Subaru LEGACY 2006 Manual page 252

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
7 CHECK HARNESS BETWEEN ECM AND
COUPLING CONNECTOR IN REAR WIRING
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness
between ECM and rear wiring harness con-
nector.
Connector & terminal
(B135) No. 32 — (R15) No. 6:
(B135) No. 30 — (R15) No. 4:
8 CHECK FUEL TANK HARNESS.
1) Disconnect the connector from the fuel tank
pressure sensor.
2) Measure the resistance of fuel tank har-
ness.
Connector & terminal
(R213) No. 6 — (R47) No. 2:
9 CHECK FUEL TANK HARNESS.
Measure the resistance of fuel tank harness.
Connector & terminal
(R213) No. 4 — (R47) No. 1:
10 CHECK POOR CONTACT.
Check poor contact in fuel tank pressure sen-
sor connector.
11 CHECK HARNESS BETWEEN ECM AND
FUEL TANK PRESSURE SENSOR CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from fuel tank
pressure sensor.
3) Turn the ignition switch to ON.
4) Read the data of fuel tank pressure sensor
signal using Subaru Select Monitor.
NOTE:
Subaru Select Monitor
For detailed operation procedure, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H4SO)(diag)-26, Subaru Select Moni-
tor.>
Check
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is there poor contact in fuel
tank pressure sensor connec-
tor?
Is the measured value 2.8 kPa
(21.0 mmHg, 0.827 inHg) or
more?
EN(H4SO)(diag)-215
ENGINE (DIAGNOSTICS)
Yes No
Go to step 8. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and rear wir-
ing harness con-
nector
• Poor contact of
coupling connector
Go to step 9. Repair the open
circuit in fuel tank
cord.
Go to step 10.
Repair the open
circuit in fuel tank
cord.
Repair the poor Replace the fuel
contact in fuel tank tank pressure sen-
pressure sensor sor. <Ref. to
connector. EC(H4SO)-11,
Fuel Tank Pres-
sure Sensor.>
Repair battery Replace the fuel
short circuit of har- tank pressure sen-
ness between sor. <Ref. to
ECM and fuel tank EC(H4SO)-11,
pressure sensor Fuel Tank Pres-
connector. sure Sensor.>