Engine General Information and Diagnosis: 1A-96
3 1) Measure the fuel pump relay switch side voltage
between the R/W wire “C” and ground.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Tester knob indication
Voltage ( )
Fuel pump relay switch side voltage
Battery voltage
((+) terminal: R/W – (–) terminal: Ground)
2) If OK, then measure the fuel pump relay coil side voltage
between the O/W wire “D” and ground.
3) Turn the ignition switch ON, engine stop switch is in ON
position, side-stand to upright position and measure the
voltage.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Tester knob indication
Voltage ( )
Fuel pump relay coil side voltage
Battery voltage
((+) terminal: O/W – (–) terminal: Ground)
Is the voltage OK?
Replace the ECM with a
new one. Refer to “ECM
Removal and
Installation in Section
1C (Page 1C-1)”.
Open circuit in the R/W
wire or O/W wire.
Step Action Yes No
“C”
(A)
I944H1110150-02
“D”
(A)
I944H1110151-02
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