Legacy GT LTD Sedan AWD F4-2.5L DOHC (1998)
Radiator Cooling Fan Motor: Testing and Inspection
Radiator Main Fan LO Mode with AC
B: LO MODE OPERATION (WITH A/C MODEL)
DETECTING CONDITION:
Condition (1):
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Engine coolant temperature is below 89°C (192°F).
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A/C switch is turned ON.
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Vehicle speed is below 10 km/h (6 MPH).
Condition (2):
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Engine coolant temperature is above 95°C (203° F).
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A/C switch is turned OFF.
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Vehicle speed is below 10 km/h (6 MPH).
TROUBLE SYMPTOM:
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Radiator main fan does not rotate at LO speed under conditions (1) and (2) above.
1B1 : CHECK POWER SUPPLY TO MAIN FAN MOTOR.
CAUTION: Be careful not to overheat engine during repair.
1) Turn ignition switch to OFF.
2) Disconnect connector from main fan motor.
3) Start the engine, and warm-up it until engine coolant temperature increases over 95°C (203°F).
4) Stop the engine and turn ignition switch to ON.
5) Turn A/C switch to OFF.
6) Measure voltage between main fan motor connector and chassis ground.
Connector & terminal
(F17) No.2 (+) Chassis ground (-):
(CHECK) Is voltage more than 10 V?
(YES) Go to step 1B2.
(NO) Go to step 1B5.
1B2: CHECK GROUND CIRCUIT OF MAIN FAN MOTOR.
1) Turn ignition switch to OFF.
2) Measure resistance between main fan motor connector and chassis ground.
Connector & terminal
(F17) No.1 - Chassis ground:
(CHECK) Is resistance less than 5 ohms?
(YES) Go to step 1B3.
(NO) Repair open circuit in harness between main fan motor connector and chassis ground.
1B3: CHECK POOR CONTACT.
Check poor contact in main fan motor connector.
(CHECK) Is there poor contact in main fan motor connector?