P1481 Cooling Fan Speed Sensor

The engine control module 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.

P1481 cooling fan speed sensor.

Tests that the pcm receives a cooling fan speed signal through the cooling fan speed signal circuit. Its the cooling fan speed sensor that needs to be replaced. The engine control module 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 engine control module 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.

I got check engine light on and poped code p1481 fan speed circuit sensor does that mean that i have a bad fan clutch since mine is an electronic fan clutch. 8 people found this helpful. P1481 gmc description the engine cooling fan is a variable speed fan. The cooling fan speed signal circuit.

Check that wiring has continuity the wire to sensor must have 5v. P1481 meaning the engine cooling fan is a variable speed fan. P1481 gmc meaning the engine cooling fan is a variable speed fan. The low reference circuit.

Here an interesting website on trailblazer fan system. Dtc p1481 will set if the engine is started without the drive belt on.