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13. FUEL INJECTION SYSTEM Downtown 300i ABS
FUEL PUMP
INSPECTIION Full Position
Put the side stand up and the engine stop
switch is at "RUN"
Disconnect the fuel pump/fuel unit
connector.
Connect the multimeter (+) probe to the
Red/Black terminal and the multi-meter (-)
probe to the Green terminal.
Turn the ignition switch to "ON" and Green
measure the voltage between the terminals.
It should be shown the current battery
voltage for a few seconds.
Yellow/White
If there is still battery voltage, replace the
fuel pump.
If there is not any battery voltage, inspect
the following:
Fuse B (10 A)
Fuel cut-off relay
ECU
Measure the resistance between the Empty Position
Red/Black and Green terminals of the fuel
pump side connector.
Standard (at 20°C/68°F): 1.90.3
Fuel level sensor inspection
Measure the resistance between the
Yellow/White and Green terminals of the
fuel pump side connector.
Standard (at 20°C/68°F):
Float at full position 110033
Float at empty position 1003
13-14