323001820 - N079 PARKING DEVICE NOT WORKING

The ultrasound distance measurement parking system provides the driver with information concerning distance when approaching obstacles behind the vehicle. The information concerning the presence and distance of the obstacle is transmitted to the driver by means of acoustic signals whose frequency depends on the distance of the obstacle. The distance measurement only takes place when the system is activated, whilst the control unit micro-controller is operational when the system is deactivated.

the system is activated with the key ON and reverse engaged. The Parking Sensor Node receives a reversing signal from the Body Computer Node via the CAN line.

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment and check the following data in CAN mode:- no "control unit inactive" signal- no "faulty control units" signal- no "faulty CAN line" signalCheck for faults in the parking sensor node	Move on to Step 2.	1.Control unit not activated.2.Control unit faulty.3.Control unit with CAN line error.	1.Move on to Step 2.2.Continue as instructed by the diagnostic equipment.3.Repair any faults on the CAN line.
2	CONTROL UNIT POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the parking sensor node power supply voltage is correct    See T CHECK ON POWER SUPPLY TO THE PARKING SENSOR CONTROL UNIT	Move on to Step 3.	1.Fuse blown.2.Power supply not efficient.3.Earth not efficient.	1.Eliminate any short circuits and then replace fuse F51 in the dashboard junction unit.2.Restore correct power supply.3.Restore earth connection.    See E3090 PARKING SENSOR
3	REVERSING SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the reversing switch is working properly.	Move on to Step 4.	1.Reverse switch defective.2.Wiring from reverse switch to CPL broken.3.Wiring from CPL to NBC broken.4.Switch power supply interrupted.	1.Replace the reverse switch.    Op. 5550D22 REVERSING LIGHT SWITCH - R+R 2.Restore the correct wiring.3.Restore the correct wiring.4.Restore the correct power supply.
4	CHECK SYSTEM EFFICIENCY	All OK	Problems encountered	Operation
	Check the continuity/insulation of the ultrasound sensors circuitCheck that the ultrasound sensors power supply is correct    See Test 5580HB PARKING SENSOR SYSTEM OPERATION CHECK	End of diagnosis.	1.Sensor wiring defective.2.Sensor power supply interrupted.3.Sensors defective.4.Parking sensor control unit defective.	1.Renew the correct wiring.2.Restore correct power supply.3.Replace defective sensor.4.Replace parking sensor control unit.    Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.