Cranks, but no start, no spark?

2015 INFINITI QX60

170,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC

SM2023

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I checked for spark with a spark test and there is no spark, but a test light works. Replaced Crankshaft sensor with an OEM part. Getting 5v of both power (blue) and signal (green) wire. I also tried spraying starter fluid into the intake, to eliminate fuel system to be an issue. It did not start. Any suggestions/help will be greatly appreciated.

Jun 8, 2023 at 9:56 PM

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The first thing we need to do is check the fuses here is a guide that will help and the fuse locations in the diagrams below, please check the fuses with the systems on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuse is okay, I would disconnect the MAF sensor because when they have a problem the computer will not turn the ignition system on. Let's run the codes as well by doing a CAN scan, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a guide to help:

https://youtu.be/u-4syLc-ifQ

If no codes come up, I have seen the IPDM go out causing this issue. Here is the location of the sensor and how to replace the IPDM as well, #12. Check out the images (below). Please let us know what you find.

Images (Click to enlarge)

Jun 9, 2023 at 1:27 PM