Please find to follow copy of letter to Brian Curry re: ABS diagnostics. Hope is of interest.
Dear Brian,I found your information on ABS diagnostics via a link from a very good British BMW breakers site http://www.james-sherlock.co.uk/.
With your info along with Richard Paton's I have fixed my 16v RS's fault.
However I found readings for resistances into the modulators as below:
Computer connector pins:
| Front | Rear | |||
|---|---|---|---|---|
| 6(-) to 9(+) | 4.4K | |
7(-) to 11(+) | 4.4K |
| 6(-) to 10(+) | 1.9M | |
7(-) to 12(+) | 2.1M |
| 9(-) to 10(+) | 1.9M | |
11(-) to 12(+) | 2.1M |
I suspect the readings depend upon how much current the meter used injects. Maybe there is an active device of some sort, probably a darlington power transistor to drive the coil in the unit because using the diode check function on my meter (Fluke85) I obtained the following readings:
Computer connector pins:| Front | Rear | |||
|---|---|---|---|---|
| 6(-) to 9(+) | 1.79V | |
7(-) to 11(+) | 1.79V |
| 6(-) to 10(+) | 1.59V | |
7(-) to 12(+) | 1.59V |
| 9(-) to 10(+) | 1.49 | |
11(-) to 12(+) | 1.50V |
Hope this is of interest and thanks for your very useful information.
Regards Andy Keatley
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