Subaru Impreza 2003 Service Manual page 1374

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK FUEL LEVEL SENSOR.
1)Remove the fuel pump assembly. <Ref. to
FU(H4DOTC)-61, Fuel Pump.>
2)While moving the fuel level sensor float up
and down, make sure that the resistance
between fuel level sensor terminals changes
smoothly.
Terminals
No. 3 — No. 5:
3 CHECK FUEL SUB LEVEL SENSOR.
1)Remove the fuel sub level sensor. <Ref. to
FU(H4DOTC)-64, Fuel Sub Level Sensor.>
2)While moving the 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:
Check
Is any other DTC displayed?
Does the resistance change
smoothly approx. 0.5 Ω — 52
Ω?
Does the resistance change
smoothly approx. 0.5 Ω — 44
Ω?
EN(H4DOTC)-198
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4DOTC)-75,
List of Diagnostic
Trouble Code
(DTC).>
Go to step 3. Replace the fuel
level sensor. <Ref.
to FU(H4DOTC)-
63, Fuel Level
Sensor.>
Repair the poor Replace the fuel
contact in ECM, sub level sensor.
combination meter <Ref. to
and coupling con- FU(H4DOTC)-64,
nectors. Fuel Sub Level
Sensor.>
No