I took my 2002 S-type to to Jag dealer about a week ago. I had ABS and traction control light on. They said it was a wheel sensor and needed to be ordered.

I went back today ( 1+ hour drive each way each trip). They installed the sensor and it did not cure the problem. They put the old sensor back on and said that it needed a module for $1400!

The places that I have found on line that do module repairs say that mine cannot be repaired.

Anyone know of some place to obtain an ABS module specifically for a 2002 S type for less than this??

Thanks!

 

Bob, Curious about this. Didn't dealer read codes? that should've made a clear distinction between module and sensor. Sounds like they are guessing and replacing parts using your $$! Do some searches here, pretty common problem amongst XJ's and XK's for the pump-motor traces to crack. (Code is C1095 indicating a bad pump on X300's, don't know about S-types) but this is repairable in the comfort of your own home with about $20 worth of solder gear. Again, not sure if S-types are known for this failure, I have an 03 and an 05 and neither have exhibited it. But if so, I can understand module-places telling you it is irrepairable because you do have to cut the module housing open, and must exercise due care in doing so, then silicone it back together when done.

 

Not common, but coul be that. Teves ones do seem to be prone to that fault.

Surely scrapyards (wreckers) should have the modules, or ebay...

+1 on the ABS module codes ought to be read (ordinary OBD tool won't do it)

 

On the first trip to the dealer, they did run codes. The code was C1155 which is left front wheel sensor. They ordered a new sensor and installed it today and then got the same code. I guess they think that since the sensor didn't solve the problem, it must be the controller.

 

Could be wiring/connector. They sound useless. DIY or find someone who has a brain...

 

There are separate codes for the controller and the wheel sensors. I think your problem is between the two as JagV8 said.

A little disappointed that the dealer was not able to trouble shoot it better? There is a large list of ABS system codes. They can also activate or self-test the controller which should have eliminated it as the problem?
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If you find out your ABS module is done - match up the part number and look up on Ebay. I had a C1095 code on my 00 S Type and matched up my module - disconnected the module and replaced - problem solved!

 

Ok, I looked at the wiring schematics in JTIS. It appears that both the power to the sensor and the input from the sensor are straight runs directly to the large connector at the module. I pulled the connector and measured the resistance across the two wires in the plug using my multimeter. It indicated that basically it is an open circuit. Unfortunately, I get the same result for all four wheel sensors. I am assuming that the resistance should be zero or at least negligible for a good sensor circuit. I believe that I read somewhere on the forum that the resistance someone else got was about 2 - 5 ohms?

I realize that the pin holes are small and my probes won't touch the connectors. I inserted small wires into the connectors to make contact.

Any ideas on what I am missing here?

Thanks!

 

The sensors produce a varying voltage. Spin the wheel...

 

Well, I jacked up the car and spun the wheel, I got no voltage reading. Then, as a test, I jacked up the other side and spun that wheel as well, no voltage there either.

I can only spin the wheel about 1/2 revolution at a time.

 

It's created as the reluctor (aka tone) ring passes the sensor as a rough square wave, small enough for the computer to detect.

 

Well, it seems like I'm back to square one. If installing a new sensor did not resolve the problem, and there was no code indicating a controller problem then, as suggested by JagV8 and tbird6 the problem could be in between.

The question I have is can I test for continunity using my multimeter?

I tried to measure the resistance between the two left front sensor wires at the main controller connector and got infinite ohms. That would indicate a problem. However, I got the same result when testing the wires for the other front sensor for which no code was given.

Is this an appropriate was to test these circuits?

Thanks!

 

Check fuses and relay to the ABS/DSC system...

 

Disconnect at both ends of sensor wiring and test continuity of each wire. Check impedance of sensor at the sensor. Reconnect sensor. Check impedance from far end. If all OK, reconnect to module. Repeat for all 4 sensors.

 

I am finding it hard to believe that your ABS unit is one that could not be repaired. I used and recommended ASI several times with positive results. Give them a call and see what they have to say.

Link Welcome To Auto ECU Inc.

I have an ABS test sheet for a 99xk8 and it will not work for your car but it might give you direction for your car if you want it.

 

Guys

Thanks for giving me some ideas to explore. It will be a little while before I persue this further. It has become very cold here in Pennsylvania and my garage is not heated.

I will update as I go along.