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Old 12-03-2011, 07:26 PM   #1
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Won't start, engine comm failure,trans comm failure

2009 Dynasty 500 ISM, WON'T START. dash says ENGINE COMM FAILURE, TRANS COMM FAILURE. Looked at and checked all fuses, unless there is one hiding!!!

Anyone have any ideas???
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Old 12-03-2011, 07:55 PM   #2
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Is your shift lever lit with the key on?

Here's a wiring diagram.
Attached Files
File Type: pdf Cummins ISM Engine wiring diagram.pdf (347.3 KB, 333 views)
File Type: pdf Trans communication failure.pdf (24.2 KB, 384 views)
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Old 12-03-2011, 07:59 PM   #3
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NO, the shift lever doesn't light up!!
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Old 12-03-2011, 08:01 PM   #4
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Somebody didn't throw the on -off switch back in the engine compartment did they?


Check and see if you have some spade fuses connected on the top of your chassis batterys that might have failed. Sounds like you lost power to the ign switch.
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Old 12-03-2011, 10:49 PM   #5
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My engine ECU and tranny fuses are separate inline fuses located on the left side of the chassis battery compartment.
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Old 12-03-2011, 11:52 PM   #6
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Sounds like your chassis batteries are discharged below what the ECU's require.
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Old 12-04-2011, 07:59 PM   #7
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Rex, I agree with you. That sounds right about the chassis batteries being too low. Easy to check using the dash volt meter gauge or with a volt meter. The other thing would be to try and start the motor while holding down the BAT BOOST switch.
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Old 12-08-2011, 10:50 PM   #8
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If the generator will start you should run it about 30 minutes and then try again.
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