Subaru IMPREZA 2002 Service Manual page 546

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
r
CHECK FUEL TANK CORD.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from fuel sub level
sensor.
3)Measure the resistance between fuel sub
level sensor and chassis ground.
Connector & terminal
(R59) No. 1
-
Chassis ground:
I
CHECK FUEL TANK CORD.
1)Disconnect the connector from fuel pump
assembly.
2)Measure the resistance between fuel pump
assembly and chassis ground.
Connector & terminal
(R59) No. 2
-
Chassis ground:
1
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 the fuel pump assembly. <Ref. to
PU(S0HC)-59, Fuel Pump.>
2)Measure the resistance between fuel level
sensor and terminals with its float set to the full
position.
Terminals
NO.
3
-
NO.
2:
IO
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 the fuel sub level sensor. <Ref. to
FU(SOHC)S3, Fuel Sub Level Sensor.>
2)Measure the resistance between fuel sub
level sensor and terminals with its float set to
the full position.
Terminals
NO. 1 -NO. 2:
Check
Is the resistance more than 1
MR?
Is the resistance more than 1
Ma?
Is the resistance between 0.5
and 2.5 R?
Is the resistance between 0.5
and 2.5 R?
Yes
So to step 8.
So to step 9.
So to step 10.
3epair poor con-
act in harness
between ECM and
:ombination meter
:onnector.
No
3epair ground
;hort circuit in fuel
ank cord.
3epair ground
;hort circuit in fuel
ank cord.
3eplace the fuel
eve1 sensor.
3eplace the fuel
;ub level sensor.
EN(S0HC)-222