Legacy GT LTD Sedan AWD F4-2.5L DOHC (1998)
Condition (3):
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Engine coolant temperature is above 95°C (203° F).
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NC switch is turned ON.
TROUBLE SYMPTOM:
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Radiator sub fan does not rotate at HI speed under conditions (1), (2) and (3) above.
2B1 : CHECK OPERATION OF SUB FAN MOTOR LO MODE.
CAUTION: Be careful not to overheat engine during repair.
1) Start the engine, and warm-up it until engine coolant temperature increases over 95°C (203°F).
2) Stop the engine and turn ignition switch to ON.
3) Turn A/C switch to OFF.
(CHECK) Does the sub fan operate at LO MODE?
(YES) Go to step 2B2.
(NO) Go to LO MODE OPERATION diagnostics chart.
2B2:
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.
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 ON.
6) Measure voltage between sub fan motor connector and chassis ground.
Connector & terminal
(F16) No.3 (+) - Chassis ground (-):
(CHECK) Is voltage more than 10 V?
(YES) Go to step 2B3.
(NO) Go to step 2B4.
2B3: CHECK SUB FAN MOTOR.
1) Turn ignition switch and A/C switch to OFF.
2) Connect battery positive (+) terminal to terminals No.2 and No.3 of sub fan motor connector, and negative (-) terminal to terminal No.1.
(CHECK) Does the sub fan rotate at HI speed?
(YES) Repair poor contact in sub fan motor connector.
(NO) Replace sub fan motor with a new one.
2B4: CHECK POWER SUPPLY TO SUB FAN RELAY-2.
1) Turn ignition switch and A/C switch to OFF
2) Remove sub fan relay-2 from A/C relay holder.
3) Turn ignition switch to ON.