Subaru LEGACY 2006 Manual page 305

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK HARNESS BETWEEN ECM AND
EGR VALVE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from EGR valve.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
DTC P1493;
(B134) No. 8 (+) — Chassis ground (–):
DTC P1495;
(B134) No. 9 (+) — Chassis ground (–):
DTC P1497;
(B134) No. 10 (+) — Chassis ground (–):
DTC P1499;
(B134) No. 20 (+) — Chassis ground (–):
Check
Is any other DTC displayed?
Is the voltage more than 10 V? Repair the battery
EN(H4SO)(diag)-268
Yes No
Check DTC using Go to step 2.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO)(diag)-
70, List of Diag-
nostic Trouble
Code (DTC).>
Replace the ECM.
short in harness <Ref. to
between ECM and FU(H4SO)-36,
EGR valve con- Engine Control
nector. After Module (ECM).>
repair, replace the
ECM. <Ref. to
FU(H4SO)-36,
Engine Control
Module (ECM).>