Suzuki DF 40 Service Manual page 92

3-37 ENGINE CONTROL SYSTEM
(3) Connect the tester probe
Injector Terminal
No.1 A4
No.2 A7
No.3 A8
(4) Crank engine and measure voltage.
Fuel injector operating signal : 6 – 10 V
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 clearly, use a sound scope or
long blade screw driver.
IGNITION COIL OPERATING SIGNAL
09930-89930 : 8-pin test cord
Peak voltmeter Stevens CD-77
Tester range : NEG50
(1) Connect the test cords as shown, then turn ignition switch
ON.
(2) Connect the tester probe
right terminal (connected to battery positive (+) terminal)
as shown.
(3) Connect the tester probe
Ignition coil Terminal
No.1 A5
No.2 A1
No.3 A3
(4) Crank engine and measure voltage.
Ignition coil operating signal : 6 – 10 V
(Red) to each terminal.
Wire color
Engine Test cord
O/B B/R
B/Y B/Y
R/W Lg
(Black) to starter motor relay
(Red) to each terminal.
Wire color
Engine Test cord
O O
Bl Bl
G B/W
(Voltage)
12V
Peak voltage reading (NEG)
0V level for peak voltmeter
A B C D E
ECM
(Voltage)
12V
Peak voltage reading (NEG)
0V level for peak voltmeter
(Time)
Starter
motor
relay
(Time)