P1481 Cooling Fan Speed Sensor

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. P1481 gmc meaning the engine cooling fan is a variable speed fan. The low reference circuit.

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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.

Dtc p1481 will set if the engine is started without the drive belt on. Check that wiring has continuity the wire to sensor must have 5v. P1481 gmc description the engine cooling fan is a variable speed fan. 8 people found this helpful.

Tests that the pcm receives a cooling fan speed signal through the cooling fan speed signal circuit. 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. If you have a code p1481 or similar pointing at the cooling fan speed sensor often you have to fix or replace the wiring rather that the sensor. Here an interesting website on trailblazer fan system.

The cooling fan speed sensor is built in inside the fan clutch. 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 numbers below refer to the step numbers on the diagnostic table. The cooling fan speed signal circuit.

Its the cooling fan speed sensor that needs to be replaced. P1481 meaning the engine cooling fan is a variable speed fan.

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