[s-cars] Bad ground connection

[Wayne Dohnal]

I'm chasing an engine problem and it looks like one of my ground lines isn't 
grounded.    It's ground #201 and goes to the ECM, ECT sensor, TPS, 
atmospheric pressure sensor, and knock sensors.  The ground lines at the 
sensors are connected to each other, but not to ground.  All I can find in 
the Bentley is that it's ground connection 5 in the engine wiring harness. 
I've found 6 ground wires bolted to the intake manifold and they're all ok. 
Does anybody know where the ground connection 201 is actually connected to 
ground?  Are there other grounding wires besides the 6 intake manifold wires 
to look at?

Wayne
1994 S4