[Shotimes] Testing ABS

[Peter Chase]

No, the ABS light never came on (at least not until I pulled the
fuse).  I guess if a sensor had no signal at low speeds, but was
otherwise OK, it wouldn't trip any faults, huh?  I guess I'll check
for gunk around the other sensors, too and then see what happens.

Thanks,
   Pete

On 7/22/05, Paul Nimz <pnimz@v8sho.com> wrote:
> The ABS sensors are magnetic proximity sensors.  They sensors are meant to
> differentiate the bumps and valleys of the ABS ring to send out a pulsed AC
> signal.  You should be able to tap into the wire and when spinning the wheel
> see the voltage come on and go off.  Don't know if it is 5v or 12V DC input.
> The signal will be a pulsed DC output, which is a positive square wave AC
> signal.
> 
> If you disconnect the sensor I would assume you would get a code.  You can
> trigger the ABS to put out a pulsed signal via the dash warning light the same
> way you can with the check engine light using a paper clip.  The ABS connector
> is on the left hand strut tower.   But if there is a fault you should already
> be getting a code via the warning light when you start the car and it does its
> self test.  Does the ABS light come on when you start the car?