N079 PARKING DEVICE NOT WORKING - Alfa - 159 - eLearn

939003726 - N079 PARKING DEVICE NOT WORKING

The following message appears on the control panel: driving aid not available The ultrasound distance detection system for parking provides the driver with information on distance while approaching obstacles behind or in front of the car (only 8 channel version). The information of the presence/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 4 channel system is activated at the key ON with reverse gear engaged whilst the 8 channel system is activated at the key ON, with reverse gear engaged, the LED in the parking sensors activation button on and the vehicle speed below 15 Km/h. The parking sensor node receives the reversing signal from the Body Computer node via the CAN line

1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	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" signal Check for faults in the parking sensor node	Move on to Step 2	1. Control unit inactive	1.Move on to step 2
			2. Control unit error	2. Continue as instructed by the diagnostic equipment
			3. Control units with CAN line error	3. Repair any faults in the CAN line
2	CHECKING TRAILER TOWING	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the enablement is activated when a trailer is connected to the tow hook	Move on to Step 3	Connection inefficient	Restore the wiring see the wiring diagram See E3090 PARKING SENSOR
3	SPEED SIGNAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect to the Body Computer node using the Examiner and check that the speed signal is working properlyConnect to the brake node and check that the wheel speed signals are working properly	Move on to Step 4	Speed signal broken	Restore the speed signal.
4	CHECK CONTROL UNIT POWER SUPPLY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the parking sensor node power supply voltage is correct by carrying out See Test 5505AG CHECK SPARK PLUG HEATING FUSE	Move on to Step 5	1. Fuse activated	1. Eliminate short circuits and then change fuse
			2. Power supply inefficient	2.Restore the correct wiring.
			3. Earth inefficient	3.Renew the connection See E3090 PARKING SENSOR
5	CHECK ON FRONT PARKING SENSORS DISABLING BUTTON	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the front parking sensors disabling switch is working properly by carrying out See Test 5580HC CHECK THE OPERATION OF THE PARKING SENSOR DISABLEMENT BUTTON	Move on to Step 6	1.Switch defective	1.Replace the centre front courtesy light
			2.Wiring defective	2.Restore wiring continuity
			3. Parking sensor control unit defective.	3. Replace the parking sensor control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
6	REVERSING SWITCH CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the reversing switch is working properly.	Move on to Step 7	1.Reversing switch defective	1.Replace the reversing switch Op. 5550D22 REVERSING LIGHT SWITCH - R+R
			2.Wiring from reversing switch to CPL interrupted	2.Renew the wiring
			3.Wiring from CPL to NBC interrupted	3.Renew the wiring
			4.Switch power supply interrupted	4.Restore the power supply.
7	CHECK SYSTEM EFFICIENCY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the efficiency of the Parking Sensor Node system.	Move on to Step 10	1. Fault in the buzzer wiring.	1.Move on to step 8
			2. Buzzer faulty.	2. Move on to Step 8
			3.Fault in wiring for sensors on bumpers.	3.Move on to step 9
			4.Sensor/s on rear bumpers inefficient.	4.Replace the faulty rear sensor(s) Op. 5580H36 PARKING SENSOR SYSTEM REAR SENSORS - R.R. WITH REAR BUMPER REMOVED
			5.Sensor(s) in front bumper not working properly (8 channel version)	5.Replace the faulty front sensor(s)
8	CHECK ON FRONT BUZZER EFFICIENCY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the buzzer wiring and make sure it is working properly by carrying out See Test 5580HE FRONT BUZZER OPERATION CHECK	Move on to Step 10	1.Connection leads faulty.	1.Renew the wiring
			2.Buzzer faulty..	2. Replace the buzzer
			3. No signal at buzzer.	3. Replace the parking sensor control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
9	CHECK ON REAR BUZZER EFFICIENCY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the buzzer wiring and make sure it is working properly by carrying out See Test 5580HD REAR BUZZER OPERATION CHECK	Move on to Step 10	1.Connection leads faulty.	1.Renew the wiring
			2.Buzzer faulty..	2. Replace the buzzer
			3. No signal at buzzer.	3. Replace the parking sensor control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
10	PARKING SENSOR EFFICIENCY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check correct operation of the parking sensor circuit by carrying outOp. 5580HB CHECK ON OPERATION OF PARKING SENSOR SYSTEM	Move on to Step 11	1. Sensor wiring defective	1.Renew the wiring
			2.Sensor power supply interrupted	2.Restore power supply
			3.Sensors defective.	3. Replace sensors Op. 5580H36 PARKING SENSOR SYSTEM REAR SENSORS - R.R. WITH REAR BUMPER REMOVED
			4. Parking sensor control unit defective.	4. Replace the parking sensor control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
11	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present.	End of diagnosis