This makes no sense. The connector is what tells you which terminal. Let's try this a different way...well if i knew what terminal everything came from nothing would be a problem. how are you supposed to tell what terminal a wire comes from when the connector prevents you from seeing anything?
Great addition to this thread! :thumbup:old thread... hope you got it whooped. if not figured i throw this in here for further peoples searches.
IIRC the knock box primes the pump at power on for a second, then it shuts the pump off until until the engine starts turning (hall input).How does the fuel pump prime?
strange, there is no fuel pressure switch or sensor so I"d say the fuel pump priming is not pressure related..If the pressure is already high enough the fuel pump doesn't do anything.
The scheamtic I am going of shows a "cranking" wire to T24 on the fuel computer as well. Not sure why the CIS computer cares though. On an electronic injection system it would go into a different cranking map. On CIS the cold start colenoid is driven directly from off the starter. Must do some other stuff durring cranking. Regardless I think we both agree T10 does not go the the starter.Take a look at the Bentley schematic for Engine Controls - 16-valve Scirocco and notice the +12v wire running FROM the starter (called 15a) - actually 2 wires,
one to the Cold Start Valve.
one to the ECU T24 - a cranking signal.
That's exactly what I was going to ask/say. Even if there was a pressure switch, the knock box controls the fuel pump and it definately does not have a pressure switch input.IIRC the knock box primes the pump at power on for a second, then it shuts the pump off until until the engine starts turning (hall input).
strange, there is no fuel pressure switch or sensor so I"d say the fuel pump priming is not pressure related..