(Yaw Rate (B380) No - Subaru IMPREZA GD 2007 Series Manual

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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 main fan does not rotate under the above conditions.
• Radiator main 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) Warm-up the engine. (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 MAIN 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 main 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 main fan
motor connector and chassis ground.
Connector & terminal
(F17) No. 1 (+) — Chassis ground (–):
4 CHECK GROUND CIRCUIT OF MAIN FAN
MOTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between main fan
motor connector and chassis ground.
Connector & terminal
(F17) No. 3 — Chassis ground:
(F17) No. 4 — Chassis ground:
5 CHECK POOR CONTACT.
Check poor contact of main fan motor connec-
tor.
6 CHECK MAIN 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 main fan motor
connector.
Radiator Main Fan System
Check
Does the radiator main fan
rotate?
Does the radiator main 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
main fan motor connector?
Does the main fan rotate?
CO(H4SO)-7
COOLING
Yes No
Go to step 2. Go to step 3.
Go to step 17.
Radiator main fan
system is normal.
Go to step 4. Go to step 7.
Repair the open
circuit of the har-
ness between
main fan motor
connector and
chassis ground.
Go to step 6.
Repair the poor
contact of main fan
motor connector.
Repair the poor Replace the main
contact of main fan fan motor with a
motor connector. new part.