I read one place that the ohms were supposed to be between 1000 - 2500ohm and then in another place it said 1000ohm for later cars but didn't state what was later.
I have a good Fluke meter with a new battery..
I just received a pair and one was 765ohm and the other is 771ohm.

Can someone clear this up... thanks for looking.

 

They're not sensed by ohms but by waveform.

 

[QUOTE=JagV8;2341668]They're not sensed by ohms but by waveform.[/QUOTE

Thank you

One google answer
"How many ohms should a wheel speed sensor have?
The typical reading for a passive wheel speed sensor is between 1,000 and 2,500 ohms. This is a normal range for all passive sensors. The specification for active sensors is between 1,000 and 2,500 ohms."

This says anywhere between 450-2200 ohm so I'm going to install one and see what happens..
https://www.brakeandfrontend.com/dia...speed-sensors/

 

Google is not your friend, especially here. If you want an ohm specification for a particular sensor, you'd want the Jaguar service manual, not a vague description that covers a broad range of manufacturers and applications.

With that said, a resistance reading across such a sensor is mostly gee-whiz info. The sensor is just a coil of fine wire inside a sealed housing. I deal with similar sensors all the time at work. Some work by generating an electrical pulse as a magnetic target passes by, kinda like a transformer. Others work by injecting an AC signal and sorta watching its echo, which varies depending on the proximity of an adjacent ferrous target. Either way, it doesn't really matter how these wheel speed sensors operate. It's all electronic magic, interpreted by a computer module. All we need to know is if the resistance reading is out of spec, then yes that is a bad sensor. But more often, the resistance reading is fine yet the sensor still doesn't work properly. I have fixed many a problem by replacing sensors that tested good for resistance.

On a practical level, if you absolutely gotta know what the resistance should be, just use a (insert name of ethnic group here) blueprint. Measure the sensor on the opposite side, one that is known to be operating correctly. Or if the part is easy enough to change, just plug it in and see what happens.

 

Roger that, and thanks again for all your time there..

 

I replaced the right rear speed sensor and all the codes were gone when I started the car, I didn't even have to dump them, even the Trans code.

Then I drove it and the Trans is good too.. I have my car back with $48 part

Thanks everyone

 

Fantastic!!

Thanks for following up.

 

Thank you, Karl, Joyces Jag all "Fantastic!!"

 

Great job from start to finish. This repair will definitely help someone in the future