I have gotten a membership to AllData, and got the info specifically for this car, but their info is not accurate and very limited. I know you all here are better experts!
When you did the testing, which ports opened/closed for you?
Quote:
Originally Posted by wwii
All for the 92 w140 300SD:
functional description : vacuum-engine-stop-with-carkey.pdf
wiring diagram : fuel-cutoff-wiring-1.pdf
testing steps : test-key-operated-stop.png ... not very easy to figure out (for me anyway) and there is a typo "56 seconds" instead of "5-6 seconds"
With the engine idling I pulled the Y9/1 connector and there was zero volts across it. Left it disconnected, turned off the key and saw battery/charging voltage for about eight seconds, then it went back to zero. Engine kept running till I pushed the stop lever down. Pretty much what step 2 in that test procedure said..
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