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Engine Cranks, no spark

Tiny
CHRIS CALDWELL4
  • MEMBER
  • 2003 CHEVROLET VENTURE
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 176,000 MILES
Issue started while driving vehicle would shut off sometimes. Replaced ignition module, camshaft sensor and both crank sensors. Checked power on pink wire on ignition module 12v. Checked ground and found 0.4 ohms to ground. Also found that the IC timing control white wire going to ignition module reading 0v. Tested when vehicle was running before, and it had 5v. Could this be the passkey 3 or PCM issue?
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Saturday, April 2nd, 2022 AT 2:10 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
This sounds like a PCM issue but to be sure we should do a CAN scan which will show for sure what's going on. here is a link to the instructions and video on how to do the job, I have also included how to change out the PCM:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

You can get one pre-programed, they have many companies that do this.
Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Sunday, April 3rd, 2022 AT 11:35 AM

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