Yamaha VMX12HC (1995) [360/405] Fuel pump system

Yamaha VMX12HC (1995) [360/405] Fuel pump system
FUEL PUMP SYSTEM
Lead Color
R/W
R
Switch Position
"
FUEL
"
(RESERVE) SWITCH TEST
Pocket Tester on the
"
Ohm
x
1
"
position.
Switch
may be checked for continuity with
a
OFF
ON
0
0
FUEL PUMP RELAY TEST
1.
Remove:
cover
(left)
pump operation
2. Check:
Refer to
"
FUEL PUMP TEST
"
section.
3. Measure:
*Battery voltage
Use the Pocket Tester
Out of specification Replace relay.
Main and engine stop switches
are
"
ON
"
po
-
sition.
Fuel Pump Relay
Input
Voltage:
12v
Black
FUEL PUMP TEST
Ope
ration
The diaphragm
is
pulled
left
by the plunger
allowing fuel to be sucked into the fuel chamber.
Fuel
is
pushed out from the pump until carb
float chamber
is
filled with fuel, and then the
cut
-
off switch cuts off the circuit.
When the spring pushes the diaphragm further
t o the end, the cut
-
off switch turns on and the
solenoid coil pulls the plunger with the diaphragm
forcing fuel into the fuel chamber.
NOTE:
When the main and engine stop switches are
ON,
the fuel pump relay
is
activated for five
seconds
at
which time the fuel pump operates.
7
-
57

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