Subaru LEGACY 2003 Service Manual page 11

13 CHECK HARNESS BETWEEN MAIN FAN
RELAY AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance of harness between
main fan relay connector and ECM connec-
tor.
Connector & terminal
With OBD
(F66) No. 7 — (B134) No. 14:
Without OBD
(F66) No. 7 — (B134) No. 3:
Is the measured value less than the speci-
fied valve?
14 CHECK POOR CONTACT.
Check poor contact in connector between main
fan and ECM.
Is there poor contact in connector between
main fan motor and ECM?
NOTE:
Inspection by SUBARU distributor service is required, because probable cause is deterioration of multiple
parts.
RADIATOR MAIN FAN SYSTEM
Step Value
1 Ω
There is poor contact.
CO(H4SO)-9
Yes
Go to step 14. Repair open circuit
in harness
between main fan
relay and ECM.
Repair poor con- Contact with SUB-
tact connector. ARU distributor
service.
COOLING
No