Subaru 2009 IMPREZA Service Manual page 3078

INSTRUMENTATION/DRIVER INFO
6. CHECK FUEL LEVEL SENSOR
Step
1 CHECK COMBINATION METER.
1) Drain fuel.
2) Check the indication status of the fuel gauge
in the combination meter.
2 CHECK COMBINATION METER.
Perform the self-diagnosis of combination
meter. <Ref. to IDI-4, SELF-DIAGNOSIS,
INSPECTION, Combination Meter System.>
3 CHECK COMMUNICATION STATUS.
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF)
and run the "PC application for Subaru Select
Monitor".
3) On «System Selection Menu» display,
select {Integ. unit mode}.
4) Select the {Diagnostic Code(s) Display}.
4 CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor.
2) Measure the resistance between the body
integrated unit and chassis ground.
Connector & terminal
(B281) No. 7 — Chassis ground:
5 CHECK COMMUNICATION BETWEEN
BODY INTEGRATED UNIT AND METERS.
1) Remove the fuel sub level sensor. <Ref. to
FU(H4SO)-67, REMOVAL, Fuel Sub Level Sen-
sor.> <Ref. to FU(H4DOTC)-76, REMOVAL,
Fuel Sub Level Sensor.>
2) Short the fuel sub level sensor connector
terminal to the chassis ground with approx. 100
resistance.
3) Turn the ignition switch to ON.
Connector & terminal
(R59) No. 1 — Chassis ground:
6 CHECK BODY INTEGRATED UNIT.
1) Retain the condition in step 5.
2) On {Integ. unit mode}, select {Fuel level
resistance} using the Subaru Select Monitor.
7 CHECK COMMUNICATION BETWEEN
BODY INTEGRATED UNIT AND METERS.
1) Remove the fuel sub level sensor. <Ref. to
FU(H4SO)-67, REMOVAL, Fuel Sub Level Sen-
sor.> <Ref. to FU(H4DOTC)-76, REMOVAL,
Fuel Sub Level Sensor.>
2) Short the fuel sub level sensor connector
terminal to the chassis ground with approx. 2
to 6 resistance.
3) Turn the ignition switch to ON.
Connector & terminal
(R59) No. 1 — Chassis ground:
8 CHECK BODY INTEGRATED UNIT.
1) Retain the condition in step 7.
2) On {Integ. unit mode}, select {Fuel level
resistance} using the Subaru Select Monitor.
Combination Meter System
Does the fuel gauge needle
indicate EMPTY and is the low
fuel warning light blinking?
Is it operating normally?
Is DTC being displayed?
Is the resistance 2 — 96 ?
Does the meter needle indicate
EMPTY?
Is approx. 100
the data?
Does the meter needle indicate
FULL?
Is the resistance approximately
2 to 6 ?
IDI-8
Check Yes
Go to step 4.
Go to step 3.
Perform the diag-
nosis according to
DTC. <Ref. to
LAN(diag)-35,
LIST, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 5.
If the step 1 is
"Yes", Go to step 9.
Go to step 7.
displayed in Go to step 11.
Go to step 9.
Go to step 11.
No
Go to step 2.
Replace the meter
case assembly.
Go to step 4.
Repair the wiring
harness.
Go to step 6.
Replace the body
integrated unit.
<Ref. to SL-50,
REMOVAL, Body
Integrated Unit.>
Go to step 8.
Replace the body
integrated unit.
<Ref. to SL-50,
REMOVAL, Body
Integrated Unit.>