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Little Megger
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8 Posts
Discussion Starter · #1 ·
Hi
Recently bought a mk2/2000 and wondering why the temp. gauge and fuel gauge doesn't return to zero when the ignition is turned off...?!
When I start the cold engine, the gauge returns to zero and "warm up" normally. A new temp. sensor didn't make any change on that.

Any ideas?

Per J / Denmark - and new to the forum
 

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MEG Corporal
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1,387 Posts
Engine temp, and fuel gauge stay where they are when you switch engine off, then when you switch on next day, it re-sets itself to the correct position.
 

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Little Megger
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8 Posts
Discussion Starter · #4 ·
tanda said:
Engine temp, and fuel gauge stay where they are when you switch engine off, then when you switch on next day, it re-sets itself to the correct position.
Hmm..., yes apparently, but what's the point? When you switch off something electical, it usually "stops working"...

Thanks for the answers both.

Per J.
 

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Registered
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974 Posts
the trip computer has perminate live going to it so it keeps the time correctly even when everything in the car is turned off, both wires to the temp sender come from the back of the trip, so if the trip has perminate live then so does the temp sensor
 

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Little Megger
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8 Posts
Discussion Starter · #7 ·
[quote name=pete's blue mk2]the trip computer has perminate live going to it so it keeps the time correctly even when everything in the car is turned off, both wires to the temp sender come from the back of the trip, so if the trip has perminate live then so does the temp sensor[/quote]

So the gauges should drop to zero if the battery is disconnectet, but they don't...

Per J
 

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Still waiting to Wii
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2,710 Posts
zap said:
pete's blue mk2 said:
the trip computer has perminate live going to it so it keeps the time correctly even when everything in the car is turned off, both wires to the temp sender come from the back of the trip, so if the trip has perminate live then so does the temp sensor
So the gauges should drop to zero if the battery is disconnectet, but they don't...

Per J
just becasue teh trip computer has a premanent live doesn't mean that everything connected to it is always live. It will simply kick the guages off when the ignition is turned off. The gauges are not spring loaded nor are they going to try and get the temp readings when the engine is off (pointless anyway, no water circulating so it wouldn't be an accurate reading) so the gauges will simply fall where it is naturally going to by physics.
 
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