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Old 06-15-2018, 05:13 PM
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Default Will not start

2002 firebird 3.8v6
My son'* car wouldn't start a couple of weeks ago and had a code 1589 I think. It would turn over strong but not start. I reset codes and it started. Yesterday it did it again and wouldn't start no matter what we tried. He has had trouble with the security system but this seems diferent. The code said no communication between throttle control and PCM. Any ideas?
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Old 06-20-2018, 11:20 PM
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Default Update

Have 50 psi fuel pressure, no signal to injectors, no spark. Have no voltAge at pink wire at ICM. Where does this wire feed from? We heard clicking noise at throttle control and got 12V at ICM. It started twice (low power) then wouldn't start again.
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Old 06-21-2018, 08:42 PM
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Pink wire gets power from ENG CNTRL fuse 15A in underhood fuse block....

If no power there, it is fed by the IGN relay and the 50A IGN fuse....
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Old 06-22-2018, 06:38 AM
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Is the Security light flashing?
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Old 06-22-2018, 07:57 AM
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I forgot to mention, that relay feeds the 15A fuse and also the injectors......so turn key on and see if there is power to the injectors....
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Old 06-23-2018, 12:51 AM
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Have voltAge at all the fuses. Borrowed a scanner from a mechanic and cleared codes. Now it starts. We think it'* in the fuse box because we had power at all the fuses but no power at the ignition module.
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Old 06-25-2018, 04:35 PM
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Originally Posted by 97BONNIESE View Post
Have voltAge at all the fuses. Borrowed a scanner from a mechanic and cleared codes. Now it starts. We think it'* in the fuse box because we had power at all the fuses but no power at the ignition module.
Thanks for letting us know how it turned out!
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Old 08-01-2018, 06:55 AM
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Default Still have problems.

We have a wiring issue. Where can I find a good wiring diagram for ignition, BCM, etc? Trying to see how the wire at the ignition module runs. Have 12V there and ignition switch at times. Seems to be a bad connection some where.
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Old 08-01-2018, 09:44 AM
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Alldatadiy.com

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Old 08-01-2018, 09:35 PM
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