Unit failures check battery - Humminbird 140c Fishin' Buddy

Supplemental Restraint System (SRS) diagnostic trouble code (DTC) 51-XX indicates an internal failure of the SRS unit (computer). There isn't much to the diagnosis of this code; the procedure consists of erasing the codes, cycling the ignition switch, and if DTC 51-XX, 52-XX, 53-XX, 54-XX, 55-XX or 58-XX is detected, replace the SRS unit. It's important to note that if the vehicle was in a collision prior to this failure, there are many other components that need to be replaced along with the SRS unit depending on which airbags and/or seat belt buckle tensioners deployed. Regarding VSA DTC 61-01, an OBDII scanner capable of accessing live sensor data should be using to inspect the VSA "BATTERY" parameter ID (PID) and compared to battery voltage read with a digital multimeter. If battery voltage is low for both, the battery and charging system should be inspected. If it's only low for the VSA unit, the VSA unit should be updated with the latest software. If up-to-date, the VSA unit connector should be inspected for loose terminals and power supply circuits checked for high resistance. If OK, the VSA unit should be replaced. You can read more here: https://www.yourmechanic.com/article/how-to-replace-an-abs-control-module-by-robert-kulp

check power supply make sure connector not damaged wire known to break so no charge to unit ---battery failure -not charging --or switch failure

ups units run a computer directly from mains power and from a battery when mains power is cut.
some run the computer through the battery at all times and so use the battery as a surge protection
points to check on your unit
is the by pass system being damaged in the surge protection section
is this requiring the batteries to provide power but not being charged at the same time
Is the power consumption exceeding the battery rating ( pc, printer, monitor , modem etc exceeding the out put of the ups

Generally that indication implies generator failure. Generator failure can come in multiple forms. A faulty ground will cause the generator not to charge and potentially burn it up. A severed phase wind (remember, your alternator is really a three-phase generator with a six pulse front end rectifier set) will cause the light to intermittently come on along with weak charging output. A voltage regulator failure will cause zero field current in the rotor. A brush failure will also cause a generator failure light to come on and stay on. A rectifier failure (any of the six) will cause the generator not to charge properly and turn on the MIL and generator failure indicator (looks like a battery). The condition of the battery can also cause generator failure, if the battery is defective (buckled plates, weak electrolyte, low water, etc.) it will place a very high load on the generator continuously, causing it to 'full field' the rotor which can cause the rotor to overheat and fail. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly. Do not attempt to verify output of the generator with the battery terminal leads disconnected.

If generator failure is indeed the cause, find out why. Generators rarely fail. When they do, it usually is caused by poor ground connections, corroded battery terminals, high continuous loads, electrical faults and poorly-wired ancillary equipment, such as head units, amplifiers, inverters, etc. Always check all these out when replacing the generator. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly.

Since you are having a new battery and alternator the charging circuit of the electronic charging unit is a possible suspect.
All what is required is to check the charging voltage when the engine is started, if there is no increment of voltage when the engine runs the alternator then the connection from the alternator must be checked. Check the output from alternator, check the relay box which contains the charging unit. It can be a failure of the rectification or the stabilising circuit, the unit must be replaced.

Make sure with a good test if the battery on the camera has the VOLTAGE AND CURRENT that is required for the camera to switch on, Sometimes only the voltage is present on some battery which will not allow the camera to switch on.
if this is confirmed then there is fault in the terminals of the camera battery holder, fault in the main controller electronic unit.
If technically able to open you can remove to check within for any switch contact failure, barring which it can be failure of the controller unit.

Possible failure of the microprocessor or the control unit in this section. If there was any reason that the battery had leaked out into the unit , then open and wash with methy spirit , clean and set back.
Check the trail of the main battery voltage to the main board the fault can be here.

Hi cyloverruk,
See even after a power failure it should not have gone Off since its battery should have holded it On. So it means that the battery would have lost its life. It is not possible to get the battery even under warranty, because it does not get covered under warranty. So the best way is to replace it with a new battery.

Please leave me comment, if you need further assistance

good luck with your fix.
have a nice day.

Please rate this solution
Thanks
Regards
Arul

Not sure why your unit would reset to factory settings, it's usually the thermostat settings that control the unit and resets when you have a power failure. Most thermostats have a battery in then to power the thermostat during a power failure. They usually only maintain the power from 15 to 30 minutes to maintain your settings, before defaulting back to factory settings. After every power failure you usually have to replace the batteries.

It could be yes, but not always. It can be RAM failure, battery failure, Add-on card failure. first thing to check is its power source, then RAM, Add-on card, checking also it power button. Sometimes non booting unit is only due to dirty contact.

I usually check its power source, then clean the RAM with soft eraser, if that doesn't help I try to check other add on card. Next is it drive I disconnect them then try to power up without the drive if it can able to POST.