MZD Connect and disconnecting the battery

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hsdejong
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MZD Connect and disconnecting the battery

Post by hsdejong » Thu Sep 06, 2018 11:40 am

When you disconnect the battery for months, does the MZD Connect system lose its settings such as favorite destinations (navigation) or safety settings?
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jtonline
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Re: MZD Connect and disconnecting the battery

Post by jtonline » Thu Sep 06, 2018 3:27 pm

No it should be fine. According to TAX in this thread Disconnecting vehicle battery, he had his battery negative terminal disconnected for 5 months with no ill effects when reconnected.

Note that Mazda say that when disconnecting/connecting the negative battery cable, you need to make sure to perform it smoothly in one action, avoiding any repeated momentary contact to the battery pole that causes a spark. Not following this caution may cause an excessive voltage variation to the Body Control Module (BCM) in the vehicle, leading to electrical system malfunction(s).
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hsdejong
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Re: MZD Connect and disconnecting the battery

Post by hsdejong » Thu Sep 06, 2018 7:11 pm

I am going to put my car in the garage for at least three months.
If I leave the battery connected, it will be flat after about a month and a half, due to the parasitic average current of around 55 mA.

It's good to read that when the battery is disconnected the settings are not erased, because setting all the radio and destination favorites in the system took a long time.
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hsdejong
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Re: MZD Connect and disconnecting the battery

Post by hsdejong » Mon Feb 18, 2019 10:59 pm

jtonline wrote:
Thu Sep 06, 2018 3:27 pm
No it should be fine. According to TAX in this thread Disconnecting vehicle battery, he had his battery negative terminal disconnected for 5 months with no ill effects when reconnected.
Confirmed :-)
After I had reconnected the battery after three months, no settings were lost.
In the Applications section, the next maintenance date was advanced by three months.
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st3v3cx-3
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Re: MZD Connect and disconnecting the battery

Post by st3v3cx-3 » Tue Feb 19, 2019 11:22 pm

hsdejong wrote:
Mon Feb 18, 2019 10:59 pm
jtonline wrote:
Thu Sep 06, 2018 3:27 pm
No it should be fine. According to TAX in this thread Disconnecting vehicle battery, he had his battery negative terminal disconnected for 5 months with no ill effects when reconnected.
Confirmed :-)
After I had reconnected the battery after three months, no settings were lost.
In the Applications section, the next maintenance date was advanced by three months.
Thanks for posting that update. It is so useful when an owner / original poster can confirm the answer given was exactly as anticipated.
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hsdejong
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Re: MZD Connect and disconnecting the battery

Post by hsdejong » Thu Mar 07, 2019 2:30 pm

hsdejong wrote:
Mon Feb 18, 2019 10:59 pm
After I had reconnected the battery after three months, no settings were lost.
I forgot to mention:
After reconnecting the battery I had to initialise the Tyre Pressure Monitoring System (TPMS).

From the Mazda Owners Manual:
In the following cases, system initialisation must be performed so that the system operates normally.
  • A tyre pressure is adjusted.
  • Tyre rotation is performed.
  • A tyre or wheel is replaced.
  • The battery is replaced or completely drained.
  • The tyre pressure monitoring system warning light is illuminated.
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