5.FUEL SYSTEM
5-
FUEL PUMP
Fuel pump electrical test.
When turning ignition key ON, the fuel pump should run for 5 seconds to build up the fuel
pressure in the system.
If the pump does not work, disconnect the connector from the fuel pump.
Install a temporary connector to the fuel pump connector. Apply 12V to this test harness.
CAUTION
If pump does not run, replace a new pump.
Other wise, check fuse and if good, probe terminals of fuel pump connector on vehicle harness
or its connector, Repair or replace appropriate part.
Fuel pump removal
Remove fuel pump outlet hose and harness.
Remove fuel pump retaining screws.
Gently push pump up.
CAUTION
Fuel pump installation
For installation, reverse the removal process but
pay attention to the following.
Install a new gasket.
Pay attention to pump orientation.
Tighten retaining screws as per illustrated sequence.
Install hose properly on OUT nipples and harness.
FUEL SENSOR
The level sensor is part of the fuel pump module mounted inside the fuel tank.
Inspection
Dismantle the fuel pump module mounted inside the fuel tank (refer to above steps)
Turn on ignition switch
Use hands to shake fuel sensor's floating device, locating floating device to see whether it is
fit with indication of fuel meter.
Turn off the ignition switch and disconnect connector, measure resistance:
Lower: BLUE/WHITE: 6-9Ω
Lift: BLUE/WHITE: 90-95Ω
If the resistance is not within empty and full values, replace fuel pump module. If the fuel level
sensor is good, try a new multifunction gauge.
Running the fuel pump a few minutes with reverse polarity can damage the pump.
While pulling out the fuel pump, pay attention to fuel sensor float arm. Float arm can get
stuck and bend which can reduce the fuel sensor capabilities.
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