Subaru LEGACY 2006 Manual page 232

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
6 CHECK HARNESS BETWEEN EGR VALVE
AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from EGR valve
and ECM.
3) Measure the resistance of harness
between EGR valve and ECM connector.
Connector & terminal:
(B134) No. 10 — (E18) No. 4:
(B134) No. 9 — (E18) No. 1:
(B134) No. 8 — (E18) No. 3:
(B134) No. 20 — (E18) No. 6:
7 CHECK HARNESS BETWEEN EGR VALVE
AND ECM CONNECTOR.
Measure the resistance of harness between
EGR valve and chassis ground.
Connector & terminal:
(B134) No. 10 — Chassis ground:
(B134) No. 9 — Chassis ground:
(B134) No. 8 — Chassis ground:
(B134) No. 20 — Chassis ground:
8 CHECK POOR CONTACT.
Check poor contact of ECM and EGR valve
connectors.
Check
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is there poor contact in ECM
and EGR valve connector?
EN(H4SO)(diag)-195
ENGINE (DIAGNOSTICS)
Yes No
Go to step 7. Repair the open
circuit of harness
between ECM and
EGR valve con-
nector. <Ref. to
FU(H4SO)-26,
EGR Valve.>
Go to step 8. Repair the short
circuit of harness
between main
relay and EGR
valve connector.
Repair the poor Even if the mal-
contact of ECM function indicator
and EGR valve light illuminates,
connectors. the circuit has
returned to the
specified condi-
tion at this time.