PaulE

Hi, I am about to be on my third 12v battery so am now familiar with that side but do not know where the HV disconnect plug is. There appears to be very little on the series 1 hybrid as I have been searching for info for some time now. I have seen a series 2 diagram which appears to show the HV plug under the centre console storage box but it isn't there on the series 1. I found a photo on a website of a Malaysian repairer which might be the plug but it doesn't give the location and it doesn't look like the ones on the Prius. If any members know where the plug is and what it looks like I would be grateful.

Hi, the vehicle was fine until December when I couldn't us it for a few weeks and now having issues with it - the 12v battery may have gone bad as charging it will start the petrol engine but not the hybrid system- am waiting for a new Yuasa battery to come from back order and hoping this will fix the new issue.

Hi, When ordering from Tayna did they require your VIN No. ?

Hi James, at the moment I am not using the vehicle so I didn't get the battery yet- will be getting one after new year. I haven't decided which one- I didn't buy the Panasonic as it was £400. I might buy a cheap one and the Numax 005R (£70) seems to be a fit and I think this was the battery I had on when I purchased the vehicle. Can you let me know how you get on with the Yuasa as this might be the one in the end. I did fit the last battery myself and have had it on and off to charge it. It is awkward but you get used to the process. I have a battery tester now and a good charger so will be keeping up with the charging. I have bought a mini ODBC lead and hoping to download a copy of Toyota Techstream (if I can get it to work) to see if I can keep a closer eye on any issues. I wonder if anyone else is using this app. thanks Paul.

Hi Chris, I was under the impression that the 12v battery (the one at the back of the centre console inside) started the petrol engine as when the battery has been down I have started the vehicle using a Noco booster pack connected to the remote positive terminal and the chassis under the bonnet. I have charged the existing battery and the vehicle starts and runs on the petrol engine but appears to be in limp home mode as the hybrid system appears not to be working.

I decided to bite the bullet and pay the price for a new battery rather than risk the old one being no good even after charging- series 1 doesn't have the temperature monitor- I am hoping this will sort out the vehicle and that the problems aren't more serious. I thought about using the charging port but wondered if that would cause any issues with the electrics. I raised the Yuasa AGM alternative as E-Hybrid.com (they are on Ebay) says the Panasonic is in short supply and may not be available until new year some time. Will be using the charger from now on.

E- Hybrid have come back to me and said the battery I ordered had the vent on the wrong side and the high cost is due to there being very little stock from the manufacturer. The AGM battery from Tayna is only £299 but is it compatible? I couldn't use the vehicle for some weeks due to getting covid and some other issues and the 12v batteries seem to go downhill fast on the hybrid if not used regularly. I should have bought a charger sooner.

Hi, been having trouble with the vehicle 2005 Hybrid and I think the 12v battery is faulty having tried a battery tester Topdon BT20- trying to replace it with the same one Panasonic S55D23R which is the battery I have had on for a year now and was the recommended replacement bought from a company called E-Hybrid.com (on Ebay) - found their Ebay post and paid £259.99 today - had an email back saying this isn't the correct battery and directing me to another post for exactly the same battery now £399.99 - both posts have the same OEM No. and my vehicle is on their compatibility lists. I have emailed back to complain and await their reply. My post is that I have found a Yuasa battery Yuasa HJ-S55D23R-B (MDS battery.co.uk and Tayna.co.uk) which appears to be a replacement but is an AGM type which I gather requires a higher charge rate and I wondered if the Alphard has sufficient charge rate or do I need to bite the bullet and pay through the nose. The Yuasa requires 4 amps charging and AGM types may require a higher voltage to charge 14.6v to 14.8v as against lead acid 13.8v to 14.4v. I couldn't find the spec for the Panasonic. You would think getting a battery would be easy. I have the old battery on charge with a Noco Genius 5 which is supposed to repair batteries- has anyone used this charger on a bad battery? Any advice welcome. thanks

Hi, I didn't have to do anything when I replaced my battery. I found the engine started straight after the battery was replaced but the "warning sign" issue was still there but after switching off and removing the key then restarting everything was ok. Had the same issue when the battery was flat and I jump started the vehicle, all ok after switching off and restarting. Incidentally I have a remote start on my Clifford alarm key fob and I get warning signs after starting which go away after pressing the brake pedal. Do you press the brake pedal when starting? Hybrids seem to have a few oddities. Have you checked the battery connections? I had trouble getting the nuts to tighten due to the tight spaces - also I did put vaseline on the terminals which prevented tightening and had to clean it off- didn't realise that with the battery inside the vehicle there wasn't much chance of corrosion. Still learning!

Hi, is it the correct battery for the vehicle? It needs to be a start stop type battery. Hybrids appear to be awkward if you don't have the right 12v battery or don't keep it up to the mark. When I had a battery issue my dealer obtained the manufacturer's recommended one from Tayna.co.uk.

I believe you should have a bluetooth connection so you can connect your phone or pad- I have never used it but my dealer gave me a device that plugged into the 12v socket and played music from his phone- I think there is a video on the forum showing how to connect to bluetooth. Cheers

Hi, the 12v battery on my 2005 hybrid is in the centre console between the two front seats- the access cover is at the back of the console. See picture attached. Can't answer the other queries although I think you have to keep the existing hifi due to having info on the hybrid system and the camera connections if you have front, side and rear cameras.

Unless the donor battery is tip top then you are still likely to have trouble. Have you tried a booster pack (the positive connection is under the bonnet under what looks like a fuse box then connect the negative /earth to the nearest part of the chassis which is a nut to the left of the positive connection). I would try this before spending money on a repair garage if you can. You could take the old battery to a garage to get it checked out before taking in the vehicle. I had to replace my 12v battery with a Panasonic S55D23R (advertised as for a Toyota RAV 4 Hybrid) from a company called e-hybrid.com- if you make an enquiry give them your vin no. to get the correct battery-it needs to be a start/stop battery.

Hi, I am not a Techie but I have a 2005 hybrid and the only couple of times I had starting issues was first when the 12v battery had failed and needed replacing with the correct start/stop type of battery (there is a post about this on the forum in my name) - the vehicle would jump start but then cut out when put into drive- replacing the battery cured the issue. The second was when I hadn't used the car for a couple of weeks or so and the 12v battery was down (it did start with a power pack ok). Have you used the vehicle regularly or has it been left unused for a period of time , do you have the correct 12v battery and how old is it? Is it a different issue to the one I have described?

Hi, There are some posts on the Forum about Hybrid 12v battery- it is important to have the correct battery that incorporates start stop technology as a standard battery will ultimately fail as it did to me. Check out the other posts. cheers

I used a Noco GB50 to jump start my 2005 Hybrid E4- worked well- bought from Halfords.

Many thanks will download them asap

Hi - see link attached - some photos which might be useful on this website https://Fixmycar.pk/toyota-alphard-hybrid-e-four-2/ scroll for the pics

Hi, mine shows 3 bars but I have had 4 very occasionally going down long steep hills- I imagine the vehicle used some battery power so it might not get 4 bars much.

I have found a part translation of the auction report- see pics attached - hope this helps

Hi, Before buyinhg my Alphard I paid for the Car VX report and found the same "Problem Found" against recalls- I emailed Car VX querying this and they replied that " According to Toyota, all the recall works were done, so you have nothing to worry about." so you can query this with them. Also there is a page on the forum which allows you to check recalls- follow the instructions and substitute your frame type and no (chassis no.)

Hi, I have atatched a couple of photos from the internet showing where the battery is located for a hybrid- you have to remove the rear curved shape cover which is accessed from behind the front seats- that is from the side door- it is very awkward and you have to push the centre seats well back. The cover clips off so use a special trim removing tool if you have one but it may come off by pulling on the "side bumps" on the cover- it's also a devil to get back on. You have to remove the vertical bar first and wiggle the battery out a bit to get to the terminal nuts- the battery is a very snug fit so make sure you have the right battery and must be a stop start type- an ordinary battery will likely fail after a while which is what happened to me- I did put a post on a while ago which gave the battery I had to get (for a 2005 E4). Don't forget to reset the door window switches - see Youtube - good luck

Hi, I have one on the 12v battery cover of my hybrid- no idea what it does if anything but appears to be wired into the loom. Mine doesn't light up.

When I had my 12v battery problem the dash showed the headlight symbol on all the time and the HU was dimmed although the headlight was off. Changing the battery fixed the issue.

Hi, if you manage to re use the 12v supply can you let us know how you did it- I thought of using it to power my dashcam.