194002029 - 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 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
1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
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 21. Control unit inactive1.Move on to step 2
2. Control unit error2. Continue as instructed by the diagnostic equipment
3. Control units with CAN line error3. Repair any faults in the CAN line
2CHECKING TRAILER TOWINGALL OKPROBLEMS ENCOUNTEREDACTION
Check the enablement is efficient when a trailer is connected to the tow hookMove on to Step 3Connection inefficientRestore the wiring, see wiring diagram    See E3090 PARKING SENSOR
3CHECK CONTROL UNIT POWER SUPPLYALL OKPROBLEMS ENCOUNTEREDACTION
Check the parking sensor node power supply voltage is correct by carrying out,    See Test 5505AG CHECK ON HEATER PLUGS PROTECTIVE FUSEMove on to Step 41. Fuse activated1. Eliminate short circuits and then change fuse
2. Power supply inefficient2.Renew the wiring
3. Earth inefficient3.Restore connection see wiring diagram    See E3090 PARKING SENSOR
4REVERSING SWITCH CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the reversing switch is working properlyMove on to Step 51. Reversing switch defective1. Replace the reversing switch    Op. 5550D22 REVERSING LIGHT SWITCH - R+R
2. Wiring from reversing switch to CPL interrupted2.Renew the wiring
3. Wiring from CPL to NBC interrupted3.Renew the wiring
4. Switch power supply interrupted4. Restore the power supply
5CHECK SYSTEM EFFICIENCYALL OKPROBLEMS ENCOUNTEREDACTION
Check the efficiency of the Parking Sensor Node systemMove on to Step 81. Fault in the buzzer wiring.1.Move on to step 6
2. Buzzer faulty2. 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
6CHECK BUZZER EFFICIENCYALL OKPROBLEMS ENCOUNTEREDACTION
Check buzzer wiring and ensure it is operating efficiently by carrying out the,    See Test 5580HD CHECK ON OPERATION OF REAR BUZZERMove on to Step 71. 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.
7PARKING SENSOR EFFICIENCY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check correct operation of the parking sensor circuit by carrying out the    See Test 5580HB CHECK ON OPERATION OF PARKING SENSOR SYSTEMMove on to Step 81. Sensor wiring defective1.Renew the wiring
2.Sensor power supply interrupted2.Restore power supply
3. Sensors defective3. Replace sensors    Op. 5580H36 PARKING SENSOR SYSTEM REAR SENSORS - R.R. WITH REAR BUMPER REMOVED
4. Parking sensor control unit defective4. Replace the parking sensor control unit    Op. 5580H10 PARKING OBSTACLE DETECTION DEVICE ELECTRONIC CONTROL UNIT - R.R.
8CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentEnd of diagnosis