04 Tahoe Q7 warning buzzer.....

lampskies

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I've had my q7 since new. I change all fluids and oil filter 3 times a year, spring, July 4th and fall when winterizing. This year as usual all changed and she fired right up. I dumped her in and I kept getting random warning beeps. All gauges we're fine, trim fluid was half full so I capped it off. Still had the problem. Our lake that I live on is about 400 acres and it would beep about three different times on a full circle running about 28mph. I found a forum and replaced the idle air controll switch.....problem solved......now a month later I get a random beep under power in rough water and it shuts the boat down. Mostly while pulling a wake boarder. I am assuming its a sensor that do to the tilting of the boat it setting it off. I unplugged the two wires that run to the bottom of stern drive bottle......still no solution. I found the oil preassure switch and unplugged.....fired it up and gauge says 0......next is to drive it and see if it stops. But I'm not sure I'm unplugging the right wires to check......any ideas?
 

Bondo

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Re: 04 Tahoe Q7 warning buzzer.....

I've had my q7 since new. I change all fluids and oil filter 3 times a year, spring, July 4th and fall when winterizing. This year as usual all changed and she fired right up. I dumped her in and I kept getting random warning beeps. All gauges we're fine, trim fluid was half full so I capped it off. Still had the problem. Our lake that I live on is about 400 acres and it would beep about three different times on a full circle running about 28mph. I found a forum and replaced the idle air controll switch.....problem solved......now a month later I get a random beep under power in rough water and it shuts the boat down. Mostly while pulling a wake boarder. I am assuming its a sensor that do to the tilting of the boat it setting it off. I unplugged the two wires that run to the bottom of stern drive bottle......still no solution. I found the oil preassure switch and unplugged.....fired it up and gauge says 0......next is to drive it and see if it stops. But I'm not sure I'm unplugging the right wires to check......any ideas?

Ayuh,.... Welcome Aboard,... We don't care what the boat is,... What is the Motor, 'n Drive,..??
 

Don S

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Re: 04 Tahoe Q7 warning buzzer.....

What you need to post is the engines Mercruiser serial number.
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

Hmmmmm I want to say efi......and I ment to say stern drive fluid resivoir warning.......sorry
 

Don S

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Re: 04 Tahoe Q7 warning buzzer.....

Since you have an engine alarm, perhaps the Engine serial number might be of more help.
 

Don S

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Re: 04 Tahoe Q7 warning buzzer.....

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lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

OM 683986. Mpi. Daaaaaa right on the flame retarder cover......MCM 5.0L MPI
 

Don S

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Re: 04 Tahoe Q7 warning buzzer.....

Ok, you say you have random warnings. Is this a steady beep or 2 beeps per minute?
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

It was a random 2 beeps before I changed it iac valve. Some warning I got while low on stern drive fluid.......now in rough water it randomly will beep and lose power......oil preassure, 40-55 lbs water temp 165
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

Short single beep......mostly with wakeboarder in tow and a few people in the bock with nose up
 

Don S

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Re: 04 Tahoe Q7 warning buzzer.....

You need to get it hooked up to a diagnostic computer and find out what is causing it. There are a couple dozen differnt things that cause the 2 bp/min alarm.

Alarm.jpg
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

I unplugged ALL sensors. As soon as I unplugged oil sensor at idle here on shore station now I have two short beep every minute or so
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

Wire connector carroded inside oil switch.......cleaning with contact cleaner and brush
 

Bondo

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Re: 04 Tahoe Q7 warning buzzer.....

I unplugged ALL sensors. As soon as I unplugged oil sensor at idle here on shore station now I have two short beep every minute or so

Ayuh,.... If you unplugged ALL the sensors, the motor won't even start....

You need to hook it up to the diagnostic 'puter....
 

lampskies

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Re: 04 Tahoe Q7 warning buzzer.....

Just ones with purple alarm wires too them........plugged back in.......smooth sailing for 15 mins.....no beeps, no shut down! Let's see if it makes it the day......
 
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