5B.13
Section 5B
EFI Fuel System
Figure 5B-12. Relay Connector.
3. Set meter for DC voltage. Touch red tester lead
to the #30 terminal in relay connector. A reading
of 12 volts should be indicated at all times.
4. Connect the red lead of meter to the #85
terminal in relay connector. Turn key switch to
the “on” position. Battery voltage should be
present.
a. No voltage present indicates a problem with
the key switch, in the wiring, or at the
connector.
b. If voltage is present, the wiring to the
connector is good. Turn the ignition switch
‘‘off’’ and proceed to Step 5 to test therelay.
Terminal #87 -
Feed To Ignition
Coils, Fuel
Injectors, and
Fuel Pump
Terminal #86 -
Ignition
Switch Voltage
Terminal #87A -
Not used
Terminal #85 -
ECU
Controlled
Ground
Terminal #30 -
Permanent Battery Voltage
Terminal #85 -
ECU
Controlled
Ground
Terminal #87 -
Feed To
Ignition Coils,
Fuel Injectors,
and Fuel Pump
Terminal #86 -
Ignition Switch
Voltage
Terminal #30 -
Permanent Battery Voltage
Terminal
#87A -
Not used
Figure 5B-14. Style 1 Fuel Injector.
2. Connect the black lead of VOA meter to a chassis
ground location. Connect the red lead to the #86
terminal in relay connector (see Figure 5B-12). Set
meter to test resistance (Rx1). Turn ignition switch
from “off” to “on.” Meter should indicate continuity
(ground circuit is completed) for 1 to 3 seconds.
Turn key switch back off.
a. Clean the connection and check wiring if
circuit was not completed.
Figure 5B-13. Relay Terminal Details.
5. Connect an ohmmeter (Rx1 scale) between the
#85 and #86 terminals in the relay. There should
be continuity. See Figure 5B-13.
6. Attach ohmmeter leads to the #30 and #87
terminals in relay. Initially, there should be no
continuity. Using a 12 volt power supply, connect
the positive (+) lead to the #85 terminal and touch
the negative (-) lead to the #86 terminal. When 12
volts is applied, the relay should activate and
continuity should exist between the #30 and #87
terminals. Repeat the test several times. If, at any
time the relay fails to activate the circuit, replace
the relay.
Fuel Injectors
Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
www.mymowerparts.com
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