Subaru Impreza 2003 Service Manual page 3065

6. CHECK FUEL LEVEL SENSOR
Step
1 CHECK ENGINE TYPE.
2 CHECK FUEL LEVEL SENSOR.
1)Remove the fuel level sensor. <Ref. to
FU(H4DOTC)-63, REMOVAL, Fuel Level Sen-
sor.>
2)Measure the resistance between fuel level
sensor terminals when setting the float to
FULL and EMPTY position.
Terminals
No. 3 — No. 5:
3 CHECK FUEL SUB LEVEL SENSOR.
1)Remove the fuel sub level sensor. <Ref. to
FU(H4DOTC)-64, REMOVAL, Fuel Sub Level
Sensor.>
2)Measure the resistance between fuel sub
level sensor terminals when setting the float to
FULL and EMPTY position.
Terminals
No. 1 — No. 2:
4 CHECK HARNESS BETWEEN FUEL SUB
LEVEL SENSOR AND COMBINATION
METER.
1)Disconnect the connector from combination
meter.
2)Measure the resistance between fuel sub
level sensor harness connector terminal and
combination meter harness connector termi-
nal.
Connector & terminal
(R59) No. 1 — (i12) No. 2:
5 CHECK HARNESS BETWEEN FUEL LEVEL
SENSOR AND FUEL SUB LEVEL SENSOR.
Measure the resistance between fuel level
sensor harness connector terminal and fuel
sub level sensor harness connector terminal.
Connector & terminal
(R58) No. 3 — (R59) No.2:
6 CHECK FUEL LEVEL SENSOR GROUND
CIRCUIT.
Measure the resistance between fuel level
sensor harness connector terminal and chas-
sis ground.
Connector & terminal
(R58) No. 5 — Chassis ground:
7 CHECK FUEL LEVEL SENSOR.
1)Remove the fuel level sensor. <Ref. to
FU(H4SO)-61, REMOVAL, Fuel Level Sen-
sor.> or <Ref. to FU(H4SOw/oOBD)-57,
REMOVAL, Fuel Level Sensor.>
2)Measure the resistance between fuel level
sensor terminals when setting the float to
FULL and EMPTY position.
Terminals
No. 3 — No. 5:
COMBINATION METER SYSTEM
Is the displacement 2.5 L or is
the engine equipped with tur-
bocharger?
Is the resistance 0.5 to 2.5 Ω
(FULL) and 50 to 52 Ω
(EMPTY)?
Is the resistance 0.5 to 2.5 Ω
(FULL) and 42 to 44 Ω
(EMPTY)?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
Is the resistance 2 to 5 Ω
(FULL) and 92 to 95 Ω
(EMPTY)?
IDI-9
INSTRUMENTATION/DRIVER INFO
Check
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Check the fuel
gauge. <Ref. to
IDI-20,
REMOVAL, Fuel
Gauge.>
Go to step 8.
Yes No
Go to step 7.
Replace the fuel
level sensor.
Replace the fuel
sub level sensor.
Repair the wiring
harness.
Repair the wiring
harness.
Repair the wiring
harness.
Replace the fuel
level sensor.