[Demun]

Member	Date	Location	Vehicle Detail	Incident	Recovery required?	Dealer Involved?	Battery Discharge SSP applied
@OERA1 (Mexico)		At home washing car	2021, CX-30 Grand Touring FWD	Low Battery warning	No	No	Not known
@OERA1 (Mexico)		At home washing car	2021, CX-30 Grand Touring FWD	Low Battery warning	No	No	Not known
@savcom (UK)	9th Apr 2021	At home washing car	2020 CX-30 Skyactiv-X MHEV GT Sport Tech	Car wouldn't start	No	Yes	Update applied to correct battery discharge after incident
@digitaldoc77 (USA)	May 2021	Home, next day after picking up the car.	2021 CX-30 Preferred AWD (2.5NA)	Low battery alert (Numerous times)	No	Vehicle subsequently checked, and no issue found.	Reportedly delivered with all updates applied.
@almazda (UK)	May 2021	At home or work. Happens regularly. Having door open triggers warning	2021 CX-30 GT Sport Tech Skyactiv G Automatic.	Low battery alert (this remains in place until car is driven again)	No	Dealer checked and confirmed battery OK. No error codes. Dealer stated it was a normal warning and that it didn't mean battery is about to die.	Reportedly delivered with all updates applied.
@paulf (UK)	Started Mar-20	At home	GT Sport Tech X, Auto	Three "failures to start"	Jump-starts required	Yes. Battery replaced following the first event. No fault found sign off after the second event.	Yes. Mar-21 as part of service
@Susan (Canada)	March and April 2021	At home	2021 CX30 GT AWD	Regular 'Low Battery' alarms. One flashing console episode	No recovery required. Car taken for a drive instead.	Not involved with incident but have been to dealership more than once. Battery checked each time and all was ok	Not known. Complaint made to Mazda Canada.
@DaveHenrie (USA)	March and April 2021	At home	2021 C-30 Preferred	One failure to start and several 'low power' warnings, usually after washing car.	No recovery required (able to jump-start)	No
@SoxFan	Feb'21 Mar'21 Apr'21 May'21	At home At home At home At home	2021 CX30 AWD Turbo Prem+	Numerous low battery warnings	No No No No	No Yes and No No No	Unknown
@SoxFan	2nd Apr 2021	Rockville, MD	2021 CX30 AWD Turbo Prem+	failed to start	yes. Mazda app reported interior light on. light was verified not on. Battery fully discharged	Mazda Roadside Assistance	Unknown.

 

[Demun]

Took delivery of car on 27 July.

30 July Low Battery Alarm comes on - spoke to dealer who said probably due to vehicle not being used whilst in transit to dealer and that the alarm will go away after the car does a few trips so went home and put CTech charger on to battery.

3 Aug and 7 Aug did a few runs of about 150 Km and on 21 Aug had alarm again.

24 Aug car went in for first service and dealer said bring car in again next day so that they can check it. Battery checked to be 725 cca (should be 520 cca) so all good.

30 July went back in to dealer because alarm still coming up. They replaced battery.

31 Aug drove 250 Km then back the next day.

3 September alarm again so went to dealer and car now booked in for further tests 7 September.

Today I noted a potential problem where the battery negative lead is coonected to the chassis (top of suspension tower). The female thread is painted on my car so I ran a tap through it and applied some Alminox to the bolt tread to improve conductivity as I have had this type of problem previously. Shut the bonnet (hood) and openned door - no alarm!

This may be a cause of the problem - I'll wait until after the dealer has checked it out again and, if no action, wait to see how it goes for a week or two.

To be continued, Dino

 

[Demun]

Dino

How do you want me to log the info above? If it's the chassis connection like you say, then it's not strictly the battery drain issue (which was the root cause for many members).

G'day Savcom,
The vehicle has been taken back to the dealers service dept and a software patch has been applied which turns the MRCC off after the ignition is turned off.
I saw the document they have regarding this that confirms this is the cause of the low batt alarm problem.

The painted thread is not the cause, just an anomaly that I thought may have contributed to the problem due to my past experience with electrical problems with vehicles (I'm a retired radio communications tech).

I have added more detail under another heading on this subject and, further to this, have had no depletion of the battery over the past 4 nights - I had connected a Matson battery monitoring device to the battery about 2 weeks ago and check voltage daily (I bought mine at Supercheap).

The tech at the dealership also showed me that the low voltage alarm sense point is set at 12.5 volts.

My car has a build date stamp of 7/21 on the Australian plate and don't know the actual build date leading me to have concern that someone (Mazda Australia as the importer, the manufacturer or the dealership) is not applying the new software (firmware) to new cars being delivered. Seems there is a communication problem in the system.

I'm not sure how to get the information out to new car buyers about ensuring their new car has been re-programmed to correct this problem.

Cheers, ..

 

[Demun]

You are correct that you need to idle the engine for at least 5 minutes to re-set the the timer. Of course, it is not enough to charge the depleted battery, it is simply a nominal number arbitrarily selected by Mazda for a timer re-set. The timer simply counts 30 cumulative minutes of the car electronics being in the awake state between successive engine runs. When this time is reached the "Low battery risk" warning is generated irrespective of the 12V battery's actual state of charge or state of health, as you found on your new car. It is a pity that Mazda pushed out such poor and not well considered software, but there are indications that an update is on the way for Q1 of 2022. Still great that you contacted Mazda Canada. The more owners push them the more likely we are to get this update earlier.

I am still having the annoying alarm, even after the latest software update.

Loaded some items into the boot/trunk and this activity bought it on.

Ran the car for about 7 minutes (drove down the road and back) and no more alarm.

This running of the engine for >5 minutes seems to me to negate any fuel savings generated by the stop/start function and wonder if this impacts upon the fuel economy figures or, if it is even taken into account. It may be a case of mis-representative advertising similar to that of the Volkswagen fiasco.
Because the dealers have been advised to disable certain functions when displaying vehicles to prospective customers certainly looks like it to me.

Dino