gswindale 2 Posted May 11, 2020 Share Posted May 11, 2020 My wife has a 2015 Petrol Yaris where the Battery has run flat whilst on lockdown. We have a trickle charger, but I am slightly unsure as to where to connect the cables to to enable it to charge up the Battery. Any advice will be gratefully received. Quote Link to post Share on other sites
mrpj 170 Posted May 11, 2020 Share Posted May 11, 2020 I have a trickle charger/maintainer connected to my Battery (2014 1.33l petrol Yaris). CTEK 5 Amp version. Positive(red) of charger to positive (red) terminal on Battery 1st. Negative (black) of charger to the Battery tray to inner wing securing bolt 2nd. I will take a picture if needed. It is advised to connect the -ve to chassis rather than directly to the Battery in case of sparking. Lead acid batteries emit hydrogen gas potentially! If the Battery has become really flat and depending on how much expect it to have deteriorted considerably. 1 Quote Link to post Share on other sites
gswindale 2 Posted May 11, 2020 Author Share Posted May 11, 2020 Hi, A picture would be great as I also can't see how the cover comes off the red terminal to connect the charger? Quote Link to post Share on other sites
CPN 154 Posted May 11, 2020 Share Posted May 11, 2020 21 minutes ago, gswindale said: Hi, A picture would be great as I also can't see how the cover comes off the red terminal to connect the charger? The red plastic cover unclips and hinges upward... Quote Link to post Share on other sites
mrpj 170 Posted May 11, 2020 Share Posted May 11, 2020 If the red plastic cover is the same it just pulls up to reveal the terminal. The small protrusion at the front will help. Pull up on that. If I remember correctly it only hinges towards the rear. I have used eyelet permanent connectors, not crocodile type clips. That bolt was convenient, but any unpainted chassis earth should be fine. CPN beat me to it re the cover. Quote Link to post Share on other sites
gswindale 2 Posted May 19, 2020 Author Share Posted May 19, 2020 Just to say a quick thanks for your help guys. Battery appears to have charged, but will find out properly once we can get it and about a bit more! Quote Link to post Share on other sites
mrpj 170 Posted May 19, 2020 Share Posted May 19, 2020 2 hours ago, gswindale said: Battery appears to have charged, but will find out properly once we can get it and about a bit more! Which, following the advice from Toyota would not achieve. i.e. just "run it while parked"! Good you got it sorted. Quote Link to post Share on other sites
CbStevie M 0 Posted Thursday at 08:52 AM Share Posted Thursday at 08:52 AM Good morning all. I have a new Yaris Hybrid and the 12v Battery is flat. I've removed and charged the Battery and will refit it presently but does anyone know if it's possible to connect a trickle charger to the jump start terminal in the fuse box for the occasional top up? I have a smart charger and it would be convenient to do it this way. Many thanks. Quote Link to post Share on other sites
Gerg 407 Posted Thursday at 10:50 AM Share Posted Thursday at 10:50 AM This question has cropped up, with various models of hybrid, plenty of times. The official Toyota instruction is that you shouldn't attach a Battery charger at the point you mention, you probably are aware of this! I've not heard of anyone causing a problem by doing so. I imagine that Toyota will err on the side of caution with their recommendations, not least because they have no control what Battery charger you are going to use (e.g. brand, size, type, model, country of origin, age, DIY-made(!) etc.). So they are interested in not being held responsible for people connecting an unknown item onto the car's electrical system, whilst all its ECUs etc. are still attached. And they remove that risk by giving a blanket 'do not do it'. The cable to the Battery from the charge point is connected to the fuse box battery feed, and that is fused at 100 or 120 Amps, so that's not a problem. My opinion is that a 'smart' charger used as per its instructions should be fine. But I'm always interested in other's thoughts... Where is the Battery on the new Yaris, by the way, is it still under the back seat? Quote Link to post Share on other sites
GeoffH 1 Posted Thursday at 04:02 PM Share Posted Thursday at 04:02 PM In another thread, I have mentioned that the jump start terminal is only "live" on the front part. The rear part is not conductive. So make sure that the +ve croc clip from your charger, is connected so that the part with the cable is in contact with the front part of the terminal. Do not connect a charger to this terminal if you have just tried to start the car, as the hybrid system may have partially "woken up" and will be looking for lots of Amps to fully start it. You will probably blow the fuse in your charger. Your charger should also be one that supports AGM batteries. Geoff Quote Link to post Share on other sites
Mikw 41 Posted Thursday at 09:32 PM Share Posted Thursday at 09:32 PM 12 hours ago, CbStevie M said: Good morning all. I have a new Yaris Hybrid and the 12v battery is flat. I've removed and charged the battery and will refit it presently but does anyone know if it's possible to connect a trickle charger to the jump start terminal in the fuse box for the occasional top up? I have a smart charger and it would be convenient to do it this way. Many thanks. Sorry for asking this, but what are the circumstances that lead to the 12v Battery going flat? Quote Link to post Share on other sites
GeoffH 1 Posted Friday at 06:39 AM Share Posted Friday at 06:39 AM 9 hours ago, Mikw said: Sorry for asking this, but what are the circumstances that lead to the 12v battery going flat? If you have time, read the comments on the following discussion. https://mag.toyota.co.uk/coronavirus-toyota-hybrid-car-maintenance/ Basically, the 12v batteries are not powerful enough, and there is too much drain on them when not using the car every couple of days. 1 Quote Link to post Share on other sites
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