CAT ET not communicating in a 04 379

DblElowboy · Mar 20, 2020

pushbroom said: ↑

Have you ever been able to hook up to the truck? Gliders kinda suck for diagrams because no idea whose engine harness is on it and if they added the extra datalink in the cab or not.
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Also it is a 389 model glider forgot to add that earlier

QUALITYTRUCK · Mar 20, 2020

check for power 12v+ at 9 pin diagnostic connector

Javi08 · Jun 16, 2021

Hello I got apete 2000 379 cat c15 and hook up the computer to it and is not reading any help please

Javi08 · Jun 16, 2021

I have the same problem with my pete 2000

C15Mike said: ↑

HI I went to hook up my laptop with cat et to my truck today and its not communicating with the ECM. When I bought the truck last year the dealer had to hotwire the ecm to read it, I figured whatever they did they would of left, But they didn't just my luck. I have a constant 12.8 volts to the "B" wire so its not that wire however I have no idea where the other 3 wires in the connector go. Its a 6 pin J1939 connector and has 4 wires total in it. Its a 04 379 with a MBN C15, does anyone have a wire schematic or know where these wires go to in the ECM? Any help is appreciated. Thanks!
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0

C15Mike said: ↑

HI I went to hook up my laptop with cat et to my truck today and its not communicating with the ECM. When I bought the truck last year the dealer had to hotwire the ecm to read it, I figured whatever they did they would of left, But they didn't just my luck. I have a constant 12.8 volts to the "B" wire so its not that wire however I have no idea where the other 3 wires in the connector go. Its a 6 pin J1939 connector and has 4 wires total in it. Its a 04 379 with a MBN C15, does anyone have a wire schematic or know where these wires go to in the ECM? Any help is appreciated. Thanks!
Click to expand...

Javi08 · Jun 16, 2021

pushbroom said: ↑

Cat and Pete diagrams attached. Check for power and ground first. If you have good power and ground but cannot hookup you have a datalink issue Let me know if you need help deciphering the diagrams or tracking down a circuit.
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Hey pushbroom I have a pete 2000 379 c15 and went I hooked the computer to it is not communicating? Any help please

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