Suzuki DF 90 - Component Inspections

ENGINE CONTROL SYSTEM 3-39
FUEL INJECTOR OPERATING SOUND (INDIVIDUAL)
1. Disconnect fuel injector wire, and connect the test cord.
\ 09930-89260 : Injector test cord A
2. Connect Gray wire to body ground.
3. Momentarily touch Black/Yellow wire to starter motor mag-
netic switch “B” terminal (connected to battery positive +
terminal), and check for injector operating sound.
Injector operating sound : “Click”
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Connecting fuel injector to battery positive for more
than a few seconds may cause injector overheating and
possible injector solenoid failure.
FUEL PUMP 3 SEC. OPERATING SOUND
Turn ignition switch ON and check for fuel pump operating
sound.
Fuel pump operating sound :
Sounds for approx. 3 seconds only
NOTE:
Fuel pump operating sound is low because pump is in fuel va-
por separator. If you cannot hear pump sound clearly, use a
sound scope or long blade screw driver.
COMPONENT INSPECTIONS
NOTE1:
Disconnect remote control wire harness, and connect tester
probe to terminal
A (Gray wire).
FUEL INJECTOR OPERATING SOUND (CRANKING)
1. Touch a sound scope or long blade screw driver to fuel in-
jector body as shown.
2. Crank engine and check for injector operating sound.
Injector operating sound : “Click”
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1. Vapor separator / High pressure fuel pump1. Vapor separator / High pressure fuel pump
Injector bodyInjector body
“Click”“Click”
“Click”“Click”
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1. Magnetic switch “B” terminal1. Magnetic switch “B” terminal