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Wiring diagram - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
Components - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
| Component code | Name | Assembly reference |
| C30 | LEFT REAR EARTH ( REAR ) | - |
| D89 | PARKING SENSOR COUPLING | - |
| K97 | PARKING SENSOR UNIT | - |
| K97 | Left outside parking sensor | - |
| K97 | Right centre parking sensor | - |
| K97 | Right outside parking sensor | - |
| M84 | PARKING SENSOR ECU | - |
| P44 | PARKING SENSOR SPEAKER | - |
Location of components - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
Components - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
| Component code | Name | Assembly reference |
| C30 | LEFT REAR EARTH ( REAR ) | - |
| D89 | PARKING SENSOR COUPLING | - |
| K97 | PARKING SENSOR UNIT | - |
| K97 | Left outside parking sensor | - |
| K97 | Right centre parking sensor | - |
| K97 | Right outside parking sensor | - |
| M84 | PARKING SENSOR ECU | - |
| P44 | PARKING SENSOR SPEAKER | - |
Description - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
The parking assistance system provides the driver with information whilst reversing relating to distance when approaching obstacles which are behind the vehicle, which could be outside the driver''s field of view.The information that there is an obstacle and its distance is transmitted to the driver by means of acoustic signals whose frequency varies according to the distance of the vehicle from the obstacle.An electronic control unit activates and controls the operation of the four sensors located in the rear bumper, processing the signals received and activating the acoustic signal inside the luggage compartment on the left hand side.The system is activated when reverse gear is engaged: under these conditions the control unit energizes the transducers and sends them a request signal, receiving response signals.The ultrasound technology sensors act as intelligent transmitters/receivers through a triangulation technique: this allows improved detection in critical situations or in the presence of small obstacles. The impulses emitted are reflected by any obstacles; the transducers therefore receives an echo which is converted into a digital signal and sent to the electronic control unit.The distance of the obstacle is signalled by sounds with intermittent impulses: the frequency of this signal increases gradually as the bumper approaches an obstacle: when the distance calculated is less than about 30 cm, the sound becomes high pitched and constant; the acoustic signal, on the other hand, ceases when the distance of the obstacle increases.For more details and information on the operation of the system,The control unit has an autodiagnostic function: when it is switched on the control unit carries out an initial test on the sensors.which are then continuously diagnosed during the operation of the system.A fault with only one sensor inhibits the operation of the entire system: in this case, the system excludes itself: the failure status is signalled sending a suitable high frequency acoustic warning.The system is activated with reverse gear engaged; the signal that the reversing lighthas come on supplies the parking sensors control unit directly.
Functional description - PARKING SENSOR - Alfa Romeo GT 1.8 T.SPARK
The parking sensor control unitM84 is supplied at pin 1 of connector A by the ignition-operated line INT protected by fuse F49 of junction unit B2 with this line sending the power supply to the control unit M84 with reverse gear engaged (switch I20) this supply is also sent from pin 6 to pin 9 of connector A;pins 8 and 16 of connector A ofM84 are earthed.The control signals for activating the buzzerP44 are sent from pins 2 and 10 of connector A of M84.The four parking sensorsK97 are connected to connector B of control unit M84 pin 1 providing the reference earth, pin 6 the power supply and pin 2 the signal for the right interior sensor K97D.Similarly, pins 7, 10 and 3 for the left interior sensorK97C; pins 8, 11 and 4 for the right exterior sensorK97B;and pins 9, 12 and 5 for the left exterior sensorK97A;.
