How to clean the abs tone ring on a 2004 X-Type Jaguar

your car has a fault in the system that senses wheel speed and changes the way the car automatically responds to slippery road conditions. Often, successful troubleshooting of these faults will require the use of a special scanner; however, there are a couple of failure modes that a backyard mechanic can discover and correct.
If your ABS AND your brake light (on the instrument panel) are both on, it is likely your basic brake operation has a fault. In this case, please refer first to the tip on Brake Light Indicator.
First, let's understand how these systems work. The car/truck must have a sensor at each wheel to know for sure if any wheels are slipping. The usual method is to use a tone ring and sensor as shown below.
The signal from each of the 4 sensors is evaluated by the ABS system, which, if the brakes are applied, will essentially pump the brakes for you to prevent skidding. If the brakes are not applied but you have traction control, the traction control system will limit the differential behavior of the drive wheels to help you get traction. If you don't have traction control, the ABS system may alert you to wheel slippage with a "low trac" light. The logic and electronics associated with the reactive systems is different on different models, and that is why troubleshooting those parts of the system requires special scanners and training.
OK, so what can you do about getting those lights off without paying a specialist big bucks?
You can inspect the wheels for damaged tone rings, broken sensor wires or connectors, and misaligned sensors. The tone ring is usually visible at the end of the CV boot on a drive axle or behind the rotor on a non-drive wheel. For wheels with drum brakes, the tone ring may be inside the drum.
Spin the wheel looking closely at the tone ring for any missing or chipped teeth or a break in the ring. Check the sensor alignment to the tone ring and also the distance. If you can find the specs on the air gap, measure and adjust as necessary. If you can find specs for the sensor, check it with an ohmmeter for shorts and opens. There are a few more details on sensor diagnostics at the following page:http://www.brakeandfrontend.com/diagnosing-wheel-speed-sensors/.Check the connectors and trace the wires all the way to the ABS module to inspect for damage. Due to the variety of systems and conditions, I'm not going to try to cover repair procedures.

Most likely you damaged the ABS sensor or the tone ring. The tone ring is connected to the rotor and the ABS sensor reads the revolutions of the tire. Your regular brakes will still work OK. But the ABS might be out of service until you repair the issue.

Since you replaced the pick up units or sensors, check the tone rings on the axle shafts. The tone rings is what the sensors detect and are located at each wheel that has ABS. A tone ring looks like this:


This tone ring is on a Ford Ranger - which is pretty much the same as your Mointaineer. Notice the break in the tone ring. This will cause an ABS Fault indicator and will need to be replaced to extinguish the lamp. Check the brake fluid level and top off if needed.


Try another AutoZone or similiar to get a code and be non-specific about the light - just say a light came on on the dash and you don't know what it is about.

Good luck!

This all depends on if it is a wheel sensor. you will need to locate the sensor which is one on each wheel, remove the sensor and just clean off. reinstall sensor.
The best thing to do is have the computer scanned to see what code is stored, the code will tell you what the problem may be. For example if there is a code that reads left front speed sensor signal loss. then you would check that sensor and the connector to sensor, you would also look at abs tone ring. the tone ring is the ring that the sensor ride over.
I am not sure if the ring is external, you will need to look and see, cleaning the ring is a good idea also. good day.

there should be

Tell him to clean the sensor to put the light out. It is bound to be more than dirt. Once the ABS light is on, you usually have to empty your wallet to put it out. Maybe it's a sensor, but not from dirt. Maybe a wire broke, sometimes a tone ring splits. You can easily do a visual inspection of the sensors, tone rings, and wires; but if those are good, it's probably the control unit. I have pasted a picture of the tone ring on the axle. The rear tone rings are inside the drum and less susceptible to damage. Make sure the tone ring is square on the axle and not loose--no missing teeth, etc. Sensor should be square on the tone ring. Let me know if you have more questions.

Possible faults:

Different tire rotational speed wheel to wheel.

Broken wire loom to wheel sensor.

ABS Tone ring missing teeth, broken.

Bad ABS wheel sensor.

Dirty Tone ring...... brake dust and rotor dust.

There is always a reason for warning lamps to illuminate.

9 out of 10 times this problem arises when a wheel speed sensor goes bad or a corresponding tone ring breaks. the abs light may not come on, and there will be no code in the abs control module in this situation. but what happens is the tone ring goes around an axle or is part of a wheel hub. and it's got slots in it that "excite" the sensor. if there is a crack in a tone ring, it'll work properly most of the time but intermittently will make the abs module think that wheel is spinning at a different speed than the others, making the abs kick on.

If he "fixed" it with a new sensor because he had determined that there was no signal from that wheel, I'm assuming a wheel sensor, the problem may be wiring or a damaged tone ring at that wheel instead. You need to check continuity right back to the ABS module and carefully inspect the tone ring at the hub for missing teeth or a crack.