Subaru Legacy 2002 Service Manual page 1127

Cooling
No.
8 CHECK POWER SUPPLY TO SUB FAN
RELAY 2.
1) Turn ignition switch to OFF.
2) Remove sub fan relay 2 from A/C relay
holder.
3) Measure voltage between sub fan relay 2
terminal and chassis ground.
Connector & terminal
(F29) No. 26 (+) — Chassis ground (−):
9 CHECK POWER SUPPLY TO SUB FAN
RELAY 2.
1) Turn ignition switch to ON.
2) Measure voltage between sub fan relay 2
terminal and chassis ground.
Connector & terminal
(F29) No. 28 (+) — Chassis ground (−):
10 CHECK 30 A FUSE.
1) Remove 30 A fuse from A/C relay holder.
2) Check condition of fuse.
11 CHECK POWER SUPPLY TO A/C RELAY
HOLDER 30 A FUSE TERMINAL.
Measure voltage of harness between A/C
relay holder 30 A fuse terminal and chassis
ground.
Connector & terminal
(F27) No. 3 (+) — Chassis ground (−):
12 CHECK FUSE.
1) Turn ignition switch to OFF.
2) Remove fuse No. 17 from joint box.
3) Check condition of fuse.
13 CHECK SUB FAN RELAY 2.
1) Turn ignition switch to OFF.
2) Remove sub fan relay 2.
3) Measure resistance of sub fan relay 2.
Terminal
No. 25 — No. 26:
14 CHECK SUB FAN RELAY 2.
1) Connect battery to terminals No. 27 and
No. 28 of sub fan relay 2.
2) Measure resistance of sub fan relay 2.
Terminal
No. 25 — No. 26:
15 CHECK HARNESS BETWEEN SUB FAN
RELAY 2 TERMINAL AND SUB FAN
MOTOR CONNECTOR.
Measure resistance of harness between sub
fan motor connector and sub fan relay 2 ter-
minal.
Connector & terminal
(F16) No. 2 — (F29) No. 25:
RADIATOR SUB FAN SYSTEM
Step
Is the voltage more than 10
V?
Is the voltage more than 10
V?
Is the fuse blown-out?
Is the voltage more than 10
V?
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?
CO(H6)-14
Check Yes
Go to step 9.
Go to step 13.
Replace fuse.
Repair open cir-
cuit in harness
between 30 A
fuse and sub fan
relay 2 terminal.
Replace fuse.
Go to step 14.
Go to step 15.
Go to step 16.
No
Go to step 10.
Go to step 12.
Go to step 11.
Repair open cir-
cuit in harness
between main
fuse box connec-
tor and 30 A fuse
terminal.
Repair open cir-
cuit in harness
between sub fan
relay 2 and igni-
tion switch.
Replace sub fan
relay 2.
Replace sub fan
relay 2.
Repair open cir-
cuit in harness
between sub fan
motor connector
and sub fan relay
2 terminal.