22 · Diagnostics

Parking device not working

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Radio and accessories etc.. › Parking device not working

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Fault diagnosisParking device not working

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 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	ACTION
	Connect a diagnostic tester (Examiner) and check the following data in CAN mode: no "control unit inactive" signal that there are no faulty control units 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 efficient when a trailer is connected to the tow hook	Move on to Step 3	Connection inefficient	Restore the wiring, see wiring diagram See E3090 PARKING SENSOR
3	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 ON HEATER PLUGS PROTECTIVE FUSE	Move on to Step 4	1. Fuse activated	1. Eliminate short circuits and then change fuse
			2. Power supply inefficient	2.Renew the wiring
			3. Earth inefficient	3.Restore connection see wiring diagram See E3090 PARKING SENSOR
4	REVERSING SWITCH CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the reversing switch is working properly	Move on to Step 5	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
5	CHECK SYSTEM EFFICIENCY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the efficiency of the Parking Sensor Node system	Move on to Step 8	1. Fault in the buzzer wiring.	1.Move on to step 6
			2. Buzzer faulty	2. Move on to Step 6
			3. Fault in wiring for sensors on bumpers.	3. Move on to Step 7
			4. Sensor/s on rear bumpers inefficient.	4.Move on to step 7
				5. Replace the faulty sensor Op. 5580H36 PARKING SENSOR SYSTEM REAR SENSORS - R.R. WITH REAR BUMPER REMOVED
6	CHECK BUZZER EFFICIENCY	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check buzzer wiring and ensure it is operating efficiently by carrying out the, See Test 5580HD CHECK ON OPERATION OF REAR BUZZER	Move on to Step 7	1. Connection leads faulty.	1.Renew the wiring
			2. Buzzer faulty.	2. Replace the buzzer Op. 5560B10 CONTROL PANEL - R+R
			3. No signal at buzzer.	3. Replace the parking sensor control unit Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
7	PARKING SENSOR EFFICIENCY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check correct operation of the parking sensor circuit by carrying out the See Test 5580HB CHECK ON OPERATION OF PARKING SENSOR SYSTEM	Move on to Step 8	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.
8	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2005 Fiat Croma

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