Lexus RX400h energy monitor.

[mickw322]

Lexus RX400h energy monitor. In the past 2 weeks on 3 occasions when starting the car the energy monitor does not respond, it only shows the status but with no bars. After approx. 1 minute everything comes to life, green bars, functionality etc. It always starts, the 12v Battery is now 4yrs old any ideas? 

I also have acquired another RX400h recently and the energy monitor is not fully functional (it was working on purchase), No controls for the Nav, AC, Climate, audio controls on Nav screen, when pressing buttons I get "The external system is not connected" and "Check connection of the air conditioner".

I went into the service check mode and only EMV was OK, all the others (Navi, Camera, Radio etc) had NCON, so I cleared all the codes and now there is only EMV OK in the menu. I have checked the fuses, disconnected the Battery and is being fully charged atm.

I can change all the audio controls vol, bal, tre etc from the head unit but most if not all the Nav screens functions are not working, yet I can get into the menu using DISP + 3 on/off sidelights procedure.

Anybody else had "The external system is not connected" and "Check connection of the air conditioner" errors?

Could it be that the 12v batteries on both cars are beginning to fail or is it something more sinister.

I posted on the RX forum and was told to post on the audio/video forum as I may get a better response. Thanks.

[mickw322]

Just disconnected the Battery for 24hrs and fully charged, reconnected Battery and took these pics.