Subaru 2004 LEGACY Service Manual page 158

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK HARNESS BETWEEN ECM AND
EGR SOLENOID VALVE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from EGR sole-
noid 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. 11 (+) — Chassis
−
ground ( ):
DTC P1495; (B134) No. 10 (+) — Chassis
−
ground ( ):
DTC P1497; (B134) No. 9 (+) — Chassis
−
ground ( ):
DTC P1499; (B134) No. 8 (+) — Chassis
−
ground ( ):
Check
Is any other DTC displayed?
Is the voltage more than 10 V? Repair battery
EN(H6DO)(diag)-227
ENGINE (DIAGNOSTICS)
Yes
Inspect the DTC Go to step 2.
using "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
Code (DTC).>
Replace the ECM.
short in harness <Ref. to
between ECM and FU(H6DO)-34,
EGR solenoid Engine Control
valve connector. Module (ECM).>
After repair,
replace the ECM.
<Ref. to
FU(H6DO)-34,
Engine Control
Module (ECM).>
No