The Toyota Landcruiser Owners Club

Crispin · Posted: Sat Aug 15, 2009 16:14 Post subject: Various current information for 120

As part of my quest in building a car PC, I wanted to know what the various "states" were and how much current they each used. Reason being, I wanted to see how bad the extra 150ma of the PC in standby is relative to the car "in standby"

I disconnected two batteries (earth) and hooked up my trusty multimeter between negative and the earth strap. (I was lucky on two occasions, it will become clear)
The engine was 9/10 on it's way to normal operating temperature as I had been out driving.

Here are the findings:

Alarm On

210mA
After 5 minutes: 20mA
Unlock
Spike of 12A
Interior lights on: 1.8A
Interior lights off: 80mA
Lock
Spike of 16A

Unlock, drivers door open
1.8A
After 30 seconds: 270mA

Ignition / Acc
Radio Off: 2A
Radio On (BBC Radio 1): 2.5A (Note: When tuned to Radio 4, there was no noticeable increase despite the audio content having far more culture)

Ignition / On
6A continuous (Note: Only as I turned it on did I think "*beep* *beep* *beep*;glow plugs". After going back to meter, it was still happy. Guess they did not need heating or my meter would have been cooked)
Winding window down: 6A
Winding window up: 12A (This surprised me)
Sunroof opening: 12A
Sunroof closing: 12A
Sunroof Tilting: 11A

All the tests were repeated and figures pretty much the same. Obviously the usage is not that of the individual part but the drain on the batter. i.e. the window does not use 12A to close.

I was surprised at the standby current of only 20ma. I really was expecting more (not sure why. Not like the size of the vehicle dictates the standby current Smile

)

Anyway, maybe this will be of interest to some, otherwise pretty mundane reading. Neutral

It does though point out that my hope of leaving a pc on standby and consuming 150ma is a tall ask.
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Cheers,
Crispin
Have Snorkel, Will Swim

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Rick · Posted: Thu Aug 20, 2009 9:44 Post subject:

Crispin
If you left a PC on standby in your car, wouldn't some chav scum just break in and steel it?
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Rick

Crispin · Posted: Thu Aug 20, 2009 10:14 Post subject:

Nuclear Chicken · Posted: Fri Aug 21, 2009 12:09 Post subject:

What about a small solar panel to keep the battery trickle charged?
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'04 KDJ120R LC5. Died 17th Dec 2010. RIP.

Crispin · Posted: Fri Aug 21, 2009 15:50 Post subject:

jojo1 · ** Joined: 13 Jul 2008 Posts: 77 Location: Leicestershire

Hi Crispin,

You need to contact Lawrence on the 70 series forum. He's the guru! He built my car PC 5 years ago and it's never failed/crashed once after innumerable Sahara trips.

Happy trails,

Jojo