Mantass

Okay so we changed 12v Battery, remote works much better , for the rest we'll see 😅😅

On 7/10/2021 at 11:08 AM, OldTrout said:

Job now completed. I glued the temperature sensor on with a dab of Plumbers Gold.

I had to make a little male to male adaptor to fit the vent tube. There may have been one somewhere in the extremely thorough packing but I could not find one.

I tried to keep 12V connected as I changed the battery but I knocked a lead off. The cabin was locked and with the new battery installed I could not get in using the remote and had to use the physical key. Settings for seats, connected key fobs and windows were lost but fortunately all stuff in entertainment system - phone numbers, locations, radio station etc. - were retained.

Will this one be good for 15 years I wonder?

The temperature is a refinement no previous car of mine has had. What is controlled by the temperature of the battery?

John 

 

 

So, you said that key fobs stopped working with new Battery, and you entered with physical key. So what happened next? I mean how to connect fobs to unlock car and start engine? 🙂 because tomorrow we are planning to change Battery.

So when I turn on ignition it shows 12,2 but after second it drops to 11,8. If I hold/flash headlights it drops to 11,6-5. When I start the engine it goes up to 13+ , then after let's say 2 minutes 14,3. Key doesn't work properly , I mean it takes longer to unlock or start car. On my Lexus is250 key unlocks car straight away . Is250 has new Battery and refurbished alternator. Just for clarity , gs450h that we are talking about is my father's it's 2008. Is250 is mine. 

   I don't understand why obd2 scanner doesn't show any errors on gs450h

21 minutes ago, ColinBarber said:

That is odd. Once the vehicle goes into 'Ready' mode the hybrid system will start supplying the vehicle's 12 v power - it should be outputting up to 14.4 v to charge up the 12 v battery.

I suspect your 12 v battery is unable to supply any reasonable load and is dragging down the vehicle's 12 v system. With the vehicle turned off, measure the voltage of the 12 v battery and then flash and hold your headlights on - I suspect the battery voltage will severely drop, indicating the battery is failing. 

Before starting 12,1 after starting 11,8 and then later 14+. Later tonight or tomorrow I'll check it with more attention (now I'm at work). And will try flashing lights aswell . 

Thanks for help

Today before starting vehicle it showed 12,1. After I started it it changed to 11,8. 

At some point I noticed when I turned on mirror heating , radio lost signal. When turned off mirror heating , radio started working again. 

When Driving hear and feel little weird kicking noise and feels less power. 

Does 12v Battery have any connection with hybrid system?

Hello, so in the family we have Lexus Gs450h . On dashboard it shows air pressure icon, and red triangle ,in the middle is written check system. Air pressure light at the start flashes and then stays on. Remote keyless doesn't unlock the car so smooth as before. I believe it might be problem with 12v Battery. When I try to scan it for problems with dedicated scanner or app it never finds any faults .

Any thoughts?