Subaru Legacy 2003 Service Manual page 605

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
6 CHECK HARNESS BETWEEN ECM AND
COMBINATION METER.
Measure resistance between ECM and combi-
nation meter connector.
Connector & terminal
(B136) No. 27 — (i10) No. 3:
Is the measured value less than the specified
value?
7 CHECK FUEL TANK CORD.
1) Turn ignition switch to OFF.
2) Disconnect connector from fuel sub level
sensor.
3) Measure resistance between fuel sub level
sensor and chassis ground.
Connector & terminal
(R59) No. 1 — Chassis ground:
Does the measured value exceed the spec-
ified value?
8 CHECK FUEL TANK CORD.
1) Disconnect connector from fuel pump
assembly.
2) Measure resistance between fuel pump
assembly and chassis ground.
Connector & terminal
(R59) No. 2 — Chassis ground:
Does the measured value exceed the spec-
ified value?
9 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) Measure resistance between fuel level sen-
sor and terminals with its float set to the full
position.
Terminals
No. 3 — No. 6:
Is the measured value within the specified
range?
10 CHECK FUEL SUB LEVLE 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) Measure resistance between fuel sub level
sensor and terminals with its float set to the
full position.
Terminals
No. 1 — No. 2:
Is the measured value within the specified
range?
Step
EN(H4SO)-208
Value
10 Ω
1 MΩ
1 MΩ
0.5 - 2.5 Ω
0.5 - 2.5 Ω
Yes
Repair or replace Repair open circuit
combination between ECM and
meter. <Ref. to combination meter
IDI-4, Combina- connector.
tion Meter Sys-
NOTE:
tem.>
In this case, repair
the following:
Poor contact in
coupling connector
Go to step 8. Repair ground
short circuit in fuel
tank cord.
Go to step 9. Repair ground
short circuit in fuel
tank cord.
Go to step 10. Replace fuel level
sensor.
Repair poor con- Replace fuel sub
tact in harness level sensor.
between ECM and
combination meter
connector.
No