323001953 - 5040DC SOLAR SENSOR OPERATION CHECK (Automatic air conditioning)

Using a multimeter, check with the ignition key in the ON position between pins 1 and 3 and between pins 2 and 3 of the solar sensor    See K090 SOLAR SENSORthat the voltage is proportional to the thermal energy present on the windscreen analyzed by the sensor photodiodes: the signal should be less than 5 Volts (between 4.5 V - minimum solar rays - and 0.5 V - maximum solar rays). If it is not working, using a multimeter and disconnecting the sensor, check between pins 1 and 3 and pins 2 and 3 of the sensor supply connector with the ignition ON.    See K090 SOLAR SENSORthat there is a voltage of 5 Volts.