Have you read the article in DIY?

I don't know about the X92 connector. The two possible diagnostic sockets are X11 and X11/4 I think (being without diagram). The only one most cars from 86-90 is the one on the driver's fender.

In it, on pin# 3 the duty cycle (integrator) can be read. To ask which scale infers that you don't understand duty-cycle. It is a percentage.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician