Anyone here has a fin's nut? Part No.: BAN66 6 A3Z
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Anyone here has a fin's nut? Part No.: BAN66 6 A3Z
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Had my 24th month pms at Mazda Makati and for the 3rd time the experience was not satisfactory. I just found out this morning that the mechanic have accidentally spilled some corrosive fluid at the engine bay. It could be the fluid from the battery when they did the battery test:
Imagine if that fluid spilled on top of the car's body paint!
I also saw a bit of brake fluid spill near the brake fluid reservoir. That stuff is also corrosive!
And this is my concern when having the pms at the casa where you can't see what the mechanic is doing. I can't see if they're doing the job the right way.
For a simple pms activity, I stayed at the casa for almost 5 hours!
I just can't wait to be free from the yojin "free" pms so I can look for a better shop, a trusted mechanic or just diy. 2 more pms and I'm done with availing these "quality" pms from the casa.
Hobo method of replacing the car battery: connect another battery to the car's battery terminal connections before removing the car battery. I opted for this approach instead of replacing the EFB battery while the engine is running (not recommended due to the huge risk of damaging your car's electronic components).
This hobo method will keep the car's ecu powered, hence no risk of losing the istop configuration and infotainment system settings. Just be careful not to short circuit the battery connections (battery positive connection shouldn't touch the car's metal body, negative terminal).
A safer approach is to use a portable battery jump starter that comes with a powerbank. As long as there's power supply to the car's battery connection while removing the battery, those ecu settings will remain intact.
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Really? Probably for the infotainment system but for other ecu settings like the istop?
I don't want to risk of having to reset my M3's istop settings and/or encounter all sorts of ecu warnings like what happened to another car (ford fiesta), so I used this approach just to be sure.
Thanks Travs for the confirmation!
I saw Scotty's vlog on a better way of replacing the battery that wouldn't result to various error codes (I've experienced that with the lemon Ford Fiesta). I'll try it out with the fiesta which is due for another battery replacement.
How to Replace a Car Battery (the Right Way) - YouTube
Not sure about i-Stop, but reset ECU settings? The settings/map are in a flash ROM (like your USB stick). It doesn't get erased everytime power is disconnected. Otherwise reflash/remap/ECU tunes like OVT wouldn't work. Imagine having to ask them to flash you again just because you replaced a battery.
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i wonder,
will this work?
get an appropriate 12 volt battery source (a small car battery?) and connect it to the car via the cigarette lighter.
turn the key (i hope meron!) to "acc".
remove and replace the car's battery.
remove the gadget (above).
voila?
if one removes one's car battery on a regular basis, perhaps one should have ninja install his battery access gadget to the car, which one can use to piggyback the external battery ..?
otherwise,
jojo's battery-on-a-metal-mesh-garden-chair will work fine.
Last edited by dr. d; December 29th, 2019 at 10:09 AM.
Obviously those ecu settings will not get erased on a battery disconnect/discharge. Those settings are stored at some storage device somewhat similar to what you mentioned.
What I'm referring to is the ecu keep alive memory. I reckon this is where the istop runtime data are stored.
Anyway, my post on sharing about the safe/proper way of replacing EFBs is to help fellow Mowners on how they can do it by themselves so that they don't have to deal with dodgy ways of replacing it (e.g. engine running while replacing the battery) or getting charged with hefty fees by the casa (₱2128 by Mazda Makati) or a battery dealer shop.