Komatsu FG30SHT-16:
no power to fuel solenoid valve

the customer subjected the truck to a hard impact, and it lost power to the valve. My question is, where does the solenoid valve get its power from? thanks
  • Posted 28 Jul 2016 02:14
  • Discussion started by eric_h
  • Michigan, United States
Showing items 1 - 2 of 2 results.
is there a way to test the integrity of those sensors? I hooked up the test box and have readings indicating rpm and timing @2degrees BTDC while cranking. at rest, it reads 110degrees BTDC. I have battery voltage to the relay, but nothing from the relay to the cut off valve.
  • Posted 30 Jul 2016 00:58
  • Reply by eric_h
  • Michigan, United States
B+ battery power comes through the key switch, fuses and relays.
The relays close to provide power from a signal in the computer, in trucks made after 2004.
Usually the fuel relay does not energize because some other sensor has not worked properly and the computer (properly) shuts off (or never turns on) power to allow flow in the fuel system.
my bet, on this truck, is the crankshaft sensor, but could be a few others, including the cam shaft sensor or the O2 sensor.
  • Posted 28 Jul 2016 23:28
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"

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