Subaru Forester Engine Cooling System 1999 2000 (3) PDF

3. Radiator Sub Fan (With A/C
model only)
A: OPERATION
DETECTING CONDITION:
Condition (1):
Engine coolant temperature is below 95C
(203F).
A/C switch is turned ON.
Vehicle speed is below 19 km/h (12 MPH).
Condition (2):
Engine coolant temperature is above 100C
(212F).
A/C switch is turned OFF.
Vehicle speed is below 19 km/h (12 MPH).
TROUBLE SYMPTOM:
Radiator sub fan does not rotate under condi-
tions (1) and (2) above.
3A1 : CHECK POWER SUPPLY TO SUB
FAN MOTOR.
CAUTION:
Be careful not to overheat engine during repair.
1) Turn ignition switch to OFF.
2) Disconnect connector from sub fan motor and
main fan motor.
3) Start the engine, and warm it up until engine
coolant temperature increases over 100C
(212F).
4) Stop the engine and turn ignition switch to ON.
5) Measure voltage between sub fan motor con-
nector and chassis ground.
Connector & terminal
(F16) No. 2 (+) ? Chassis ground (?):
H2M1714A
:
Is the voltage more than 10 V?
: Go to step 3A2.
: Go to step 3A5.
3A2 : CHECK GROUND CIRCUIT OF SUB
FAN MOTOR.
1) Turn ignition switch to OFF.
2) Measure resistance between sub fan motor
connector and chassis ground.
Connector & terminal
(F16) No. 1 ? Chassis ground:
H2M1715A
:
Is the resistance less than 5
?
?
: Go to step 3A3.
: Repair open circuit in harness between
sub fan motor connector and chassis
ground.
3A3 : CHECK POOR CONTACT.
Check poor contact in sub fan motor connector.
<Ref. to FOREWORD [W3C1].>
:
Is there poor contact in sub fan motor
connector?
: Repair poor contact in sub fan motor
connector.
: Go to step 3A4.
7
[T3A3] 2-5DIAGNOSTICS
3. Radiator Sub Fan (With A/C model only)

Summary of Content

3. Radiator Sub Fan (With A/Cmodel only)A: OPERATIONDETECTING CONDITION:Condition (1): Engine coolant temperature is below 95C(203F). A/C switch is turned ON. Vehicle speed is below 19 km/h (12 MPH).Condition (2): Engine coolant temperature is above 100C(212F). A/C switch is turned OFF. Vehicle speed is below 19 km/h (12 MPH).TROUBLE SYMPTOM: Radiator sub fan does not rotate under condi-tions (1) and (2) above.3A1 : CHECK POWER SUPPLY TO SUBFAN MOTOR.CAUTION:Be careful not to overheat engine during repair.1) Turn ignition switch to OFF.2) Disconnect connector from sub fan motor andmain fan motor.3) Start the engine, and warm it up until enginecoolant temperature increases over 100C(212F).4) Stop the engine and turn ignition switch to ON.5) Measure voltage between sub fan motor con-nector and chassis ground.Connector terminal(F16) No. 2 (+) Chassis ground ():H2M1714A:Is the voltage more than 10 V?: Go to step 3A2.: Go to step 3A5.3A2 : CHECK GROUND CIRCUIT OF SUBFAN MOTOR.1) Turn ignition switch to OFF.2) Measure resistance between sub fan motorconnector and chassis ground.Connector terminal(F16) No. 1 Chassis ground:H2M1715A:Is the resistance less than 5?: Go to step 3A3.: Repair open circuit in harness betweensub fan motor connector and chassisground.3A3 : CHECK POOR CONTACT.Check poor contact in sub fan motor connector.Ref. to FOREWORD [W3C1].:Is there poor contact in sub fan motorconnector?: Repair poor contact in sub fan motorconnector.: Go to step 3A4.7[T3A3] 2-5DIAGNOSTICS3. Radiator Sub Fan (With A/C model only)