Subaru LEGACY 2003 Service Manual page 15

12 CHECK HARNESS BETWEEN SUB FAN RE-
LAY TERMINAL AND SUB FAN MOTOR
CONNECTOR.
Measure resistance of harness between sub
fan motor connector and sub fan relay termi-
nal.
Connector & terminal
(F16) No. 2 — (F28) No. 20:
Is the measured value less than the specified
valve?
13 CHECK HARNESS BETWEEN SUB FAN RE-
LAY AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance of harness between
sub fan relay connector and ECM connec-
tor.
Connector & terminal
With OBD
(F28) No. 22 — (B134) No. 13:
Without OBD
(F28) No. 22 — (B134) No. 12:
Is the measured value less than the speci-
fied valve?
14 CHECK POOR CONTACT.
Check poor contact in connector between sub
fan and ECM.
Is there poor contact in connector between sub
fan motor and ECM?
NOTE:
Inspection by SUBARU distributor service is required, because probable cause is deterioration of multiple
parts.
RADIATOR SUB FAN SYSTEM
Step Value
1 Ω
1 Ω
There is poor contact.
CO(H4SO)-13
Yes
Go to step 13. Repair open circuit
in harness
between sub fan
motor and sub fan
relay connector.
Go to step 14. Repair open circuit
in harness
between sub fan
relay and ECM.
Repair poor con- Contact with SUB-
tact connector. ARU distributor
service.
COOLING
No