N079 PARKING DEVICE NOT WORKING - Fiat - GRANDE PUNTO - eLearn

199000877 - N079 PARKING DEVICE NOT WORKING

The following message appears on the control panel: driving aid not availableThe ultrasound distance detection system for parking provides the driver with information on distance while approaching obstacles behind the car.The information of the presence and distance of an obstacle is transmitted to the driver by means of acoustic warnings whose frequency depends on the distance of the obstacle.The distance measurement only takes place when the system is activated, whilst only the control unit microcontroller is operational in the inactive state.

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
		Results of the tests
	Connect a diagnostic tester (Examiner) and check the following data in CAN mode:- no control unit inactive- that there are no faulty control units- no CAN line error Check that there are no faults in the parking sensor node	Move on to Step 2	1. Control unit inactive2. Control unit error3. Control units with CAN line error	1. Move on to Step 22. Continue as described by the diagnostic equipment3. Repair any faults in the CAN line
2	CHECKING TRAILER TOWING	All OK	Problems encountered	Operation
	Check the enablement is efficient when a trailer is connected to the tow hook	Move on to Step 3	Connection inefficient	Restore the correct wiring See E3090 PARKING SENSOR
3	CHECK CONTROL UNIT POWER SUPPLY	All OK	Problems encountered	Operation
	Check the parking sensor node power supply voltage is correctSee Test 5505AG	Move on to Step 4	1. Fuse blown2. Power supply inefficient3. Earth inefficient	1. Eliminate short circuits and then change fuse2. Restore power supply3. Restore earth connection
4	REVERSING SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the reversing switch is working properly See E2022 REVERSING LIGHTS	Move on to Step 5	1. Reversing switch defective2. Wiring from reversing switch to CPL interrupted3. Wiring from CPL to NBC interrupted4. Switch power supply interrupted	1. Replace the switch2. Restore correct wiring3. Restore correct wiring4. Restore the power supply
5	CHECK SYSTEM EFFICIENCY	All OK	Problems encountered	Operation
	Check the continuity/insulation of the ultrasound sensors circuitCheck that the ultrasound sensors power supply is correctSee Test 5580HB CHECK ON OPERATION OF PARKING SENSOR SYSTEM	End of diagnosis	1. Sensor wiring defective2. Sensor power supply interrupted3. Sensors defective4. Parking sensor control unit defective	1. Restore correct wiring See E3090 PARKING SENSOR 2. Restore correct power supply3. Replace parking sensors Op. 5580H36 PARKING SENSOR SYSTEM REAR SENSORS - R.R. WITH REAR BUMPER REMOVED 4. Replace parking sensors control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.