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Home >> Nissan-Datsun >> 2003 >> Altima L4-2.5L (QR25DE) >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Cooling System >> Radiator Cooling Fan Control Module >> Description and Operation
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Radiator Cooling Fan Control Module: Description and Operation

ENGINE OVER TEMPERATURE

System Description

NOTE: If DTC P1217 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to "DTC U1000, U1001 CAN COMMUNICATION LINE". U Code Charts

Cooling Fan Control:




COOLING FAN CONTROL
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].

The ECM controls cooling fan relays through CAN communication line.

Operation:




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