Subaru Legacy 2003 Service Manual page 612

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
2 CHECK FUEL LEVEL SENSOR.
Warning:
During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.
1) Remove fuel pump assembly. <Ref. to
FU(H4SO)-62, Fuel Pump.>
2) While moving fuel level sensor float up and
down, make sure that the resistance
between fuel level sensor terminals
changes smoothly.
Terminals
No. 3 — No. 6:
Does the resistance change smoothly?
3 CHECK FUEL SUB LEVEL SENSOR.
Warning:
During work procedures, if fuel tank is more
than 3/4 full, be careful because fuel may
spill.
1) Remove fuel sub level sensor. <Ref. to
FU(H4SO)-65, Fuel Sub Level Sensor.>
2) While moving fuel sub level sensor float up
and down, make sure that the resistance
between fuel level sensor terminals
changes smoothly.
Terminals
No. 1 — No. 2:
Does the resistance change smoothly?
Value
DTC indicated.
Change smoothly.
Change smoothly.
EN(H4SO)-215
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO)-83, List
of Diagnostic
Trouble Code
(DTC).>
Go to step 3. Replace fuel level
sensor. <Ref. to
FU(H4SO)-64,
Fuel Level Sen-
sor.>
Repair poor con- Replace fuel sub
tact in ECM, com- level sensor.
bination meter and <Ref. to
coupling connec- FU(H4SO)-65,
tors. Fuel Sub Level
Sensor.>
No