Vince, did you ever resolve this issue?
It suddenly happened to me after I fitted a donor DSC module (done the same previously without issue).
Last time i drove the car to work to program and encode using ISTA/P but this time i used Tool32, NCS Expert and INPA. I have a feeling the Tool32 method of writing the VIN stuffed things up.
Even after a full recode in ISTA/P i still have the same problem.
I tried connecting both of my spare DSC control units (all are coded to my car), same two faults (A3AF and CDAD) persist.
I also went as far as chopping and soldering in a new section of wire for the speed signal output from the DSC to the bundle of wires under the dash, believing i may have disturbed the harness too many times from swapping masters, boosters, DSC modules etc. No change.
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