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My D4d 2015 Toyota HiLux speedo suddenly show 25 km/h over my actual speed. If you shut it down the needle stops at 25 km/h. What has gone wrong?
It sounds like the needle has physically moved on its shaft to exhibit this problem. The question is how. Did you hit a huge pothole or bump off-road? Has any part of the dashboard been adjusted or pulled apart for another reason? Has the vehicle been operated in really dusty conditions (sufficient to have jammed up the smooth movement of the speedo needle)?
Unlike older vehicles, the modern HiLux doesn’t use a simple mechanical cable to power the speedo. Instead, it uses a vehicle speed sensor as part of the transmission to inform the body computer of the vehicle’s speed which then transfers an electrical signal to the speedo in the dashboard. If anything goes wrong with that chain of electronic command, then the speedo can be affected.
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