spod
New Member
Posts: 5
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Post by spod on Apr 4, 2024 12:41:56 GMT
I have a fault code that pops up often and annoyingly lights up the engine check light.
It's the usual Static current too high but it has supply voltage, terminal 30 12.5v, Terminal 15 off.
Does terminal 30 refer to the offending fuse and item?, if so is there a schematic of the fuse box that will help me work out what it's complaining about?
and yes I do have a dashcam it's VWs own dr-s1-vw that from what I can make out was a Japan only unit but I did get it to speak in English, it records with ignition off and on from different feeds.
The car came with it already fitted, front and rear and being an 'intermittent' issue I'm not keen on unplugging the dashcam for a few months but if I can trace it back to fuse terminal 30 I can do something with it straight away.
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Post by dv52 (Australia) on Apr 4, 2024 20:27:32 GMT
spod : Hi. No - "Terminal 30" is NOT a fuse - it's the designation for a type of Battery voltage in the industry Standard DIN 72552.
In this case T30= Battery rail voltage that is unaffected by the ignition switch (so, the permanent Battery voltage)
And, T15 = Battery rail voltage that is switched with the ignition switch
So, in respect of your words "it has supply voltage, terminal 30 12.5v, Terminal 15 off." - this doesn't appear to be a problem because it means that the battery voltage is 12.5 Volts when the ignition is switched-off (i.e. engine NOT running, so NO voltage contribution from the alternator).
Note: the measured 12.5V is electrically "downstream" of the actual battery - this means that this voltage will be slightly less than at the battery posts (because of the volt-drop that occurs within the car's wiring loom and fuses).
Don
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spod
New Member
Posts: 5
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Post by spod on Apr 5, 2024 11:14:34 GMT
Thanks for the wealth of info.
It ultimately doesn't fix anything though but I can now conclude it's a drain over and above what the car expects whilst the ignition is off.
I can only assume this is the VW dashcam which isn't going to drain the battery anytime soon but also cause the engine check light.
If I look at the fuse box inside the car and work out where it's wired too now, is there a 'better' area to wire it into that won't cause the "Static current too high" message or is this check at just before the battery level so no matter what I do it'll potentially always trigger at some point?
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Post by dv52 (Australia) on Apr 5, 2024 22:00:39 GMT
spod : Ok - I'm not sure if you are familiar with the term "parasitic drain". It's the thing that causes the battery voltage to deplete. There can be lots of reasons for parasitic drain - the most important of which is a correctly operating alternator. I suggest that as a first attempt at diagnosing this problem - you check the battery post voltage with the engine running AND full headlights AND air-conditioner operating. Although the T30 voltage in your first post doesn't appear to be concerning, it might still be worth checking periodically (especially if it's old). When you have established that the battery charging/battery capacity is OK - there is a process for methodically checking each fuse for parasitic drain. The process is NOT particularly difficult - but it does involve careful step-by-step discipline (and you need a multi-meter).
If you want to pursue this option - I suggest that YouTube is your friend!
Don
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