Won't start, engine comm failure, trans comm failure

[twincessna]

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???

[bluepill]

Any recent events? Hard bumps, electrical problems, etc.

Always wise to look under the engine for possible damage to wiring. Mice sometimes like to lunch on it as the weather gets colder. Also check battery connections & grounds.

[Chickadee]

twincessna:

Please describe a little more fully. For example, when ya turn the key, does the engine turn over or is it simply....dead??

Steve & Lynette

[Iron Man]

If you are showing no voltage on the voltage gauge double check the ecm fuse. Ours kept shorting out causing the message you see and the engine would turn over and not start and was getting no voltage on the voltage guage. Also check the power and ground plug on the ecm. On my ISM the ecm is mounted on the passenger side of the motor. It is a 4 pin plug but only 2 pins (power and ground) are used.