FIRST ISSUE THREAD POSTED! LOL

I have an 03 S Type R that when given to me had a bad driver side hub bearing. We went to autozone here in town and got a moog hub assembly (part # 513371). We installed it and drove the car but the ABS light never went back off. Still says front left hub on my reader. I checked the voltage coming to the hub ABS and have 11.6 volts. My wife took the new hub and just plugged it in on the passenger side and it through that code. So we thought maybe a bad sensor. Took it back to auto zone for a new one but same issue. I compared ohms on the good sensor (passenger side) to the new sensor and they are way different i think( crappy meter). The good hub has roughly 17.3 megahoms and the moog has .4 megaohms. We also went to oreillys and looked at there hubs but as far as I can tell they are the same as autozone.auto zone. We have an Oreilys, Autozone and Napa here in town. Does anyone have any input on the correct hub needed for my car?

 

Turn the hub slightly. You may be on a peg or valley which will through off the reading. Im not sure what they should measure but if I have a chance I will measure mine today and post the results

 

They're not sensed via ohms so checking that way is of dubious value.

 

Rgr. Thanks. Jaguar gave me a part number of C2D38987. I'm trying to cross reference it with other brands with no luck so far. I wasn't for sure on the ohms to test these but thought it would give me a good comparison.

 

Could you possibly switch the ABS sensor/wire from the bad hub to the replacement hub.

 

The Moog Hub that i tried was either sealed or didn't have the same spring clip that holds the sensor into the hub assembly. I did find a C2D38987 on Ebay new in the box(hopefully) that I am going to try out. I should have it middle of next week. I will keep this updated.

 

As JagV8 has mentioned, a resistance reading isn't going to give you a conclusive answer to confirm a particular part is good. However, the resistance values should be similar, so you should be able to confirm if one is bad. The sensor itself is just a coil of fine wire encapsulated in some type of housing. We deal with similar sensors all the time in my line of work (aviation). For a sensor fault, one of the first steps in the troubleshooting manual is to compare resistance to specifications. If out of specs, change the sensor because it is bad. But if the resistance reading is good, the next steps send us on to other checks. But if those all pass, the manual loops back to change the sensor anyway, as it may still be bad. They are often intermittent, caused by thermal expansion and/or vibration, but the resistance can check good at that particular moment. What I'm trying to get across is that a resistance reading isn't everything, but it can be a big clue.

In our situation, Jaguar hasn't given us any resistance specs that I know of. So we have to guess by comparing with other sensors. How much variance is okay? My best guess is about 10 percent or so, but I really don't know. Your situation is actually good for troubleshooting, as you don't seem to have an intermittent fault. You've got a hard fault staring you in the face. You definitely seem to be on the right path, swapping the hub/sensor assembly, and trying it on the other side for comparison. I can't imagine an aftermarket part would be so far off compared to what was there, so it seems you got a bad one out of the box.

You had mentioned having a crappy meter, but even so, two comparable parts should give similar readings. Something ain't right, but I doubt it's the meter.



Sorry, I can't tell you to try brand ABC or whatever. However, I do know to avoid the discount part chains as much as possible, typically selling low quality stuff from who knows where. Personally, I am very partial to NAPA, but even then you have to be careful. They sometimes offer lower cost options to compete with the discount chains. Go with their premium line. These parts cost more, but there is a reason.

 

What happens when you plug the old one in ?
the sensor is separate from the hub, so use the old one?

 

Exactly!

 

The sensor comes pre-installed on the new hubs for these. The ones we picked up from autozone and oreillys did not have the same sensor clip as the original one. I found one on Ebay should be here Thursday. I will update this thread

 

I have just looked up the front wheel ABS speed sensor for a 03 model year S-Type R (VIN M62938- M94765) and the official Jaguar parts catalogue lists these as part number C2C34640 at £146.20.

See this link.
https://parts.jaguarlandroverclassic.../brand/jaguar/

Looking at the workshop manual in regard to a faulty sensor the instructions are to test the wires at the control module plug to the sensor for a short to ground or an open circuit not to test at the wheel sensor.

If these are ok and there is no obvious mechanical issue, then you need to replace the sensor.

The sensor was changed on vin M45254 (before the start of the 02 model year cars) and again on VIN N13089 (start of the 05 model year cars) so the sensors are not all the same for every model year and one sensor will not fit all cars. I think this may be a change in the way they are mounted rather than the actual electrical properties of the sensors. But i am not sure.

 

Well Ebay saved the day on this one! I ended up calling Jaguar to get the part number for a new hub bearing because supposedly there was a lot of revisions. They gave me part # C2D38987 for a cost of $619. I found one new in the box on ebay for 75 bucks which i thought was worth the gamble. Well it was and it was still factory sealed in the Jaguar box when it came to my house! I checked the ohms on this one just for sh*ts and giggles and the ohms matched that of the passenger side hub. once installed I drove it maybe 15 feet and the ABS code reset. So the hubs i received from Autozone and Oreilys had to have something different about them even though they were listed for my vehicle. I really appreciate all the help on here!