Bizarre Alarm Issue Question

[brianrounds]

Hey all, i'm just putting this out to the masses of experience we have here. I have a 2006 Cobalt 220 with a Merc 496 Bravo 1. Out of no where the alarm just started going off... beep... beep... you get it. It stops in 5 minutes, very annoying. I took it to my local dealer and the alarm is producing NO code. How odd is that? Everything else is measuring out fine on the boat. All levels are perfect, etc.

Any ideas?

The dealership is calling Merc tomorrow.

[Big Block Power]

Not sure but the drive oil level was the biggest head ache on a merc.

[brianrounds]

The level in the reservoir inside the engine compartment is at the normal level. I hope Mercury has something to help with the problem. It's really bizarre with the computer not giving a code.

[Bfun220]

Could the beeping be from the depth gauge ?

[cmattj]

Good thinking B. Check that and the merc sender in the bottle can still be tricky. Unplug the sensor on the bottom to bypass the sensor.

Not sure that stores history codes.

[brianrounds]

I'll check that out tomorrow. When this all started I was in 3 foot water... thanks - i'll report back tomorrow.

[AsLan7]

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Yes....I'm gonna say that's your depth sounder alarm that you are hearing. It beeps like crazy at times unless the defaults are set properly. In fact, I set all my settings on the depth sounder to Zero so that beeping doesn't go off. Very annoying. Units should be to Ft (feet) not Fm (fathoms) ....DP (depth) alarm set to Zero....KL (Keel) setting zero.....

Hope that helps

....and welcome aboard mate!

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[Big Block Power]

Could the beeping be from the depth gauge ?

Oh the wise one thinking out of the box for us. I think I might be with B on this one!

[Bfun220]

Could the beeping be from the depth gauge ?

Oh the wise one thinking out of the box for us. I think I might be with B on this one!

We're thinking a like ?

[Ytmsn]

3 feet of water? Yes, definitely your depth gage. Toggle the switch and it'll turn off. For awhile anyway. Set it at zero and you should be good.

If B and BB are one the same page I'm guessing it's a coloring book.

[AsLan7]

I'll check that out tomorrow. When this all started I was in 3 foot water... thanks - i'll report back tomorrow.

BTW,

Here is the link to the thread that shows the manual and instructions for ours. Maybe it will help with yours....
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viewtopic.php?f=21&t=529&p=6554&hilit=sounder#p6554

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[brianrounds]

Thanks everyone... I was hoping it was going to be that easy... but apparently not. They have ruled the depth alarm out. When the key ignition is turned on you hear the beep - the ECM powers up and a single beep means everything is good to go as far as the computer is concerned at that point. Then when you start the engine a few seconds later there is another beep and all the gauges cycle back and forth and the engine throttles up and back down. This has been happening for about 2 months and the boat has run top notch. Zero problems.

Then last week after the second beep it continued beeping for 5 minutes. This was after I was anchorage in shallow water for a couple hours. Thus, the feedback was a depth alarm.

My dealer has been in contact with Cobalt support and they've recorded several chunks of data off the ECM and sent it to Cobalt and they are troubleshooting different things. They say it could be a faulty ignition and/or a glitch in the ECM software. The ECM might need to be removed and sent to Cobalt for a wipe and software reinstall.

Fun and joy.

[Big Block Power]

I would think that's a merc ecu not Cobalt!

[AsLan7]

Thanks everyone... I was hoping it was going to be that easy... but apparently not. They have ruled the depth alarm out. When the key ignition is turned on you hear the beep - the ECM powers up and a single beep means everything is good to go as far as the computer is concerned at that point. Then when you start the engine a few seconds later there is another beep and all the gauges cycle back and forth and the engine throttles up and back down. This has been happening for about 2 months and the boat has run top notch. Zero problems.

Then last week after the second beep it continued beeping for 5 minutes. This was after I was anchorage in shallow water for a couple hours. Thus, the feedback was a depth alarm.

My dealer has been in contact with Cobalt support and they've recorded several chunks of data off the ECM and sent it to Cobalt and they are troubleshooting different things. They say it could be a faulty ignition and/or a glitch in the ECM software. The ECM might need to be removed and sent to Cobalt for a wipe and software reinstall.

Fun and joy.

Oooh. Sorry to hear that BR Most fixes I’ve found are normally simple. Occasionally a large one will creep up. Hopefully you get her solved in no time. Thanks for the follow up. Let us know what they find.

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[Big Block Power]

Maybe you could swap out ECU with lstgrt1?