The 'ABS out of use' warning message appears on the dashboard of my 1997 XM
(2 litre Turbo Petrol) shortly after the engine starts.
The brakes still work well.
I want to do as much testing/checking as I can before I hand it over to the
garage to repair. What are the most common faults?
I plan to measure the resistance of the wheel sensors first. If the Haynes
manual schematic is correct I should be able to disconnect the plug from the
ABS control unit and connect a multimeter to the plug pins.
I will also check the earth connections and sensor gap.
Is there anything else I can check?
The Haynes manual recommends disconnecting the battery earth lead before
removing connections. Will that have any other effects on the cars
electrics when I reconnect the battery (i.e. immobilising the radio)?
If the ABS control unit is faulty, am I limited to XM units?
Where is the ABS hydraulic unit mounted? Is it on the left hand side under