(B380) No - Subaru IMPREZA GD 2007 Series Manual

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COOLING
B: INSPECTION
DETECTING CONDITION:
• Engine coolant temperature is 96°C (205°F) or more.
• A/C compressor is rotating.
• Vehicle speed is 19 km/h (12 MPH) or less.
TROUBLE SYMPTOMS:
• Radiator sub fan does not rotate under the above conditions.
• Radiator sub fan does not rotate at high speed when the following conditions are met at the same time.
1. Engine coolant temperature is 90°C (194°F) or more.
2. A/C is ON.
Step
1 CHECK RADIATOR OPERATION.
1) Run the engine at idle. (When vehicle is
parked)
2) Turn the A/C switch to OFF.
3) Raise the engine coolant temperature to
96°C (205°F) or above.
2 CHECK RADIATOR OPERATION.
Turn the A/C switch to ON under the condition of
step 1.
3 CHECK POWER SUPPLY TO SUB FAN MO-
TOR.
CAUTION:
Be careful not to overheat the engine during
repair.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the sub fan
motor.
3) Start and warm up the engine until engine
coolant temperature raises to 96°C (205°F) or
above.
4) Stop the engine, and turn the ignition switch
to ON.
5) Measure the voltage between sub fan motor
connector and chassis ground.
Connector & terminal
(F16) No. 1 (+) — Chassis ground (–):
4 CHECK GROUND CIRCUIT OF SUB FAN
MOTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between the sub
fan motor connector and chassis ground.
Connector & terminal
(F16) No. 3 — Chassis ground:
(F16) No. 4 — Chassis ground:
5 CHECK POOR CONTACT.
Check for poor contact of sub fan motor connec-
tor.
6 CHECK SUB FAN MOTOR.
Connect the battery positive (+) terminal to ter-
minal No. 1, and the ground (–) terminal to ter-
minal No. 3 or 4 of the sub fan motor connector.
Radiator Sub Fan System
Check
Does the radiator sub fan
rotate?
Does the radiator sub fan rotate
at high speed when the A/C
compressor is operating?
Is the voltage 10 V or more?
Is the resistance less than 5 Ω? Go to step 5.
Is there poor contact in the sub
fan motor connector?
Does the sub fan rotate?
CO(H4SO)-12
Yes No
Go to step 2. Go to step 3.
Go to step 17.
Radiator sub fan
system is normal.
Go to step 4. Go to step 7.
Repair the open
circuit of harness
between sub fan
motor connector
and chassis
ground.
Go to step 6.
Repair the poor
contact of sub fan
motor connector.
Repair the poor Replace the sub
contact of sub fan fan motor with a
motor connector. new part.