Dash display

[BrianHo]

Good morning, I am in the process of buying a 2001 lexus 300rx it has been parked up for over 2years, the remote key does not operate,the car starts but no dashboard display can you help 

[steve2006]

Hello Brian and welcome to the LOC.

Was the car jumped started?
Where has it been stored for the previous 2 years?
Have you replaced the key fob Battery?

[BrianHo]

Thanks for your help,it was jumped by the previous owner, since then I have charged Battery and changed key Battery, windows don't operate 

[AntonyP]

Hi Brian, which Battery was charged- 12v or traction? After 2 years the 12V Battery could be sulphated and not charging properly. I would suggest vendor replaces it regardless. If 12v is relatively OK drivers window should lower and raise, when fully closed hold for about 5seconds to reset. Do the same for all windows individually at their respective doors. Once reset all windows should operate from drivers position. As for the instrumentation it may be the 12v again. My GS450h wont do anything if the 12v Battery has less than 11.7v/11.8v. I was doing low mileage and they were only lasting 2 to 3 years tops! Plenty of advice on other threads about replacing the 12v Battery for a fraction of the dealership price. Paul

[Herbie]

1 hour ago, AntonyP said:

Hi Brian, which battery was charged- 12v or traction?

It's not a hybrid.

[ColinBarber]

If the dash isn't working, nor the windows, then possibly one of the main fuses has blown. I wonder if jump cables were connected the wrong way around, or is there the possibility that rodents have been chewing wiring in the engine bay?

[BrianHo]

7 hours ago, steve2006 said:

Hello Brian and welcome to the LOC.

Was the car jumped started?
Where has it been stored for the previous 2 years?
Have you replaced the key fob battery?

Hi Steve, I've been down to the car today,a bit of progress gone through the fuses got the passenger window to close, the red door open indicator shows on dashboard, yellow side indicators flash, I've interchanged relays , I'm sure it something soft, the bloke who had it before said he drove it before the problem with the dashboard, last thing the obd port is dead 

[ColinBarber]

11 minutes ago, BrianHo said:

last thing the obd port is dead 

pin 16 should have +12v on it even with ignition off. It is fed via a 7.5A obd fuse and the 140A ALT fuse.

[steve2006]

I’ll second that Colin, the Alt fuse often blows with jump starts or of course reverse polarity.

If you want to locate the fuse Brian to check it’s located in the engine bay fusebox. It’s not your normal plug in type but much larger with a clear plastic cover so easy to see if blown. A bit of a pig to replace as it is screw terminals are accessed from underneath.

Link to fuse box diagram fuse is number 47 in engine bay 

https://fuse-box.info/lexus/lexus-rx300-xu10-1999-2003-fuses

[BrianHo]

Just like to say, thanks for helping me out with the lexus 300rx it now has a dashboard display, I can start to give it some TLC 👍

[steve2006]

What was it Brian, the alt fuse or something else?

[BrianHo]

Morning,it was the alt fuse 140 amp , I can now start to do more jobs,before I take it for MOT 👍