Subaru IMPREZA 2002 Service Manual page 230

RADIATOR SUB FAN SYSTEM
COOLING
Step
25 CHECK SUB FAN RELAY2.
2)Remove the sub fan relay2.
3)Measure the resistance of sub fan relay2.
1)Turn the ignition switch to OFF.
Terminal
NO. 18-N0. 17:
26 CHECK MAIN FAN RELAY2.
1)Connect the battery to terminals No. 19 and
No. 20 of sub fan relay2.
2)Measure the resistance of sub fan relay2.
Terminal
NO. 18
-
NO. 17:
27 CHECK HARNESS BETWEEN SUB FAN
RELAY2 TERMINAL AND SUB FAN MOTOR
CONNECTOR.
Measure the resistance of harness between
sub fan motor connector and sub fan relay2
terminal.
Connector & terminal
(F16) NO. 2
-
(F29) NO. 17:
28
CHECK HARNESS BETWEEN SUB FAN
*RELAY2 AND ECM.
1)Turn the ignition switch to
OFF.
2)Disconnect the connector from ECM.
3)Measure the resistance of harness between
sub fan relay2 connector and ECM connector.
Connector & terminal
(F29) NO. 19
-
(8137) NO. 28:
29 CHECK POOR CONTACT.
Check the poor contact in connector between
sub fan and ECM.
Check
Is the resistance more than 1
MR?
Is the resistance less than 1
Q?
Is the resistance less than 1
ZZ?
Is the resistance less than
1
n?
I s
there poor contact in con-
nector between sub fan motor
and ECM?
Yes
So to step 26.
30 to step 27.
30 to step 28.
30 to step 29.
3epair the poor
:ontact connector.
No
Replace the sub
fan relay2.
Replace the sub
fan relay2.
Repair the open
circuit in harness
between sub fan
motor connector
and sub fan relay2
terminal.
Repair the open
circuit in harness
between sub fan
relay2 and ECM.
Contact with SOA
service.
NOTE:
Inspection by SOA service is required, because
probable cause is deterioration of multiple parts.
CO-24