Suzuki Landy Security System Failure and Alarm Issues

Had almost the exact same automotive alarm issue with my 2014 Suzuki Swift Hybrid last winter. Have moderate experience with car electronics and initially tried basic fault detection steps myself. The symptoms matched yours perfectly, complete alarm system failure and no response from the remote. After my own troubleshooting hit a wall, took it to a workshop specializing in vehicle security systems. They diagnosed a faulty connection in the main alarm control wiring harness where it connects to the siren unit. The fix involved replacing some corroded wiring and a connector, total repair cost was 95€. Since the alarm reset and rewiring, everything has worked flawlessly. Was relieved it wasnt the entire control unit needing replacement. To help diagnose your case more precisely, could you share: Does the key fob battery test ok? Are there any other electrical issues? When exactly did the alarm disarm function stop working? Can you still lock/unlock doors with the physical key? The repair required specialized diagnostic equipment, so while initial checks can be done at home, professional help was needed for the actual fix.

Thanks for the feedback. In my case the alarm signal problem started suddenly last week, with no prior warning signs. Currently at 104286 KM, about 2 months after the last scheduled service. The key fob battery is new and tests fine. Doors work normally with the physical key, and all other electrical systems function correctly. The security breach seems isolated to just the alarm functionality. The complete alarm system shutdown and error code match your symptoms exactly. Your repair solution sounds promising since my issue appears nearly identical. Will likely need that specialized diagnostic check to confirm if its also a wiring harness fault in my case. Good to know the repair was relatively straightforward and cost-effective in your situation. Helps narrow down the likely causes of my alarm reset issues.

Thanks for the additional details. The similarities to my Suzuki Swift issue are striking, especially the sudden complete alarm system failure without warning signs. After dealing with my own wiring issue back then, another point worth checking is the siren mounting area. In my case, the wiring harness damage occurred where it flexes near the mounting bracket. This led to intermittent connectivity before the total system failure. The fact your doors and other electronics work perfectly also matches my experience. This strongly suggests a localized fault in the alarm circuit rather than a broader vehicle security system problem. When the workshop diagnosed my automotive alarm, they found moisture had entered through a damaged grommet near the siren housing, contributing to the wiring corrosion. Worth having them check this area during diagnosis. Based on your mileage and the abrupt failure pattern, I suspect youll find a similar wiring issue as the root cause rather than an alarm controller fault. The professional diagnostic check should quickly pinpoint if its the same harness connection problem I encountered. Would recommend documenting when exactly the error code first appeared, this helped the workshop with my repair case. Keep us posted on what they find.

Thanks for the input. Your experiences really helped clarify the likely source of my alarm system trouble. After reading through the details of your similar cases, particularly the wiring issue causing siren communication faults, I feel much more confident about getting this fixed. I checked the siren mounting area as suggested and noticed some signs of moisture around the grommet, which matches what you found. Going to schedule diagnostic work with a security system specialist this week. The fault detection process you described gives me a good idea of what to expect. Will get the wiring harness thoroughly checked, especially around those flex points near the mounting bracket where your signal problem developed. Really hoping its just a connector or wiring repair needed rather than a full control unit replacement. Thanks again for sharing your repair outcomes. Having real examples of successful fixes for such similar symptoms on Suzuki vehicles is incredibly helpful. Will update once I get the diagnostic results and repair completed.