Alarm volumetric surveillance not working
- Make
- Alfa Romeo
- Model
- Brera and Spider Factory Service Manual
- Year
- 2005–2010
- Section
- Alarm › Alarm volumetric surveillance not working
ALARM VOLUMETRIC SURVEILLANCE NOT WORKING
When the alarm is switched on using the remote control, the system is activated correctly but the volumetric sensors do not intervene.
The volumetric sensors operate at a hyperfrequency and are fitted in the two doors, one in each door and are connected to the Body Computer Node by means of a line known as A-BUS.
The volumetric sensors are operated and controlled by the Body Computer via a series of encrypted messages and can be excluded by the customer using the special button. If there is a failure the Body Computer Node detects and memorizes the causes of the malfunction
| Test results | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect the diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node in parameters ambient: - the presence of the volumetric sensors In errors ambient: - that there are no faults with the volumetric sensors | Move on to Step 4 | Volumetric sensors manually excluded | Switch on the volumetric sensors after getting permission from the customer | |
| Volumetric sensors not present | Check the conformity of the vehicle | |||
| Presence of faults | Continue following the instructions for the diagnostic equipment. | |||
| 2 | ULTRASOUND MODULE POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
Check that the ultrasound module is correctly supplied by carrying out the | Move on to Step 3 | Supply not correct | Restore correct power supply | |
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Connect the diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node in active diagnosis: - the operation of the volumetric modules - the condition of the A-Bus serial line | Move on to Step 4 | A-BUS serial line interruption | Restore the serial line | |
| Driver''s RF module defective | Replace RF in driver''s door | |||
| Passenger side RF module defective | Replace RF in passenger side door | |||
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
| Check that the fault is no longer present | End of diagnosis | The fault persists | Replace Body Computer | |
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