> Code 21 Speed Sensor Circuit >> Input Signal Check

Input Signal Check

  1. Perform INPUT SIGNAL CHECK under TROUBLE SHOOTING in this article. Check cruise control indicator light while driving vehicle above and below 25 MPH (40 KM/H).
  2. At speeds below 25 MPH (40 KM/H), indicator light should stay on. At speeds above 25 MPH (40 KM/H), indicator light should blink. If light operates as indicated, go to next inspection item shown on matrix chart in Figure or Figure . If light does not operate as indicated, go to SPEEDOMETER/VEHICLE SPEED (4-PULSE) SIGNAL.