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Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.


How to Reset the Rover 800 ABS Fault Code Memory (after fixing the fault).

Car: 1999 Rover 800 825 V6 Coupe



The Rover 800 is fitted with an ABS Self Diagnosis Test. This can easily be used to diagnose any problems that have caused the ABS Warning Light on the dashboard to stay illuminated. The results will most often show a faulty ABS wheel sensor is the problem.

If you do not have the list of the fault codes handy, then knowing that the ABS Wheel Sensors are normally what go faulty, you can also check them manually using a multimeter.

After identifying the cause to a specific ABS wheel sensor you will need to find a replacement. Wheel sensors are an expensive item when it comes to buying new, and so more often than not, a used sensor from a scrap yard vehicle will become a much more viable option.

HOT TIP: Take a multimeter with you to the scrapyards to test any sensors prior to removing them. Saves removing and buying any duff ones!

TOP TIP: When purchasing/using a sensor from a donor vehicle, if you can't find a sensor for the correct side of the car, you can always use one from the opposite side by reusing the brackets off your own vehicle.

If you don't have a multi-meter, another good tip is to quickly connect the replacement sensor to the connector under the bonnet prior to fitting it properly. The sensor does not need to be near the wheel to test it. Turn the ignition ON & the ABS Warning Light should light up initially and then be extinguished. This will prevent you wasting time fitting a faulty sensor.

Swapping a faulty sensor for a replacement one is quite straightforward, (see photos below).



Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
Loosen the Wheel Nuts, then Jack up the Car.....Hey!! you know this bit...so Lets just Skip to the Next.... (just don't forget to use axle stands!)

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
This is the NSF (Nearside Front / Passenger Side) ABS Wheel Sensor, which we have already Diagnosed as the Faulty ABS Wheel Sensor.

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
The Sensor is Attached behind the Wheel, and is used to Detect the Wheel Motion via the Readings Created by its Location in Relation to the Teeth on the Reluctor Ring.

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
To Remove a Rover 800 Front Passenger Side ABS Sensor, First Locate this Connector Under the Bonnet.

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
Remove the Connector from its Bracket, then Undo the two Sides of the Connector using two Narrow Screwdrivers or Similar, to Release the Clips on Either Side!

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
Next Remove the Bolts Under the Wheel Arch which hold the Cable in Place.
Note: You only have to Undo Two Bolts for Removal of the Long Bracket, Not Three! A Common Mistake is to Try and Loosen the Third & Most Difficult Bolt from the Support Arm, which Actually does not Need to be Removed!

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
Once all the Necessary Bolts have been Removed, You can Pull the Disconnected Connector through from the Bonnet Area.

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
If you Connect the Replacement Lead onto the Connector under the Bonnet, then you can Test it is Working Prior to Fitting it.

(If you have Obtained a Lead off the Opposite Side of another Vehicle, you will need to Swap the Brackets Over after you know it works!)

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
With the ABS Wheel Sensor Lead Connected to Test it. - Switch on the Ignition and after the ABS Warning Light Initially Comes on, it Should then Go Off, Indicating the Fault has been Fixed.

Rover 800 820 825 827 ABS Brakes Replacing a Faulty Wheel Sensor.
Disconnect the Lead, and Fit it in Place under the Wheel Arch, pushing the Connector on the Lead back through to the bonnet and finishing off by Reconnecting it for the final time.

Job Completed!

All that remains is to Clear the ABS Fault Code Memory if you so choose.

To do this, from the Ignition 'ON' position, turn the Ignition 'OFF' then back on 20, yes 20 times! (as shown in the video at the top of this page, thanks!)




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