ENGINE CONTROL SYSTEM 3-41
FUEL PUMP 3 SEC. OPERATING SOUND
Turn the 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 the pump is in the
fuel vapor separator. If you cannot hear clearly, use a sound
scope or long blade screw driver.
IGNITION COIL OPERATING SIGNAL
# 09930-89950: 44-pin test cord
' Peak voltmeter Stevens CD-77
Tester range: NEG50
1. Connect the test cords as shown, then turn the ignition switch
ON.
2. Connect the tester probe - (Black) to the starter motor relay
right terminal (connected to the battery positive + terminal)
as shown.
3. Connect the tester probe + (Red) to each terminal.
Ignition coil Terminal No.
No.1 & 4 44
No.2 & 3 43
4. Crank the engine and measure voltage.
Ignition coil operating signal: 6 – 10 V
Injector Terminal No.
No.1 40
No.2 39
No.3 38
4. Crank the engine and measure voltage.
Fuel injector operating signal: 6 – 10 V
(Voltage)
12V
(Time)
A
B
A Peak voltage reading (NEG)
B 0V level for peak voltmeter
(Voltage)
12V
(Time)
A
B
A Peak voltage reading (NEG)
B 0V level for peak voltmeter
3. Connect the tester probe + (Red) to each terminal.
High pressure
fuel pump
No.4 22
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