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Audi 80, 90, Coupe: 1988-1992 (B3) Cold start valve circuit only 5-6 volts.


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Lugnuts

Posts: 1
Registered: 03/06/14
Cold start valve circuit only 5-6 volts.
Posted: Mar 6, 2014 5:44 PM
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What could be the reasoning behind the KE3-Jetronic sending only 5-6 volts to my cold start valve? The car will not start in below freezing temps without the help of the valve.

Checked pin-out on CIS and found appx. 6-8 seconds of only negative 5-6 volts at #18 ground circuit.

+11.2vdc maintains on pin 1 at cold start valve.

Continuity is .2ohm across wire to valve.

When grounded, CSV opens and engine starts via jumper wire.

CSV also tests OK with CIS diagnostic 12v.

Ground is good to ECU.

1988 80Q

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