After letting this truck set for a few weeks, its going into limp mode again. J1939 codes. Would the volvo mechanic be able to plug it into a computer and diagnose the problem? Would it tell them more than what I see on the DIC?
99 volvo only idles
Discussion in 'Volvo Forum' started by 7060, Jul 31, 2011.
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the problem is simple. short ore craked J1939 twisted wires. check from cab-chassis connector to engine ECM first.
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Where it plugs into the ecm is it the top or bottom plug that matches up with the cab connector?
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Engine ECM, righ hand connector, twisted wires. on VECU - central connector...
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please pablo
can you post photo
it will be very easy like me new able to trace problem
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Hello
Just've done the same problem but on cabover
Your problem is that you do not use instrumental cluster for diagnostics
First of all try to read fault codes.
Usually engine idles only if both J1939 and J1708 lines are damaged (cummins idle if J1939 is bad, J1708 is not used as spare line).
So I sugest u have datalink ore CAN problen before, but problem was ignored till other line failed too.
And check TPS sensor too! -
Thanks pablo for quick reply
Error are coming
mid127
saej1939
datalink component active
129I
55
7
engine road speed unknowfully active
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