Subaru LEGACY 2006 Manual page 92

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Step
6 CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse No. 22.
3) Check the condition of fuse.
7 SUB FAN RELAY INSPECTION.
1) Turn the ignition switch to OFF.
2) Measure the resistance between sub fan
relay terminals.
Terminal
No. 20 — No. 21:
8 SUB FAN RELAY INSPECTION.
1) Connect the battery to terminals No. 22 and
No. 23 of the sub fan relay.
2) Measure the resistance between sub fan
relay terminals.
Terminal
No. 20 — No. 21:
9 CHECK HARNESS BETWEEN SUB FAN RE-
LAY TERMINAL AND SUB FAN MOTOR
CONNECTOR.
1) Disconnect the connector from the sub fan
motor.
2) Measure the resistance of harness
between the sub fan relay terminal and sub fan
motor connector.
Connector & terminal
(F16) No. 2 — (F27) No. 21:
10 CHECK HARNESS BETWEEN THE SUB MO-
TOR CONNECTOR AND MAIN FAN RELAY 2
CONNECTOR.
1) Remove the main fan relay 2 from A/C relay
holder.
2) Measure the resistance of harness
between sub fan motor connector and main fan
relay 2 connector.
Connector & terminal
(F16) No. 1 — (F27) No. 5:
11 CHECK POOR CONTACT.
Check for poor contact of sub fan motor con-
nector.
12 CHECK SUB FAN MOTOR.
Connect the battery positive (+) terminal to ter-
minal No. 2 of the sub fan motor, and the
ground (–) terminal to terminal No. 1.
13 CHECK MAIN FAN RELAY 2.
Measure the resistance of main fan relay 2.
Terminal
No. 2 — No. 5:
14 CHECK HARNESS BETWEEN MAIN FAN
RELAY 2 TERMINAL AND MAIN FAN MO-
TOR CONNECTOR.
1) Disconnect the connector from the main fan
motor.
2) Measure the resistance of the harness
between main fan relay 2 terminal and main
fan motor connector.
Connector & terminal
(F17) No. 2 — (F27) No. 2:
Radiator Fan System
Check
Is the fuse blown out?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is there poor contact in the sub
fan motor connector?
Does the sub fan rotate?
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
CO(H4SO)-9
COOLING
Yes No
Replace the fuse. Repair the power
supply line.
Go to step 8. Replace the sub
fan relay.
Go to step 9. Replace the sub
fan relay.
Go to step 10. Repair the open
circuit of harness
between sub fan
relay terminal and
sub fan motor con-
nector.
Go to step 11.
Repair the open
circuit of the har-
ness between sub
fan motor connec-
tor and main fan
relay 2 connector.
Repair the poor Go to step 12.
contact of sub fan
motor connector.
Go to step 13. Replace the sub
fan motor.
Go to step 14. Replace the main
fan relay 2.
Go to step 15. Repair the open
circuit of the har-
ness between
main fan relay 2
terminal and main
fan motor connec-
tor.