Hi All,
Hoping for some help on a frustrating issue. I've installed an aftermarket head unit in my 2012 Bose Amplified CX-9, using AERPRO harnesses, including wiring up the amp trigger wire from the unit to the harness. When I turn the ignition key to ACC, the system works perfectly. I get sound, radio, android auto etc, all great. However, when I turn the ignition key to ON or START to actually start the car, there is a blaring alarm sound that starts, goes off every couple of seconds, and never stops. I've tried with a different brand of head unit, same thing. I've checked with AERPRO who have confirmed everything is wired up correctly, and they have never heard of this issue. Clearly there are plenty of people who have installed their units in the Bose Amplified CX-9 fine, so I don't know.
This has been discussed years ago on a couple of forums;
mazdas247.com
With the only fix being suggested that you turn the ignition key to ON/START first, before ACC. That doesn't work for me.
Where could the issue be coming from? Is there a fix? What even is the purpose of that alarm? If there isn't a fix, would simply replacing the amp with an aftermarket amp work? Is amp replacement a DIY job for a fairly enthusiastic novice?
Thanks in advance!
Hoping for some help on a frustrating issue. I've installed an aftermarket head unit in my 2012 Bose Amplified CX-9, using AERPRO harnesses, including wiring up the amp trigger wire from the unit to the harness. When I turn the ignition key to ACC, the system works perfectly. I get sound, radio, android auto etc, all great. However, when I turn the ignition key to ON or START to actually start the car, there is a blaring alarm sound that starts, goes off every couple of seconds, and never stops. I've tried with a different brand of head unit, same thing. I've checked with AERPRO who have confirmed everything is wired up correctly, and they have never heard of this issue. Clearly there are plenty of people who have installed their units in the Bose Amplified CX-9 fine, so I don't know.
This has been discussed years ago on a couple of forums;
Bose amp interface w/ aftermarked radio (2013 CX-9) - Mazda Forum - Mazda Enthusiast Forums
Mazda CX-9 - Bose amp interface w/ aftermarked radio (2013 CX-9) - Hello, I have a 2013 CX-9 GT (Bose amp and navigation-ready head unit) and I am trying to replace the head unit with an Android (KLD MTCD) unit. I am having however problems driving the Bose amp. No matter what I do all I get is...
www.mazdaforum.com
Alarm Sound when Replacing Stereo (2015 CX-9 w/ Bose)
I've got the 2015 CX-9 with Bose and Navigation but the Head Unit was awful so I'm replacing it with an Android unit. I'm getting the most heinous alarm-like sound so loud out of the speakers you can't stay in the car. The tone goes on for 1 second, off for one second and never ends. I've...
With the only fix being suggested that you turn the ignition key to ON/START first, before ACC. That doesn't work for me.
Where could the issue be coming from? Is there a fix? What even is the purpose of that alarm? If there isn't a fix, would simply replacing the amp with an aftermarket amp work? Is amp replacement a DIY job for a fairly enthusiastic novice?
Thanks in advance!
