getting the message alarm service required?

2005 VOLVO XC90
144 MILES • 2.9L • 6 CYL • 4WD • AUTOMATIC
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VICTORY76
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  • 27 POSTS
I replaced the backup batteries inside the alarm. But still getting the message alarm service required, or reset alarm siren, how can I reset the alarm siren. All other jobs or issues were resolved. thanks for your help.
Feb 16, 2023 at 1:58 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
That's good to hear, can you go back to the posts and enter the fixes for us please? Also, on the alarm system reset you need to remove the battery negative terminal overnight which should reset the system. If not, let's do a system hard reboot, which is done by removing the negative side of the battery, with the cable loose from the negative side of the battery, hold it to the positive terminal for 1 minute this will discharge the memory capacitors in the alarm allowing the system to reboot. Please let me know how it goes.
Feb 17, 2023 at 9:16 AM
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