Subaru Legacy 2002 Service Manual page 1121

Cooling
No.
8 CHECK POWER SUPPLY TO MAIN FAN
RELAY 2.
1) Turn ignition switch to OFF.
2) Remove main fan relay 2 from A/C relay
holder.
3) Measure voltage between main fan relay 2
terminal and chassis ground.
Connector & terminal
(F30) No. 18 (+) — Chassis ground (−):
9 CHECK POWER SUPPLY TO MAIN FAN
RELAY 2.
1) Turn ignition switch to ON.
2) Measure voltage between main fan relay 2
terminal and chassis ground.
Connector & terminal
(F30) No. 20 (+) — 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. 1 (+) — Chassis ground (−):
12 CHECK FUSE.
1) Turn ignition switch to OFF.
2) Remove fuse No. 18 from joint box.
3) Check condition of fuse.
13 CHECK MAIN FAN RELAY 2.
1) Turn ignition switch to OFF.
2) Remove main fan relay 2.
3) Measure resistance of main fan relay 2.
Terminal
No. 17 — No. 18:
14 CHECK MAIN FAN RELAY 2.
1) Connect battery to terminals No. 19 and
No. 20 of main fan relay 2.
2) Measure resistance of main fan relay 2.
Terminal
No. 17 — No. 18:
15 CHECK HARNESS BETWEEN MAIN FAN
RELAY 2 TERMINAL AND MAIN FAN
MOTOR CONNECTOR.
Measure resistance of harness between main
fan motor connector and main fan relay 2 ter-
minal.
Connector & terminal
(F17) No. 2 — (F30) No. 17:
RADIATOR MAIN 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)-8
Check Yes
Go to step 9.
Go to step 13.
Replace fuse.
Repair open cir-
cuit in harness
between 30 A
fuse and main 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 main fan
relay 2 and igni-
tion switch.
Replace main fan
relay 2.
Replace main fan
relay 2.
Repair open cir-
cuit in harness
between main fan
motor connector
and main fan
relay 2 terminal.