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2003 LB7 duramax u2104 u2105
4 years 6 months ago #34737
by Autolodge
2003 LB7 duramax u2104 u2105 was created by Autolodge
Hi all, new here but not a new auto tech. Just acquired a 2003 LB7 duramax that has a communication problem on the J1939 circuit. Previos owner had Dealership already replaced/reflashed TCM, checked trans harness, replaced Neutral safety switch and connectors, replaced ignition switch.
I have checked pins/plugs at the ficm and Tcm. I ohmed the can bus with batteries disconnected and modules asleep and got this:
I have checked pins/plugs at the ficm and Tcm. I ohmed the can bus with batteries disconnected and modules asleep and got this:
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4 years 6 months ago #34739
by Autolodge
Replied by Autolodge on topic 2003 LB7 duramax u2104 u2105
I got this
With the ficm plugged in so it looks like the resistors in the ecm and the ficm are good. What next?
With the ficm plugged in so it looks like the resistors in the ecm and the ficm are good. What next?
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