Alarm siren not working
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Alarm › Alarm siren not working
ALARM SIREN NOT WORKING
The siren is connected to the Body Computer Node via the A-Bus dialogue line.
The siren is operated and controlled by the Body Computer Node by means of a series of coded messages; in the case of a failure the Body Computer node detects and memorizes the causes of the malfunction.
The siren is equipped with a battery whose charge is guaranteed in the presence of a +15 supply from the ignition with the alarm system switched off and is managed by the actual siren; the activation/end of charge command is given by the Body Computer
| Results of the tests | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Connect the diagnostic equipment ot the diagnostic socket and check for the presence of the siren at the Body Computer Node in the parameters ambient | Move on to Step 2 | Siren not present | Check the conformity of the vehicle | |
| 2 | SIREN ELECTRICAL EQUIPMENT CHECK | All OK | Problems encountered | Operation |
Check that the power supply for the siren is correct and check the continuity and insulation for the A-BUS serial line between the Body Computer Node and the siren by carrying out the | Move on to Step 3 | |||
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Connect the Examiner diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node in parameters ambient . the correct activation of the siren . the condition of the A-Bus serial line | Move on to Step 4 | The siren is not activated | Replace the siren See Test 5580E40 ANTI-THEFT DEVICE SIREN - R+R | |
| Serial line broken | Renew serial line | |||
| 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 | |
Parts & tools for this job Staging For 2005 Alfa Romeo 159
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Alfa Romeo 159
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.