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I've got a 2012 260 Monterey with a 350 magnum. After an overheat condition caused a solid steady alarm and slowed engine The overheat condition was repaired.However I have a curious alarm where the alarm beeps once every 60 seconds. Any clues?

thanks Murray

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11 hours ago, HeyBoatman said:

I've got a 2012 260 Monterey with a 350 magnum. After an overheat condition caused a solid steady alarm and slowed engine The overheat condition was repaired.However I have a curious alarm where the alarm beeps once every 60 seconds. Any clues?

thanks Murray

Look at the attached table and concentrate on items marked 2 beeps per minute.  W

Warning Chart

The engine warning system incorporates an audio alarm and, if installed, Smartcraft

Gauges System. When the key switch is turned to the ON position, the audio alarm will

momentarily activate to test thewarning system. The alarm should sound once if the system

is operable. This table is a guick guide, showingwhat warning output will accompany a fault.

Fault Smartcraft Gauges Audio Alarm Available Power Description

ECT      CKT HI                  Yes 2 Bp/min             90%              Open

ECT      CKT LO                 Yes 2 Bp/min             90%              Short

ECT      Coolant Overheat  Yes Constant           6 - 100 %   Overheat condition

EST 1   Open 1                      Yes 2 Bp/min            100%         Coil harness wire open

EST 1   Short 1                      Yes 2 Bp/min             100%         Coil harness wire short

Fuel Injector 1-7-4-6 Open Yes 2 Bp/min            100%          Fuel injector wire open

Fuel Injector 3-5-2-8 Open Yes 2 Bp/min            100%          Fuel injector wire open

Guardian Strategy              Yes Constant         0% - 100%     Protection Strategy

IAC Output LO/HI 2                Yes 2 Bp/min             90%                   Open

Knock Sensor 1 Lo             Yes 2 Bp/min              90%                   Open

Knock Sensor 1 Hi              Yes 2 Bp/min              90%                   Short

Low Drive Lube Strategy     Yes Constant            100%         Low oil in sterndrive

Low Oil Pressure Strategy   Yes Constant          0 - 100%      Low oil pressure strategy

 

NOTE: If any 5v sensor becomes shorted to ground the engine will not start. If the engine is operating when the short occurs the engine may stop operating and will not start.

 

NOTE: 1 GM EFI ignition system failure open or shorted, driver will flag EST 1 fault.

 

NOTE: 2 TPS must see 5% throttle then back to 0% to flag IAC fault.

 

NOTE: 3 2-wire sensor open will read sensor Hi on scan tool.

 

NOTE: 4VDC PWR Low - if shorted or no voltage engine will not start; if VDC PWR voltage falls velow 22 volts will set sensor faults.

 

NOTE: 5 Shift Switch - will activate code when engine rpm are above 3500 rpm and 40%

load.

 

GENERAL INFORMATION SERVICE MANUAL NUMBER 36

Page 1A-26 90-864573 FEBRUARY 2002

Warning Chart (continued)

Fault Smartcraft Gauges    Audio Alarm    Available Power    Description

Main Power Relay Output           Yes                 No N/A           Engine will not start

Main Power Relay Backfeed       Yes                No N/A            Engine will not start

MAP Sensor 1 Input High            Yes             2 Bp/min 90%   High voltage or short

MAP Sensor 1 Input Low             Yes             2 Bp/min 90%    Open, no visual on

SC1000 Oil PSI CKT Hi               Yes             2 Bp/min 90%    Open, defaults to 50.7 psi

Oil PSI CKT Lo                             Yes            2 Bp/min 90%     Short, defaults to 50.7 psi

Overspeed                                   Yes            Constant       rpm limit Engine over rpm limit

Pitot CKT Hi                             No                    100%              Short or high voltage

Pitot CKT Lo                            No                     100%                         Open

Sea Pump PSI Lo                  Yes Constant     6-100%

GuardStrat Sea Pump CKT Hi  Yes  2 Bp/min     90%                   Open - 0 psi reading

Sea Pump CKT Lo                 Yes 2 Bp/min          90%                   Voltage high or short

Sea Water Temp                        No          N/A                            Defaults to --31 degreesC

Fuel Level #1 No                                                      N/A                           Only if turned on

STB EMCT CKT Hi                     N/A        N/A         N/A                                N/A

STB EMCT CKT Lo                    N/A         N/A        N/A                                 N/A

STB EMCT CKT Overheat         N/A         N/A        N/A                                  N/A

 

NOTE: If any 5v sensor becomes shorted to ground the engine will not start. If the engine

is operating when the short occurs the engine may stop operating and will not start.

 

NOTE: 1 GM EFI ignition system failure open or shorted, driver will flag EST 1 fault.

 

NOTE: 2 TPS must see 5% throttle then back to 0% to flag IAC fault.

 

NOTE: 3 2-wire sensor open will read sensor Hi on scan tool.

 

NOTE: 4VDC PWR Low - if shorted or no voltage engine will not start; if VDC PWR voltage

falls velow 22 volts will set sensor faults.

 

NOTE: 5 Shift Switch - will activate code when engine rpm are above 3500 rpm and 40%

load.

SERVICE MANUAL NUMBER 36 GENERAL INFORMATION

90-864573 FEBRUARY 2002 Page 1A-27

 

Warning Chart (continued)

Fault Smartcraft Gauges            Audio Alarm       Available Power          Description

Steer CKT Hi                                       No                         100%         Short or high voltage

Steer CKT Lo                                       No                         100%                           Open

TPS1 CKT or Range Hi              Yes 2 Bp/min                   90%         Short or high voltage

TPS1 CKT or Range Lo              Yes 2 Bp/min                  90%        Open or low voltage

Trim CKT or Range Hi                Yes No                           100%      Open or high voltage

Trim CKT or Range Lo                Yes No                           100%                          Short

5 VDC PWR Low 4                            Yes 2 Bp/min                  90%         Short or low -                      

                                                                                                          engine may not start

MAT Sensor Hi                             Yes 2 Bp/min                  90%   Open -default to --32  

                                                                                                                    degrees F

MAT Sensor Lo                            Yes 2 Bp/min                  90%    Short -default to --32

                                                                                                                     degrees F

Shift Switch 5                                       Yes 2 Bp/min                  90%               Open Circuit

 

NOTE: If any 5v sensor becomes shorted to ground the engine will not start. If the engine is operating when the short occurs the engine may stop operating and will not start.

 

NOTE: 1 GM EFI ignition system failure open or shorted, driver will flag EST 1 fault.

 

NOTE: 2 TPS must see 5% throttle then back to 0% to flag IAC fault.

 

NOTE: 3 2-wire sensor open will read sensor Hi on scan tool.

 

NOTE: 4VDC PWR Low - if shorted or no voltage engine will not start; if VDC PWR voltage

falls velow 22 volts will set sensor faults.

 

NOTE: 5 Shift Switch - will activate code when engine rpm are above 3500 rpm and 40%

load.

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I installed mercury vessel view mobile when i had a beep every minute to find out what it was. (totally recommend installing it) It took 10 minutes and its about $250. It told me i had a o2 sensor giving an alarm.(even tells you which one) I changed the 02 sensor but couldn't get the error to go away, found out from mercury that i had to have someone come clear it on a computer. Did that and went away, but the mobile view sure saved me wondering what was going on and give you all kinds of other data

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Thanks for the info guys !

As I was pondering this I haven't found anywhere that states what causes a steady (timed at every 60 seconds) fairly short beep. The engine doesn't need to be running, just as long as the key switch is turned on. I comprehend 2 beeps , I do know what a constant beep is.  Just wanted to hear someone say they had one beep a minute. I'm looking into the mobile view, Thanks. I'm also interested in buying a code reader. Any suggestions on that? 

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9 hours ago, HeyBoatman said:

Thanks for the info guys !

As I was pondering this I haven't found anywhere that states what causes a steady (timed at every 60 seconds) fairly short beep. The engine doesn't need to be running, just as long as the key switch is turned on. I comprehend 2 beeps , I do know what a constant beep is.  Just wanted to hear someone say they had one beep a minute. I'm looking into the mobile view, Thanks. I'm also interested in buying a code reader. Any suggestions on that? 

Could the depth alarm on the depth finder be sounding. One long beep per minute has me stumped too. W

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Thanks , the depth alarm does make an awful racket when it's first powered up in conjunction with the engine starting. I thought that I stopped it by pressing the on/off button but who knows, it still be on. I'll disconnect power to the Depth Finder.  

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