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Thanks for the help, but i'm still stuck.......
Cable V-41 is switched through a 24VDC N/O relay to ground which is in turn controlled by a PLC. This operation is working correctly.
Gone Fishen - "Sometimes you are pushing to much power into the ecm and creating excessive power"
Can you please explain further? surely Ohms' law limits amperage no matter how it is switched?
DieselSVT -
It is unsuitable to recycle the ignition supply after an aux shutdown, because I have used a serial converter to convert canbus to modbus in order to control and display all engine parameters remotely via a touch screen.
When ignition source is switched off it flags up all engine alarms eg. low engine voltage, engine temperature, etc, because of the loss of canbus, and initiates a complete shutdown of the unit. I need to avoid this ideally so I don't have to write a new program for the PLC. It's fairly complex already.
Any other ideas? Please, i'm stuck.
I'm sure it's a detroit problem. I have another unit the same and that is starting to show the same symptoms when under test. That rules out loose terminals etc.
Thanks guys.
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