After a little more digging I found this table, attached, and the pic of inside one of these “relays” - it’s clearly the control module on the earlier cars, as it contains a lot of stuff which presumably later was moved to the valve on the rack.
Apparently the later servotronic module i have had the “boost” reduced in response to complaints from customers about too light steering, hence the earlier one was superceded.
That’s all on pre 2003 cars though, as per the table.
What I still can’t understand is why vcds can’t find the steering assist module on my car. Maybe I’m looking at the wrong module in vcds. I’ll have another look.
|