Subaru IMPREZA GD 2007 Series Manual page 327

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
7 CHECK FUEL TANK CORD.
1) Disconnect the connector from the fuel level
sensor.
2) Measure the resistance between the fuel
level sensor and coupling connector.
Connector & terminal
(R57) No. 11 — (R58) No. 2:
8 CHECK FUEL TANK CORD.
1) Disconnect the connector from the fuel sub
level sensor.
2) Measure the resistance between the fuel
level sensor and fuel sub level sensor.
Connector & terminal
(R58) No. 3 — (R59) No. 2:
9 CHECK FUEL TANK CORD.
Measure the resistance between the fuel sub
level sensor and coupling connector.
Connector & terminal
(R57) No. 7 — (R59) No. 1:
10 CHECK FUEL LEVEL SENSOR.
1) Remove the fuel pump assembly. <Ref. to
FU(H4SO)-51, Fuel Pump.>
2) Measure the resistance between fuel level
sensor terminals moving the fuel level sensor
float up and down.
Terminals
No. 3 — No. 2:
11 CHECK FUEL SUB LEVEL SENSOR.
1) Remove the fuel sub level sensor. <Ref. to
FU(H4SO)-54, Fuel Sub Level Sensor.>
2) Measure the resistance between fuel sub
level sensor terminals moving the fuel sub level
sensor float up and down.
Terminals
No. 1 — No. 2:
Check
Is the resistance less than 1 Ω? Go to step 8.
Is the resistance less than 1 Ω? Go to step 9.
Is the resistance less than 1 Ω? Go to step 10.
Is the resistance between 0.5
— 52 Ω?
Is the resistance between 0.5
— 44 Ω?
EN(H4SO)(diag)-218
Yes No
Repair the open
circuit between the
coupling connector
and fuel level sen-
sor.
Repair the open
circuit between the
fuel level sensor
and fuel sub level
sensor.
Repair the open
circuit of harness
between the cou-
pling connector
and fuel sub level
sensor.
Go to step 11.
Replace the fuel
level sensor. <Ref.
to FU(H4SO)-53,
Fuel Level Sen-
sor.>
Replace the fuel Check the combi-
sub level sensor. nation meter. <Ref.
<Ref. to to IDI-11, Combi-
FU(H4SO)-54, nation Meter.>
Fuel Sub Level
Sensor.>