Andyparker
Member
Hi People, any idea where one might find ones alarm siren on a 2005 Range Rover 3.0L TD6?.
Many thanks, Andy
Many thanks, Andy
brian47
Well-Known Member
http://www.ebay.co.uk/itm/Range-Rov...170863?hash=item4d45d68e6f:g:ECMAAOxy3zNSeRtF
The alarm sounder and associated components are referred to as BBUS.
The BBUS is installed in the rear corner of the engine compartment, on the driver's side, on a bracket attached to the front wing. Depending on the BCU configuration, the BBUS can be used to produce the audio acknowledgement for arming and disarming of the alarm system as well as the audio warning after an alarm has been triggered.
The BBUS is normally operated by a permanent battery feed from the passenger compartment fusebox. An integral 7.2 V rechargeable battery powers the BBUS if it is disconnected from the vehicle battery.
The BBUS sounds when it receives an alarm or acknowledgement signal from the BCU. While the alarm system is armed, the BBUS also monitors the battery power supply and the arm/disarm signal line from the BCU, and operates the sounder if the battery power supply or the arm/disarm signal line is disconnected. The BCU arms and disarms the BBUS together with the rest of the alarm system.
Once an alarm has been triggered, the BBUS cycles the sounder on for 30 seconds and off for 15 seconds, for 5 minutes or until it receives a disarm signal from the BCU. If the alarm trigger is still present, the 5 minutes of on/off cycles is repeated a further 2 times. The alarm output from the BBUS is either a constant tone or a modulated tone, depending on the market. The continuous tone has a nominal value of 113 dBA when powered by the vehicle battery and 108 dBA when powered by the integral battery. The modulated tone has a nominal value of 109 dBA when powered by the vehicle battery and 104 dBA when powered by the integral battery.
The sounder is also in that area of the vehicle; in the corner of the engine bay, on the driver's side. It might be on the bulkhead or the wing. For security reasons the sounder might be in an awkward to get to place behind a wing liner.
The alarm sounder and associated components are referred to as BBUS.
The BBUS is installed in the rear corner of the engine compartment, on the driver's side, on a bracket attached to the front wing. Depending on the BCU configuration, the BBUS can be used to produce the audio acknowledgement for arming and disarming of the alarm system as well as the audio warning after an alarm has been triggered.
The BBUS is normally operated by a permanent battery feed from the passenger compartment fusebox. An integral 7.2 V rechargeable battery powers the BBUS if it is disconnected from the vehicle battery.
The BBUS sounds when it receives an alarm or acknowledgement signal from the BCU. While the alarm system is armed, the BBUS also monitors the battery power supply and the arm/disarm signal line from the BCU, and operates the sounder if the battery power supply or the arm/disarm signal line is disconnected. The BCU arms and disarms the BBUS together with the rest of the alarm system.
Once an alarm has been triggered, the BBUS cycles the sounder on for 30 seconds and off for 15 seconds, for 5 minutes or until it receives a disarm signal from the BCU. If the alarm trigger is still present, the 5 minutes of on/off cycles is repeated a further 2 times. The alarm output from the BBUS is either a constant tone or a modulated tone, depending on the market. The continuous tone has a nominal value of 113 dBA when powered by the vehicle battery and 108 dBA when powered by the integral battery. The modulated tone has a nominal value of 109 dBA when powered by the vehicle battery and 104 dBA when powered by the integral battery.
The sounder is also in that area of the vehicle; in the corner of the engine bay, on the driver's side. It might be on the bulkhead or the wing. For security reasons the sounder might be in an awkward to get to place behind a wing liner.
Last edited:
Andyparker
Member
There is no noise. It needs replacing. Cheers for the helpful advice.
Andyparker
Member
Thankyou.
Andyparker
Member
Thanks for the advice. I've bought an alarm siren from eBay. As you said it cost me a fiver. I have fitted it and it seems to work. I have a question for you, the alarm siren is only emitting what I can only describe as a weak beep, beep, beep sound. I was expecting a more robust siren sound. Is this the standard siren sound?. Many thanks, Andy
