Mazda CX-70 Forum banner
Cancel
Create thread New Garage Forums

CX-60 BATTERY DRAINING after up to 4-8 Hours in Parked Condition..UPDATED.

Jump to Latest
32K views 68 replies 17 participants last post by  pawkaster  
#1 · (Edited)
There is a brand new TSB (Technical Service Bulletin) Mazda Dealer advice for ALL CX-60's sold in Europe and UK.

TSB NUMBER: R003/23 Dated February 22nd, 2023.

All (some) CX-60's made from the Start of cars Production up to the DECEMBER 22nd 2022 Production Date in Japan.

From VIN Number (Last 6 Digits) 100001 To VIN 123074.

There are Separate CAUSES with two Separate VIN Number ranges:

THE CAUSE:

Cause 1. VIN 100001 To VIN 123074 DECEMBER 22nd 2022 Production.
[Cars with Driver Personalization System].
If the push button start is pressed multiple times in a short period of time without having completed the driver recognition by the driver personalization system before, the vehicle systems may not go to sleep mode even after the ignition is turned off.

Cause 2. VIN 100001 To VIN 108896 AUGUST 29th 2022 Production.
B. [All CX-60 vehicles]
Due to the improper control software of the Electrical Supply Unit (ESU),
the vehicle systems may not go into sleep mode even after the ignition is turned off.

Therefore BECAUSE the car is not going into sleep mode (or off) a parasitic draw down of your cars Batteries electrical capacity occurs and basically flattens your CX-60 car battery.

THE FIX:

A reprogramming of the cars BCM (Body Control Module) and the cars ESU (Electrical Supply Unit) with your Mazda Dealers in house and online MDARS (Mazda Diagnostics and Repair Software) Application.

Both modules have since been modified with updated Software during current Mazda Japan production, but for the current owners within the above VINS the cars MUST BE Software updated @ your Mazda Dealer with MDARS.

There are no parts to be renewed, ONLY the Software Update that can ONLY be done by your selling Mazda Dealer Service Department and ONLY applies to cars with the above issue.

I post this information to HELP Mazda owners, this is very new and most Dealers would not be aware of such a TSB, IF you wish to inform your Dealer please be polite and tell them the TSB Number and Date and repair procedure with MDARS.

You 'may' get a Service Advisor telling you this was done in your last Service, well obviously IF you are still having this issue then politely tell them this TSB is all new and has not been available to Dealers before as a known software fix.
Either ask your Dealer if it can be done in next Service, Or if you are having immediate issues with Battery Drain, ask if car can be booked in for this fix under warranty ASAP.

Again, I want to stress Mazda Japan likes the Customer to complain to the Dealer of a particular issue, unfortunately some Dealers still don't run MDARS for updates during Service unless owner complains of an issue.

I would politely says that If you are experiencing this problem with your cars battery after only a few hours of your car parking with a dash warning of low battery charge signal when you go to start car then you should tell your Dealer of this complaint ASAP, remember Mazda and or your Dealer will not perform a fix unless you have a problem, so
advise them you are experiencing low battery charge warnings on dash.

Cause 1. VIN 100001 To VIN 123074 up to DECEMBER 22nd 2022.
For BCM reprogramming (vehicles with Driver Personalization System only):
The BCM is software updated with MDARS Dealer programming application.

Cause 2. VIN 100001 To VIN 108896 up to AUGUST 29th 2022.
For ESU Reprogramming (All Vehicles):
The ESU is software updated with MDARS Dealer programming application.

BCM Calibration File numbers are available to Dealer in Bulletin and vary on cars with PHEV or except PHEV for
'Main' or 'Sub' File Name.

ESU Calibration File name KR9P-66S07-D for ALL CX-60 Models.

There is an UPDATE for CX-60's with the 12 inch IC Display, see Page 2 of this Thread, Then PLEASE See Post #39 on Page 2 of this thread.
 
#2 ·
NOTE this TSB was first publicized in January 2023, however,
Another cause has been added with the related sections having been changed accordingly.

OBVIOUSLY If your Mazda Dealer has rectified your Battery Drain issue Before and you are Still experiencing Low Battery Warnings then this Bulletin Does apply to your car and politely inform your Mazda Dealer that new causes have been found and are now rectified, can you book my car in as the Battery drain issue persists.
 
#4 ·
Yup this happens to me, I thought I had left the car on when it happened!

but hopefully it wont be an issue on the diesel, so not bothering getting any further issues fixed on my PHEV as all being well, it will be gone by mid April and will be someones problem.
 
S
#7 ·
Why don’t you expect this being an issue on the diesel? As far as I know it’s draining the 12V battery, not the high voltage one.

I’m quite surprised by this kind of assumptions for the diesel being less troublesome than the PHEV, but I would not be so sure. It may come from the dealers trying to keep the sales going by, as the PHEV is getting bad reputation from owners comments.

Sure you will not have low electrical range issues, nor noise between 50-70kmh from the rear drive shaft on the front drive diesel. But most issues could be common to all CX-60’s.

My dealer tried to persuade me to go for the diesel. I hope I don’t regret ignoring him and getting the PHEV! Time will tell…
 
#5 ·
ASH8 said:
There is a brand new TSB (Technical Service Bulletin) Mazda Dealer advice for ALL CX-60's sold in Europe and UK.

TSB NUMBER: R003/23 Dated February 22nd, 2023.

All (some) CX-60's made from the Start of cars Production up to the DECEMBER 22nd 2022 Production Date in Japan.

From VIN Number (Last 6 Digits) 100001 To VIN 123074.

There are Separate CAUSES with two Separate VIN Number ranges:

THE CAUSE:

Cause 1. VIN 100001 To VIN 123074 DECEMBER 22nd 2022 Production.
[Cars with Driver Personalization System].
If the push button start is pressed multiple times in a short period of time without having completed the driver recognition by the driver personalization system before, the vehicle systems may not go to sleep mode even after the ignition is turned off.

Cause 2. VIN 100001 To VIN 108896 AUGUST 29th 2022 Production.
B. [All CX-60 vehicles]
Due to the improper control software of the Electrical Supply Unit (ESU),
the vehicle systems may not go into sleep mode even after the ignition is turned off.

Therefore BECAUSE the car is not going into sleep mode (or off) a parasitic draw down of your cars Batteries
electrical capacity occurs and basically flattens your CX-60 car battery.

THE FIX:

A reprogramming of the cars BCM (Body Control Module) and the cars ESU (Electrical Supply Unit)
with your Mazda Dealers in house and online MDARS (Mazda Diagnostics and Repair Software) Application.

Both modules have since been modified with updated Software during current Mazda Japan production, but
for the current owners within the above VINS the cars MUST BE Software updated @ your Mazda Dealer with MDARS.

There are no parts to be renewed, ONLY the Software Update that can ONLY be done by your selling Mazda Dealer Service Department and ONLY applies to cars with the above issue.

I post this information to HELP Mazda owners, this is very new and most Dealers would not be aware of such a TSB,
IF you wish to inform your Dealer please be polite and tell them the TSB Number and Date and repair procedure with MDARS.

You 'may' get a Service Advisor telling you this was done in your last Service, well obviously IF you are still having this issue then politely tell them this TSB is all new and has not been available to Dealers before as a known software fix.
Either ask your Dealer if it can be done in next Service, Or if you are having immediate issues with Battery Drain, ask if car can be booked in for this fix under warranty ASAP.

Again, I want to stress Mazda Japan likes the Customer to complain to the Dealer of a particular issue, unfortunately some Dealers still don't run MDARS for updates during Service unless owner complains of an issue.

I would politely says that If you are experiencing this problem with your cars battery after only a few hours of your car parking with a dash warning of low battery charge signal when you go to start car then you should tell your Dealer of this complaint ASAP, remember Mazda and or your Dealer will not perform a fix unless you have a problem, so
advise them you are experiencing low battery charge warnings on dash.

Cause 1. VIN 100001 To VIN 123074 up to DECEMBER 22nd 2022.
For BCM reprogramming (vehicles with Driver Personalization System only):
The BCM is software updated with MDARS Dealer programming application.

Cause 2. VIN 100001 To VIN 108896 up to AUGUST 29th 2022.
For ESU Reprogramming (All Vehicles):
The ESU is software updated with MDARS Dealer programming application.

BCM Calibration File numbers are available to Dealer in Bulletin and vary on cars with PHEV or except PHEV for
'Main' or 'Sub' File Name.

ESU Calibration File name KR9P-66S07-D for ALL CX-60 Models.
Click to expand...
Hi, where do you get access to thees TSBs? :)
 
B
#11 ·
In six-cylinder engine is augmented by a small M-Hybrid Boost electric motor sandwiched between it and the standard eight-speed automatic transmission, same setup identic in PHEV, just smaller in R6.
Lots of improvements reported by dealers, are incorporated into the production line every 3 months.
 
#12 ·
Yes as i said above different software, engine and gearbox automation, and your last point is incorrect however if you have evidence to ai substantiate that claim im more than happy to see it.

Just to disprove your theory Daniel, my brand new diesel has not had the door sound proofing done and Ill know what else hasn't been done next week.
 
#31 ·
Technically just the rears, but dealers are doing the front as well now.

Basically, with sound, if it gets blocked at one point, it will find another way in. With the rear doors being done and not the front, the sound transmitted through to the fronts, so most dealers do all four now. Well, at least the dealers I have used do.

I am looking at doing some insulation on the wheel arches as they havent really done any and the arch liner isn't the best quality.
 
#34 ·
Hi CX-60 guys and gals (all Mazda Owners),

For those who have issues with Key Fob (proximity key) draining your cars Battery overnight because car and keys are too closed together in carport then this is a cheap solution for you, or your disposable Keys/Fob battery is draining flat.

I purchased one Faraday Box PU Leather Shielding Storage Unit with 2pcs Pouch Sets For Key Fob from eBay and can confirm this isolated my Phone from the outside world. When we tried to ring the phone placed inside the Faraday Box all that happened was a short Dial and then dis-connection from caller would drop off (cut out), also available from Amazon and is actually good quality (well made).

I have not yet tested with Car KeyFob (RFID) yet but I am certain the same results being the KeyFob goes to sleep when Fob is placed inside the Faraday Box and therefore your car keyless module also does the same.

eBay Faraday Box and Pouches


Image
 
#38 ·
BTW, in distance there are many variables, like the strength of fob coin battery, if weak then transmission distance is less.
The type of wall constructions in the building where car and keys are stored, heavy steel construction can mean more signal barrier between car and fob, and then other electrical or electronic devices around building and or close to car.
Applies to any make of car, there is no perfection.
 
#39 ·
Hi All,
There is an Update but Actually All NEW TSB just out for EUROPE and UK Dealers and CX-60 Owners with the 12 Inch IC (Instrument Cluster Display), it is SEPARATE to the TSB of this Thread but thought Keep this one together.

R056/23: CX-60 (KH) - Drained Battery after long Time Parking 12 inch Display. July 24th 2023.

See Below...
 
#40 · (Edited)
Applicable Model: CX-60 (KH) with 12" instrument cluster (or called the IC).
ONLY APPLIES to 12 inch IC Display and NOT the 7 inch IC Display Unit.

DESCRIPTION

Some vehicles equipped with 12" display type instrument cluster may exhibit a drained battery after long time (4 hours or longer) parking.
NOTE: Please use EPC to identify instrument cluster type (a 7” or a 12”).

CAUSE
Due to improper control software of the instrument cluster (or IC), the vehicle system may not go to sleep mode even after the ignition is turned off.

NOTE: Added by me, PLEASE ensure that all CX-60 Key Fob(s) are well over 4 metres in distance from your CX-60 so the Fob(s) and then the cars Computers will go to sleep, if they remain on it the data transfer and "vehicle ready mode" it will drain your cars Battery and car will not start. Use a FARADAY Box or similar Pouch designed to block signals between your cars Key Fob and the Cars PC.

MASS PRODUCTION CHANGE
Control software of the instrument cluster has been modified.

Applicable VINS from Start of CX-60 Production to October 11th, 2022.

Europe
(L.H.D. & UK Specs.) JMZ KH **** ** 100001 113554 - Oct. 11, 2022

REPAIR PROCEDURE is via your MAZDA Dealer Only with MDARS.

Reprogram the IC with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS).
 
#41 ·
AGAIN... I will post this warning.....

Please do not go to your Mazda Dealer and say that you Read here in this Forum that there is a new TSB just out on how to fix my Battery Drain issue.

It does not work this way as not all owners will suffer this Issue as they have a different CX-60 car usage and or car storage routine @ home or @ work, or your CX-60 VIN and Production date is newer than what is listed here.

Mazda warranty and repair policy is You the Owner MUST complain that you are having car main engine Battery issues like Dash Warning Lamps and or slow engine/starter turn over like my Battery is close to flat and or holds no charge, etc.

Then if you are getting a poor response from Mazda Dealer you can quote correct TSB Bulletin Number RO56/23 of the 24th July, 2023.

I and others here post this information so you guys as owners are informed with ammunition only if needed. :)
 
#42 ·
hi,
I come back to this problem of "low 12V battery" which despite the many updates made (including the one concerning this problem probably?).

Even today after an immobilization of 2/3 days I systematically have the alarm when the doors are opened.
Is there a solution today? Has Mazda definitively resolved this issue?

THANKS
Pierre 'from France"
 
#45 ·
PeteCanto said:
hi,
I come back to this problem of "low 12V battery" which despite the many updates made (including the one concerning this problem probably?).

Even today after an immobilization of 2/3 days I systematically have the alarm when the doors are opened.
Is there a solution today? Has Mazda definitively resolved this issue?

THANKS
Pierre 'from France"
Click to expand...
It seems to be different on every car I am afraid. Some have it solved by a new battery, some found it was the alarm, some found it was a software element of how long the car remained active when doors were opened etc, some found it was the DPS system not allowing the car to shut down after use.

Mine, touch wood , has been solved with a new battery and a reprogramming of the DPS system after six weeks in the dealership under investigation. I know others have not had it solved and are either having their car replaced or rejecting it and going elsewhere.

If you've had all the recalls and software/firmware updates done, have you had the battery swapped for a new one? How long has the dealer investigated?
 
#43 ·
Get a faraday case or shield to block signal from keyfob to car.
Or always move fob a long way from car when home.

You see people now expect "proximity keys" so car will open on demand, therfore car is always communicating with key fob as they are too close in range and Never goes to sleep when car is not in use.

Cue, the whingers...all modern cars work in similar way.
 
#44 ·
Faraday pouches don't offer anything that six flights up and 500metres backwards doesn't .

The battery drainage for me was not related to any proximity keys, and imo its a very basic way of looking at a serious battery drainage fault on many CX60s throughout Europe. I actually haven't found a single owner who has had the Low 12v Issue being caused by the distance of their key in relation to their vehicle.

I don't believe anyone is a 'whinger' for wanting their 50k car to start when required personally.

In fact, the Mazda key is not a true proximity key as it does not unlock the car when in radius, it requires touch on the handle sensor for it to unlock, unlike say some BMW ones where you walk up to it, it unlocks automatically with no manually input/circuit completion neccesary. This reduces the possibility of it being to blame for battery drainage.
 
#47 ·
There has been an update of VINS this TSB issue applies to...

First Publication Date: 24/07/2023

BULLETIN NOTES
Revision Note: SUBJECT VIN range has been updated.

Applicable Model: CX-60 (KH) with 12" instrument cluster.

DESCRIPTION
Some vehicles equipped with 12" display type instrument cluster may exhibit a drained battery after long time (4 hours or longer) parking.
NOTE: Please use EPC to identify instrument cluster type (7” or 12”).

CAUSE
Due to improper control software of the instrument cluster, the vehicle system may not go to sleep mode even after the ignition is turned off.

MASS PRODUCTION CHANGE
Control software of the instrument cluster has been modified.

SUBJECT VIN & PRODUCTION DATE RANGE
Spec.VIN RangeProduction Date Range
fromtoFromtoProd date
Europe
(L.H.D. & UK Specs.)		JMZKH**** **100001114208-Oct. 17 2022


The FIX is MDARS Software Update @ Mazda Dealer Only, Just complain Battery is Draining, Warning Lights, etc, Your GOOD Mazda Dealer should just Plug car into MDARS and it will Show/Tell him what updates to install.
From Memory this one takes about 5 minutes to do once laptop connected.
 
S
#48 ·
Ash8 - Do you have a TSB number or Mazda reference for this update? My car is currently undergoing diagnostics for this problem - that the dealer seems to think is something that hasn’t happened to anyone before. I would like to tell him what the TSB is.
 
S
#52 ·
I think so. I left the car at the Mazda garage for about a week. After a lot of investigation, the battery was put on a trickle-charger over a weekend, and afterwards the low 12v battery warning had gone. I was told that there was a software fix coming out that would solve the problem and they would sort it once the update arrived. (I think this was in November, but there's still no update yet).
The low 12v warning did reoccur in December, so copying the garage, I put the battery on trickle charge until the charger indicated that the battery was full after a couple of days. The low 12v battery warning was still on (so I knew it was a spurious warning), and in order to try to reset the computer logic, I disconnected the battery (-ve) for 30 minutes and then re-connected it. The low 12v battery warning had gone and I've had no problems since.
If you have this problem too it could be worth trying the same!
 
P
#53 ·
So the problem is not resolved:) You will have to re-charge your 12v every other month, since for some reason car is not capable of re-charging it properly by itself. There is probably a major design fault, i.e. too small 12v battery, or car is not prioritizing 12v charging over main battery charging. I wouldn't want to re-charge my 12v battery at home every month on a new expensive car:) Had a lot of new cars, including hybrids, and none had the same issue.

Did you dealer investigate for possible phantom battery drainage? I mean, why 12v is being discharged and not fully charged?
 
S
#59 ·
The dealer didn't say what he'd done, other than tell me about the trickle-charge.

The car was sitting doing very little in December, as it was bought mainly for towing a caravan, which I didn't do that month. I'm sure that as the car relies so heavily on computers, there's a lot of parasitic drain on the battery if I just leave it standing doing nothing. There was with my old car if I left it standing for more than a couple of weeks.
 
#60 ·
I have a Bluetooth battery monitor coming in a few days to put on the 12v battery for a month or two. I haven't had any issues with low battery warnings coming up, however when I have manually tested the voltage has been on the low side at about 12.3 volts with everything off, and when the PHEV main battery is active or charging I've noticed the charge voltage for the 12v has only gone up to mid 13 volts when I have been monitoring. Definitely not high enough for battery long jeverdy. In my opinion mid to high 14's would be more appropriate as a peak absorption voltage.
I'll be interested to see what it does.
 
P
#62 ·
Indeed, mid 13 volts is too low. Battery should charged at 14.4V, otherwise it won't charge properly. That might be the cause of the issue. Can you check charging voltage while driving on ICE with depleted main battery? ICE should be charging both main and 12v batteries. I am wondering what will be charging voltage for 12v in this case. If it is lower than 14.4V, then issue is clear. Also, if charging voltage in EV is mid 13v, then DC-DC convertor doesn't provide proper voltage which might be software issue or faulty DC-DC convertor.
 
Mazda CX-70 Forum
posts
13K
members
2.5K
Since
2021
2025+ Mazda CX-70 Community and Owner's Club - Join the conversation about the new Mazda SUV
Full Forum Listing
Explore Our Forums
Mazda CX-60 Discussion Forum Mazda CX-70 General Discussion Forum New Member Introductions Mazda CX-70 Pictures Member Classifieds