Troubleshooting Chart - Engine
Engine will not turn over.
Possible cause Remedy
Battery dead. (Truck may be jump started.)
Have battery inspected and charged or re-
placed by authorized service personnel.
Poor connections at battery cables.
Have battery cable connections inspected,
cleaned, and tightened by authorized service
personnel.
Defective main fuse (F1).
Have electrical system inspected by authorized
service personnel to determine cause.
Defective starter relay.
Have starter relay inspected and repaired by
authorized service personnel.
Damaged or defective starter.
Have starter inspected and repaired by author-
ized service personnel.
Defective brake switch.
Have brake switch inspected and repaired by
authorized service personnel.
Defective key switch
Have key switch inspected and repaired by au-
thorized service personnel.
Engine fails to start
Possible cause Remedy
Manual shut-off valve on LP tank is closed. Open manual valve on LP tank.
LP tank empty. Install a new tank of LP gas.
LP tank incorrectly installed.
Ensure LP tank is correctly installed so that
tank locating pin is properly engaged.
Temperature of the LP gas in the tank is too
low.
Warm the gas system and lines with hot water.
Do not use naked flame or hot air.
Fuel line obstructed.
Have fuel line inspected and cleaned by author-
ized service personnel.
Gas shut-off valve does not open.
Have shut-off valve inspected and repaired by
authorized service personnel.
LP filter clogged. Change LP filter.
Ignition wiring wet (condensation). Thoroughly dry the ignition wiring.
Spark plugs or cables loose or defective.
Have ignition components inspected and re-
paired by authorized service personnel.
Engine fuses (ignition coils,O2 sensors, LP
shut-off valve) defective.
Have electrical system inspected by authorized
service personnel to determine cause.
Defective crankshaft speed sensor.
Have crankshaft speed sensor inspected and
repaired by authorized service personnel.
Defective ignition transformer.
Have ignition transformer inspected and re-
paired by authorized service personnel.
Defective evaporator or mixer.
Have fuel system inspected and repaired by
authorized service personnel.
5
Maintenance
Troubleshooting
270 Operating Instructions-1202 series LP 12028011590US-11/2022 - 04
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