Greetings to all of You.
In two weeks, my Mazda CX30 will be a one year old and until this Monday I have not had any kind of problems.
As you can guess, three days ago my battery died. No lights, no dashboard indicators, nothing at all.
I consulted the dealer - connecting/charging the battery with cables was the next logical step.
After 3 minutes all systems booted up by themselves with many alarms on the dashboard, but I could not start the engine.
In total, the battery was charged for more than 15 minutes. All dashboard errors (network, engine ignition, key not recognized) remained all the time and I could not start the engine.
I called a towing service that transported the vehicle to my dealer for a full inspection and (first regular oil change) service.
Next day I was informed that the battery was totally dead, temporary replacement was installed and I will get a new (original) batter in a few weeks - the warranty is valid for 12 months.
The serviceman was interested in what had happened.
I explained to him that although the initial answer "because of the cold (-8?!)" that I received as an explanation - I could not agree.
Тhe Internet is flooded with the same problem and I narrowed down the source of *my* problem and we had a nice discussion.
- Leaving the FOB in the car for more than 15 minutes (something I did regularly) while washing the car, drains the battery very rapidly.
- Active FOB key is not allowing the car to go in sleep mode and all systems remain ON.
- Opening and closing the doors are adding to the battery drain problem.
-Cumulative awake time reaches 30 min.
I want to find the exact battery drain-scenarios, sleep modes as I prefer to feel comfortable while I drive/sitting/ waiting in my car.
* I disabled FOB ("Hello I am here") constant signal transmission.
* I disabled Mazda Advanced Keyless Entry. (Settings/vehicle settings/door locks/keyless auto-lock.)
* Yes I will "manually" enter and start the car - until I learn the all circumstances that are draining my battery.
1. I highly recommend this video - parasitic drain test on (Mazda 2021) car including testing to see/prove how the car reacts to the key Fob .
2. Two Mazda internal PDF`s - 2022 - I don't know if they are still valid - 2022.
a) PDF "Low Battery Risk. Start Vehicle to Charge 12V Battery" .
APPLICABLE MODEL(S)/VINS
2021-2022 Mazda3 (Japan built) with VINS lower than JM1BP******500044 (produced before November 6, 2021)
2021 Mazda3 (Mexico built)
2021 CX-30
b) I Highly recommend this PDF - DISCHARGED BATTERY AFTER VEHICLE IS PARKED FOR MORETHAN 8 HOURS
Page 2: The vehicle network starts to wake-up at the moment any side door is opened in order to increase the start-up speed of
electrical components and the network awake cumulative time count begins by the customer doing any one of the
following wake-up triggers:
• Open any door(s)
• Unlock doors
• Open liftgate
• Depress brake pedal
• Push start/stop button
• Other operations that wake-up the network
Page 5: • The system will enter Sleep Mode when the vehicle network cumulative awake time reaches 30 min.
c) PDF ENGINE NO START DUE TO LOW BATTERY VOLTAGE
*I will update my post, with additional information, soon.
