Can You Test If An ABS Sensor Is Working or Not?

[JoeC]

I have a front wheel ABS sensor for a twin spark 1150GS - is there a way of testing it to see if it works without having to connect it up? I have a single spark bike so cannot plug it in to test.

Thanks
Joe

 

[Rugged Path]

Would have thought they are the same as it is not part of the twin spark upgrade (if it was such a thing).

 

[Steptoe]

Would have thought they are the same as it is not part of the twin spark upgrade (if it was such a thing).

Different plug/connector.

 

[Ian Whinnett]

Not sure if its the same for smaller stuff. Large vehicle ABS sensors usually have a resistance of about 1.1 Ohms. Anything much away from that and they get launched. Measure the resistance of both sensors and see if you can check another one from somewhere. If the sensor is similar would it be possible to connect the later type with 2 bits of wire for testing purposes?

I'm not familiar with how they look.

Hope that helps.

 

[Hay Ewe]

I think I read about this on ADV and some person used an oscilisope thing and looked for a step change as the disk rotated in front of the sensor.

 

[Smug]

Connect the two terminals on the sensor to an oscilloscope and spin the wheel. If the sensor is working you should get a regular plus to minus oscillating voltage signal.

 

[GS Addict]

Testing

The two generation sensors are not interchangeable mechanically or electrically.

To test:

ABS 2 sensor:
Wound coil
Resistance should read approx 130 ohms.
Scope attached directly across leads you see should a sine wave on a scope in the 4-7v range with a varying frequency depending on wheel speed. approx 0-120hz spun by hand.

ABS 3 sensor (servo):
Electronic (suspect hall sensor)
Resistance method won't work.
12vdc+ thru a 1k ohm resistor to pin 2 of the sensor connector. Pin 1 goes to 12vdc-.
Attach scope leads across the resistor. you see should a square wave on a scope in the 4-7v range with a varying frequency depending on wheel speed. approx 0-120hz spun by hand

On both types you can also monitor frequency on a good quality DVM set to Low volts AC HZ if you don't have a scope.

 

[JoeC]

Thanks for all your replies.

 

[Steptoe]

The two generation sensors are not interchangeable mechanically or electrically.

To test:

ABS 2 sensor:
Wound coil
Resistance should read approx 130 ohms.
Scope attached directly across leads you see should a sine wave on a scope in the 4-7v range with a varying frequency depending on wheel speed. approx 0-120hz spun by hand.

ABS 3 sensor (servo):
Electronic (suspect hall sensor)
Resistance method won't work.
12vdc+ thru a 1k ohm resistor to pin 2 of the sensor connector. Pin 1 goes to 12vdc-.
Attach scope leads across the resistor. you see should a square wave on a scope in the 4-7v range with a varying frequency depending on wheel speed. approx 0-120hz spun by hand

On both types you can also monitor frequency on a good quality DVM set to Low volts AC HZ if you don't have a scope.

Useful info if you haven't the use of a GS911