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Engine cranks no start

Tiny
PANCHO G
  • MEMBER
  • 1999 PLYMOUTH VOYAGER
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 189,623 MILES
I shut the van off and went to start it and it would crank over but not start. I checked for spark and no spark. I replaced the crankshaft sensor and coil assembly and still no spark but cranks fine. I tried hooking up a scanner but it says there is no communication with the scanner. Please help.
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Saturday, May 7th, 2022 AT 2:01 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

The first thing that comes to mind is the ASD relay (auto shut down). It is located in the under-hood fuse box. See pic 1 for location.

Switch that relay with a different one having the same part number to see if it makes a difference. If there isn't one, here is a link that explains how to test it:

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

If that checks good, go to the data link connector and check pin 16 for 12v battery power. Also, confirm pins 4 and 5 have continuity to ground. (See pic 2)

Here is a link you may find helpful:

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

Let me know what you find.

Take care,

Joe

See pics below.
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Saturday, May 7th, 2022 AT 10:36 PM

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