169000565 - Z71 PRESSURE SENSOR ERROR

The diagnostic equipment signals the following error: "C1131 - Pressure Sensor"

This error may be signalled if there is an open circuit or short circuit (positive or earth) for the wiring or the brake lights switch, if the pressure sensor, the reading circuit or the brake lights switch is damaged, if the sensor does not receive the correct power supply or if the brake lights switch is not correctly calibrated

1	BRAKE PEDAL SWITCH CHECK	All OK	Problems encountered	Operation
	Connect the Examiner, enter into the fault diagnosis in the "PARAMETERS" mode (Engine management) and check the "BRAKE PEDAL STATUS" parameter.Press the brake pedal and read "PRESSED".Release the brake pedal and read "RELEASED"	Move on to Step 5 1	Incorrect reading	Move on to Step 2 1
2	BRAKE PEDAL SWITCH CHECK	All OK	Problems encountered	Operation
	Check the condition of the brake pedal switch Vedere Prova 5550DA VERIFICA FUNZIONALITÀ INTERRUTTORE SU PEDALE FRENO	Move on to Step 4 1	Switch faulty	Replace the brake pedal switch and continue to Step 5    Op. 5550D10 BRAKE LIGHT SWITCH - R+R
3	ELECTRICAL CHECKS	All OK	Problems encountered	Operation
	Check that the electrical connections for the brake lights circuit are correctCheck the continuity of the wiring between the pressure sensor and control unit See E7023 ESP Also check that the brake lights are not burnt out	Move on to Step 2 1	Wiring faulty Brake lights burnt out	Repair the wiring Replace the burnt out bulb and move on to Step 5
4	BRAKE PEDAL SWITCH CHECK	All OK	Problems encountered	Operation
	Check the brake pedal switch is correctly adjusted	Move on to Step 5 1	Switch not correctly adjusted	Adjust the brake pedal switch with reference to Service News 3350 E 000 AA N°33 03.02