Suzuki DF150 Service Manual page 113

3-54 ENGINE CONTROL SYSTEM
FUEL INJECTOR OPERATING SIGNAL
34 pin test cord
(White connector)
27 28 29 30 31 32 33 34 35 36 37 38 39 44 45
40 41 42 43 57 58
Wire harness
! 09930-89340: 26-pin & 34-pin test cord
Peak voltmeter Stevens CD-77
' Tester range: NEG 50
1. Disconnect all ignition coil connectors.
2. Connect test cord between ECM and wire harness as shown
in figure then turn ignition switch ON.
3. Connect the tester probe ("-", Black) to starter motor mag-
netic switch "B" terminal (connected to battery positive +
terminal) as shown in figure.
4. Connect the tester probe ("+", Red) to each terminal.
Injector Terminal
No. 1 54
No. 2 36
No. 3 28
No. 4 53
5. Crank engine and measure voltage.
Fuel injector operating signal: 6 – 10 V
ECM
46 47 48 49 50 51 52 53 54 55 56
59 60
(Black connector)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
(White connector)
28
Wire color
(engine harness)
O/B
B/Br
R/W
Lg
26 pin test cord
(Black connector)
36
(White connector)
(Voltage)
12 V
Starter motor magnetic
switch "B" terminal
(Black connector)
34 pin test cord
* Peak voltage reading (NEG)
0 V level for peak voltmeter
53 54
(Time)