Subaru Legacy 2002 Service Manual page 1429

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (DIAGNOSTICS)
No.
6 CHECK HARNESS BETWEEN EGR SOLE-
NOID VALVE AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from EGR solenoid
valve and ECM.
3) Measure resistance of harness between
EGR solenoid valve and ECM connector.
Connector & terminal
(B137) No. 25 — (E18) No. 6:
(B137) No. 26 — (E18) No. 1:
(B137) No. 13 — (E18) No. 4:
(B137) No. 14 — (E18) No. 3:
7 CHECK HARNESS BETWEEN EGR SOLE-
NOID VALVE AND ECM CONNECTOR.
Measure resistance of harness between EGR
solenoid valve and chassis ground.
Connector & terminal
(B137) No. 25 — Chassis ground:
(B137) No. 26 — Chassis ground:
(B137) No. 13 — Chassis ground:
(B137) No. 14 — Chassis ground:
8 CHECK POOR CONTACT.
Check poor contact in ECM and EGR sole-
noid valve connector.
Step
Is the resistance less than
1 Ω?
Is the resistance more than
1 MΩ?
Is there poor contact in
ECM and EGR solenoid
valve connector?
EN(H6)-222
Check Yes
Go to step 7.
Go to step 8.
Repair poor con-
tact in ECM and
EGR solenoid
valve connector.
No
Repair open cir-
cuit in harness
between ECM
and EGR solenoid
valve connector.
Repair short cir-
cuit in harness
between main
relay and EGR
solenoid valve
connector.
Even if MIL lights
up, the circuit has
returned to a nor-
mal condition at
this time.