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  1. S

    D6N XL 590-9 247-9 Codes No Communication to ECM

    Got a new ECU ordered, after connecting to it externally it would still blow the fuse. Internal short inside preventing any communicatio.
  2. S

    D6N XL 590-9 247-9 Codes No Communication to ECM

    Before I go too far chasing wiring—does this still sound like an internal ECM short, or am I missing something? I’ll be building a diag cable for the 70-pin Tomorrow but I went through it a bit more today. I’ve got no communication with the engine ECM, and the engine ECM fuse blows immediately...
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    D6N XL 590-9 247-9 Codes No Communication to ECM

    I’ll go through the rest of the power wires. I did try isolating the key switch, but I disconnected it at the switch instead of the ECM, and the fuse still blew.
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    D6N XL 590-9 247-9 Codes No Communication to ECM

    Interesting definitely share if you find it! With your test harness are you powering it straight from battery? I need to take the scope out tomorrow and hook onto it to see if the wave forms are matching on the high and low.
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    D6N XL 590-9 247-9 Codes No Communication to ECM

    Did this get resolved? I have a D8T with the same codes no communication with engine ECM. I can crank and talk to implement and powertrain. Powers and grounds are good to the Engine ECU but I keep blowing the ECU fuse when the ignition is turned on. If I disconnect J1 from the ECU the fuse...
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    Engine Swap Question – 2020 CAT 308-7 w/ Kubota V3307-T

    Hey everyone, I’m working on a 2020 CAT 308-7 excavator and replacing the engine. When I checked the block, I noticed the serial number matches a Kubota V3307-T. Visually, it looks identical to the CAT-branded engine that’s currently installed. I’m curious if anyone here has experience with...
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