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My ATV has a cat engine that I recently put a new fuel pump an injector in. I tried to check for codes and TPS but I am unable to get it into diagnostic mode. I jump at plug and nothing shows on pod. I thought maybe a bad wire but I ohmed from diagnostic plug to ECU and checked out. I then checked voltage at blue/red wire at diagnostic plug and it was reading ground, which seemed odd. I then cut wire right after plug on ECU to remove any doubt in harness and it also showed to have a ground. Is my ECU bad? What other checks can I do to confirm, if any? I don't have any others to check with.

Any help is appreciated!

Thanks - Matt
 
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