Subaru LEGACY 2006 Manual page 242

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
6 CHECK POWER SUPPLY TO DRAIN VALVE.
1) Turn the ignition switch to ON.
2) Measure the voltage between drain valve
and chassis ground.
Connector & terminal
(R143) No. 1 (+) — Chassis ground (–):
7 CHECK POOR CONTACT.
Check poor contact in drain valve connector.
Check
Is the voltage more than 10 V? Go to step 7.
Is there poor contact in drain
valve connector?
EN(H4SO)(diag)-205
ENGINE (DIAGNOSTICS)
Yes No
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
main relay
drain valve
• Poor contact of
coupling connector
• Poor contact of
main relay connec-
tor
Repair poor con- Contact the SOA
tact in drain valve service center.
connector.
and