ABS light flashing when vehicle speed above 10mph than goes out at 15mph, (2002 Toyoya Sienna Van, 98674 miles on the odometer.

hello,the predominant reason why all the defect\'s that you explain,that are prevalent on your vehicle are, (1)the abs system controls more than the anti skidding element,as various signals are processed through the main computer and then the correct information is sent to the \'actuator\'s, ie; the rotational speed of the wheels to make the speedometer,and subsequently the odometer display correctly,your problems may only be a simple remedy as a brake light switch,or a fuse,or often a dirty wheel speed sensor.you do need to get a local auto technician to \'scan\' the vehicles various computers for any fault codes,and do additional live data checks to see if the various wheel speed sensors are in fact transmitting the signals to the \'modulator/abs computer,check all fusible links,also asess the conditions of the multi plugs and wiring harnesses ,as well as the main relay\'s,as \'oxidization\' builds up rapidly,especially on older vehicles,impeding the flow of signals/current/voltage.hope that helps, regards.

replace the speed sensor , then the lights goes off

In this vehicle does not have vehicle speed sensor but vss was convert from ABS ecu that detect signal from wheel speed sensor so you have to check that ABS light comes on or not and check for code fix it first and you will get the result

You could have a faulty speedometer/odometer combination meter causing a false Vehicle Speed Sensor error.
My 1998 Sienna had the following symptoms:
- Speedometer and odometer failed intermittently
- The check engine light would come on and I would get a p0500 code in the OBDII.
- The cruise control would stop working at the same time the speedometer failed.
There is a speed sensor in each one of the tires and they feed the speed information to the ABS ECU. From the ABS ECU the speed signal goes to the speedometer/odometer combination meter, and from there it goes to the Engine Control Module and to the Cruise Control ECU. I could see a signal coming into the speedometer/odometer, but no signal going out. Replacing the speedometer/odometer combination meter fixed the problem.

Sounds like two different problems - the brake light switch and the speed sensor in the transmission.
Does the speedometer work ?

Whenever this warning or any other stays on in the dash it is indicating that the systems control module has detected a fault, it then disables the system as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Sounds like either a bad Vehicle Speed Sensor (VSS) or a malfunctioning Instrument Cluster Module.

Look up above your brake pedal and you should see a switch that is connected to it. This switch controls your brakes and in some vehicles, is tied in to the safety system. Change this and see if your van goes into gear ($10 part)

You have to "Teach" the tire sensors to the correct pressure. The 02 Sienna does not measure the actual PSI tire pressures, it measures the RPM of the tires. with the tires set to specs, the rotation RPM is "x". If a tire goes low, the rotation RPM would bt "y", and that will light the light.

The proceedure: Set the tires to specs with a known good pressure gauge. The ones that you can put in your pocket, that looks like a pen, are alway sincorrect. Get one with a needle reading. Set the tires correctly. Now, press the reset button, hold it until the light blinks 3 times. Drop it into gear, and DRIVE IT. 8-12 miles, above 19 MPH, and UNDER 61 MPH. This will re-teach the ABS computer the correct values.