Engine shut off while running, cranks will not start

Tiny
PRESTONECK
  • MEMBER
  • 2008 VOLKSWAGEN JETTA
  • 2.5L
  • 5 CYL
  • 2WD
  • AUTOMATIC
  • 99,200 MILES
Okay here it goes. A couple days ago it quit running. The engine will crank and turn over but will not start up. Also the engine light will not come on and my diagnostic scanner can’t connect with the ECM. First thing I did was to check all my fuses but they were all fine. So then I pulled the ECM and check the power and ground wires and all were fine. So then tried putting a different ECM in but that didn’t change anything. So now I’m not sure what to do.
Wednesday, May 1st, 2019 AT 9:28 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,285 POSTS
Hello,

In fuse panel B there is a motronic engine control relay that needs to be checked here is a guide to help us test the relay and the engine wiring diagrams so you can see how the system works and the relay location as well.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

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Thursday, May 2nd, 2019 AT 2:19 PM

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