4562 690 05 Rev. H KohlerEngines.com
EFI SYSTEM-ELECTRONIC THROTTLE BODY (ETB)
Function Test
WARNING
High Pressure Fluids can puncture skin and
cause severe injury or death.
Do not work on fuel system without proper
training or safety equipment.
Fluid puncture injuries are highly toxic and hazardous.
If an injury occurs, seek immediate medical attention.
Function of fuel system is to provide suffi cient delivery
of fuel at system operating pressure of 39 psi ± 3. If an
engine starts hard, or turns over but will not start, it may
indicate a problem with EFI fuel system. A quick test will
verify if system is operating.
1. Disconnect and ground spark plug leads.
2. Complete all safety interlock requirements and crank
engine for approximately 3 seconds.
3. Remove spark plugs and check for fuel at tips.
a. If there is fuel at tips of spark plugs fuel pump and
injectors are operating.
b. If there is no fuel at tips of spark plugs, check
following:
1. Make sure fuel tank contains clean, fresh,
proper fuel.
2. Make sure that vent in fuel tank is open.
3. Make sure fuel tank valve (if equipped) is fully
opened.
4. Make sure battery is supplying proper voltage.
5. Check that fuses are good, and that no
electrical or fuel line connections are damaged
or broken.
6. Test fuel pump module operation as described
earlier under Fuel Pump Module.
Fault Codes
Example of Diagnostic Display
One second pause
One second pause
One second pause
One second pause
Three second pause
(0)
(0)
(7)
(6)
(1)
(1)
End Code 61
Fault
Code
0107
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