Pumbaa Posted January 2, 2018 Share Posted January 2, 2018 I have a 2003 ch613 and got codes for injection ecu faulty and all injectors besides number 1. I started leaning towards a bad ecm so I swapped a ecm 12ms510m2 in it just to see what it does and all that came up was mid 128 sid 231 fmi 8 (sae j1939 data bus) and then only injector #6 came up mid 128 sid 6 fmi8. The origina ecm is 12ms523m. Any thoughts or advice?This is a truck I’m planning to buy from current employer so I’m tinkering with it here and there just to get a heads up on what’s ahead Quote Link to comment https://www.bigmacktrucks.com/topic/52112-need-ecm-wiring-harness/ Share on other sites More sharing options...
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