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Not cranking over

Tiny
SANDDIGGER
  • MEMBER
  • 2007 MAZDA CX-9
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 134,000 MILES
When the ignition position is on the cooling fans are on full blast and when I disconnect the fan relay The TPS sensor starts to buzz. I've already tried jumping the starter relay to make sure it's okay I tried replacing the battery I tried replacing the throttle body and I tried replacing the PCM and nothing has worked yet. Any help is appreciated.
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Thursday, May 2nd, 2019 AT 1:42 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,081 POSTS
Hello,

First check the ground cables from the battery to the frame and then to the engine, they must be in good condition and tight. If that okay lets check the ignition switch connections. here is a guide to help you with the ignition switch wiring diagrams so you can see how it works:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find.

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Saturday, May 4th, 2019 AT 10:49 AM

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