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Want to know where relay is or how to fix po685

Customer Question
Want to know where relay is or how to fix po685
Submitted: 2 years ago.Category: VW
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VW Mechanic: Kevin, VW Mechanic replied 2 years ago

Please let me know if you need anything else and remember to rate my service

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Customer reply replied 2 years ago
Sorry but relay never mad a diffrent I'm lost! I have no spark is that what relay does?
VW Mechanic: Kevin, VW Mechanic replied 2 years ago

The relay powers up ecm have you checked fuses?

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Customer reply replied 2 years ago
all fuses are good! There is power at relay! This doesn't make sense! I have fuel ! No spark took coil pack out of hole put spark plug in nothing!
Customer reply replied 2 years ago
This car maybe has a bad crank sensor and this is a false code?
VW Mechanic: Kevin, VW Mechanic replied 2 years ago

My info system is down i would expect two terminals to have power with ignition on for relay to work il get back to you once ive got wiring diagram up

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Customer reply replied 2 years ago
Do not have power in two places! Just one
Customer reply replied 2 years ago
It was not crank sensor
VW Mechanic: Kevin, VW Mechanic replied 2 years ago

I can find diagram il opt out as another tech may have this but the input missing from relay is your issue but without diagram i dont know where it comes from

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VW Mechanic: Juan Crespo, ASE Certified Technician replied 2 years ago
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: VW
Satisfied Customers: 1,532
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Unplug the relay and check for power at socket terminals 30/1 and 86/3. If only 30/1 has power, there is an open circuit in the relay panel - you could temporarily bridge the terminals, then plug the relay back in and see if the engine starts.

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