J1939 COMMUNICATION PROBLEM

Ask for and share advice on using the PicoScope kit to fix vehicles here.
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rburgy
OneWave
OneWave
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Joined: Wed Feb 26, 2014 3:07 pm
Location: PITTSBURGH

J1939 COMMUNICATION PROBLEM

Post by rburgy » Fri Jan 23, 2015 12:06 am

HEY GUYS
I HAVE A COMMUNICATION PROBLEM ON A HEAVY TRUCK(CUMMINS ENGINE) SEE IF I COULD GET SOME HELP WITH.
NO COMMUNICATION WITH SCAN TOOL. CHECKED FOR + AND - AT THE DLC CONNECTOR-YES.
CHECKED J1939 WIRES WITH PICO- CAN HI IS SHOWING GOOD, EVEN DECODED IT IS GIVING ME INFORMATION
CAN LOW IS SAYING THERE IS A PROBLEM WITH THE DATA. I WILL UPLOAD THE WAVEFORM SOON.
THERE IS DEFINITLEY AN ISSUE WITH THE LOW SIDE. I CHECKED IT IN 3 DIFFERENT SPOTS-ALL SAME
RIGHT AT THE PCM IT IS THE SAME ALSO.
WHERE SHOULD I GO FROM HERE?
THANKS GUYS

Liteace
TwoWaves
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Re: J1939 COMMUNICATION PROBLEM

Post by Liteace » Fri Jan 23, 2015 3:03 pm

you could start with going to the left hand side of your keyboard and pressing the CAPS LOCK key :lol:

rburgy
OneWave
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Joined: Wed Feb 26, 2014 3:07 pm
Location: PITTSBURGH

Re: J1939 COMMUNICATION PROBLEM

Post by rburgy » Tue Jan 27, 2015 11:15 pm

I don't believe that will help with the data line.

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