Cooling Fan Speed Sensor

The hall effect sensor returns a signal pulse through the speed signal circuit in response to the reluctor track which is located inside the fan clutch.

Cooling fan speed sensor.

The p0526 code means that the pcm detected a voltage reading that was either too low or too high from the electric cooling fan control circuit. What the p0526 code means. If during operation the pcm detects a loss of the cooling fan speed signal dtc p0526 will set. Thus it s good to monitor the fan speed using an advanced scan tool to verify if the actual fan speed matches the commanded fan speed.

This diagnostic trouble code dtc is a generic obd ii powertrain code. Replace the harness with an improved design part no. If the fan comes on you may have a bad temperature sensor or gauge. As the speed of the fan increases the voltage must also increase.

It is considered generic because it applies to all makes and models of vehicles 1996 newer although specific repair steps may vary depending on the model. The damage occurs because the harness pulls out of its plastic protective sleeve exposing the insulation to the sharp edges of the sleeve. If the cooling fan speed sensor fails then it must be replaced. In order to maintain proper powertrain cooling requirements and to reduce the cooling fan noise as it is in use the pcm uses a signal from the cooling fan to assess its speed.

Cooling fan speed sensor circuit.