70 LS1

Can someone check their service manual and see what the resistance for the wheel speed sensors is supposed to be?

thanks

BlackZ06

My 2001 manual says 850-1350 ohms

Steve

70 LS1

Thanks,

is that for both front and rear?

BlackZ06

Correct, the sensors are the same on all four wheels - again this is based on the 2001 manual.

Steve

70 LS1

Thanks Steve.

Is there any other info in the book about them? frequency? single or multiple pole magnetic pickup? # of pulses per revolution? Anything else would be helpful.

BlackZ06

Unfortunately the manual doesn't give a lot of detail ...

"As the wheel spins, the wheel speed sensor produces an AC signal. The EBCM uses the frequency of the AC signal to calculate the wheel speed."

I guess they figure this is all Mr. Goodwrench needs to know, either the EBCM is getting a valid signal, or not. If not, either the wiring or the sensor is faulty.

Only info shown is that in testing for a bad sensor, a sensor is tested in two ways:

1) Wheel stationary - measure resistance ( Allowed value range listed is 850 - 1350 ohms)

2) Wheel rotating - AC voltage should be 100 mV

If the sensor doesn't pass those two tests, then the fix is to replace it. If the testing shows a valid signal at the pin outs for the EBCM, then the fix is to replace the EBCM. Makes it simple for the mechanic, but not much help for someone trying to reverse engineer what the EBCM and sensors are up to.

Good luck,

Steve :cheers:

70 LS1

Thanks Steve,
that actually helps a lot.