[R129 SL] ADS

[Jan Kuylaars]

See my comment two day's ago about the ABS sensors.
In your car they use a cable with six wires inside, two for the brake
pad thickness, two for the speed sensor  abs-ads,
and two for the alignment from the ADS.
 
So if there is a wire broken, and makes for a longer period of time no
contact, the computer can see that and switch off the system.
So maybe you must change the cable between the connector from the sensor
and the connector in the motor compartment.
Also it is possible ( I had it myself) that the connector makes a bad
connection. It are two gold plated fine needles , and it is easily to
disturb the position. But also to correct it.
 
But the sensors you can measure with a ohm meter. It should be at the
connector in the motor compartment about 900 K ohms.
 
If you have a meter with a low ac voltage or better a frequencies
counter, it is easy to discover if the sensors are working.
 
Make a connection to the cable, lift the front wheel off the floor, and
give a turn on the wheel.
If the sensor and cable is correct it should read about a couple of
mVolts and about 70 Hz .
When the wheel is turning slower, the voltage and the HZ will read less.
 
So you can measure the sensor at the connector at the suspension on the
same way. 
And then if you are there, you simply can make an short circuit test
between the two connectors from the cable, shake a little with the cable
and looks if the
connection will stay. If it go's up and down, there can be a broken
wire.
 
Good luck, I did it 
 



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Jan Kuylaars
Technical Manager 	Rian BV
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5581 BL Waalre
Noord Brabant.
The Netherlands 	
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