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    SC400 Gross Speedo Error

    Cluster removal vs. cluster.... This is my 1st Lexus, and although I was ready to take on an interior passenger door panel removing the instrument cluster (when everything except the speedo is working just fine) might be more of a bite than I'm confident I can chew...:nervous: Unless...
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    SC400 Gross Speedo Error

    Shift points seem very normal. Odo readings and gas mileage seem right. 1993's are OBD1, there are no codes being thrown and CEL cycles on & off at startup as it is supposed to. No way it is kph vs. mph (60 mph being 100 kph) as it is reading LOW by 10-15 mph. Still stumped!
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    SC400 Gross Speedo Error

    To my knowledge... ... my 1993 SC400 is totally stock. Not the original owner but have absolutely no reason to think it is anything but.. Hooked up a Smartphone/ Speedo-GPS app and found that the normal varience between the indicated speed and actual (via the GPS) was about 10 mph LOW @ an...
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    SC400 Gross Speedo Error

    1993 SC400, 95K miles, starts, idles, shifts & drives great (IMHO). Standard sized 225/55-16 tires, no CEL's (but the check engine light does come on and then turns off at start, as it is supposed to)... Speedo consistantly 10-15 mph lower than actual speed! Dash is bright, needles all move...


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