Subaru LEGACY 2006 Manual page 198

asieps_tobira.book 161 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK CURRENT DATA.
1) Start the engine.
2) Read the data of fuel temperature 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.>
2 CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Remove the access hole lid.
3) Disconnect the connector from fuel pump.
4) Measure the voltage between fuel pump
connector and chassis ground.
Connector & terminal
(R58) No. 2 (+) — Chassis ground (–):
3 CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CONNEC-
TOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between fuel pump
connector and chassis ground.
Connector & terminal
(R58) No. 2 (+) — Chassis ground (–):
4 CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CONNEC-
TOR.
Measure the voltage between fuel pump con-
nector and chassis ground.
Connector & terminal
(R58) No. 2 (+) — Chassis ground (–):
Check
Is the fuel temperature less
than –40°C (–40°F) ?
Is the voltage more than 10 V? Repair the battery
Is the voltage more than 10 V? Repair the battery
Is the voltage more than 4 V?
EN(H4SO)(diag)-161
ENGINE (DIAGNOSTICS)
Yes No
Go to step 2. Repair the poor
contact.
NOTE:
In this case, repair
the following item:
• Poor contact in
fuel pump connec-
tor
• Poor contact in
ECM connector
• Poor contact of
coupling connector
• Poor contact of
joint connector
Go to step 3.
short circuit of har-
ness between
ECM and fuel
pump connector.
Go to step 4.
short circuit of har-
ness between
ECM and fuel
pump connector.
Go to step 5.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and
pump connector
• Poor contact in
fuel pump connec-
tor
• Poor contact in
ECM connector
• Poor contact of
coupling connector
fuel