Advance acoustic Exterra 56507000, Quick Start Troubleshooting Manual

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24 - FORM NO. 56043110 - Exterra
™
ENGINE SYSTEM
TROUBLESHOOTING GUIDE
Troubleshooting Guide
Symptom
Kubota 3 cylinder engine G/LP will crank but not start
Part A: Electrical Control Circuit
Note 1: Check for 12V’s at the CB5 ignition circuit breaker 10A. If no input voltage @ the
Orn/Grn wire repair or replace wiring or key switch.
Note 2: Check the fuel supply (empty tank).
Note 3: Follow proper engine starting steps reference operator manual.
Using a spark plug tester check for
spark @ each cylinder.
Engine will crank but not
start
For 3 Cyl. G/LP engines
check for 12V’s @ the
ignition igniter (+) red wire.
Check electrical function of the oil
pressure SW S27.
• Pink 12V’s from key SW when key is
released from start mode.
• Blu/Pink 12V’s only engine cranking
thru diode.
• Red/Yel 12V’s from pink, output to
igniter. Oil pressure S27 SW
operational.
Engine still will not start
• No spark all cylinders,
substitute a new igniter assy.
• Otherwise replace bad coil
wire assembly for the non
sparking cylinder.
Engine still will not start ?
See Kubota engine service
manual for model DF972-E2
and reference the functional
inputs for the igniter.
Select Fuel Type
Gasoline LPG
Check for
12V’s @ fuel
pump
Check
for 12V’s
@ fuel
lock-off
Repair
wiring to fuel
pump or
LPG lock-off
Replace
LP fuel
lock-off
• Check fuel filter
pick-up screen
• Check fuel pump
output repair or
replace
See engine service manual reference fuel system
section then test:
• LPG fuel regulator pressure and function
• LPG carburetor solenoid valve function
• Gasoline carburetor solenoid valve function
• Ignition igniter input & output functions
No
Yes
No
Yes
No
No
Yes