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..

Attached Thumbnails

 

Attached Files

	vacuum-engine-stop-with-carkey-ra07206020010x.pdf (109.3 KB, 215 views)
	fuel-cutoff-wiring-1-AEMA158.pdf (108.1 KB, 221 views)

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1992 300SD 140.134 Sold