Speed emoter isn't working What's the problem

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TOYOTA COROLLA VERSO 2003 2004 2005 2006 2007 2008 FACTORY SERVICE REPAIR...

The speed sensor would be a likely suspect.
It takes the place of the speedo cable going from the transmission to the speedometer.

Only you know when & how often you choose to change your oil

Wouldn't a trip to a repair shop sort of get a start on things?

We guess at times but not on your question & no info
of technical nature to go by

No idea what has ever been done up to now or with
the current porblem

The ABS like the rest of the truck is a system

You need to get the codes & diagnose from there,
the same as any time you get a malfunction lamp lite

If your asking what is common & fairly easy to fix,a
wheel speed sensor,but you don't throw parts at a code,
that isn't why come up

Try either capacitor or motor brushes. Your voltage isn't quite high enough or it's not getting through

Check to see if there is any back lighting.

Pull the speed sensor from the transmission case and if there are any metal filings on it clean them off and replace it. If there are not filings you may need to replace the sensor. The speedometer head itself or wiring conneftors could be the porblem as well.

Check the speed control board's voltage from the fan. If you are below 20 volts, 1- oil the cooling fan bushings to see if that helps. Otherwise adding in a discrete 24 volt 1 ro 1.5 Amp "control" transformer and a 2 ohm 50 Watt resistor in place of the fan's 24 volt tap (it rarely gets to 24 volts) should bring your speed up.

This does assume the board is fully functional.

probrably the button its self is not staying on go rockauto.com u can see the whaole switch and price

more than likely....blower motor resistor, normally located next to blower motor passenger
side under dash 2 screws & a plug