No any error in window 2 (truck doctor) but no voltage to 1Y5(shutoff solenoid), 1Y4 (enable valve) and 1Y1 (butterfly RPM valve; disconnect 1Y5 and supply 12VDC directly, engine can start but without RPM control: window 6: nB1:0 even engie running ; have replaced new RPM sensor and LHC module but problem are the same.
Any one have experience with this problem before, please give me a help.
Thanks,
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