P1482 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1482 – Cooling Fan Circuit Condition

 

P1482 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P1482 Possible Causes

 

Faulty Fan Clutch Assembly,Fan Clutch Assembly harness is open or shorted,Fan Clutch Assembly circuit poor electrical connection

 

P1482 Description

 

The engine cooling fan is a variable speed fan. The Engine Control Module (ECM) controls the fan speed by sending a pulse width modulated signal to the cooling fan speed control module. The cooling fan control module varies the voltage drop across the engine cooling fan motor in relation to the pulse width modulated signal. The cooling fan speed is affected by many different conditions and can be adjusted from 10-90 percent duty cycle. Ninety percent is considered high fan speed. When multiple cooling speed requests are received, the ECM uses the highest cooling fan speed of all the requests. During normal fan ON operation, the control circuit voltage will be low and near battery voltage when the fan is OFF.