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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 04-29-2015, 08:53 AM   #1
Graham Sadler
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INPA error “113 over voltage at clamp 30” in shadow memory

My E46 convertible roof functions correctly when the engine is off but will not function with the engine running.

INPA reports error “113 over voltage at clamp 30” in shadow memory, which I believe from my research indicates over charging error at the battery?

I have checked the voltage while the car is running and I am getting 14.45 volts and nothing connected to the roof will work (I.E. windows dropping etc)

If I switch on all the lights including fog lights the voltage then drops to 14.2 volts while the engine is running and everything works fine with the roof.

And help with this will be greatly received.
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Old 04-29-2015, 11:18 AM   #2
taylor192
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Voltage regulator issue?
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Old 04-29-2015, 11:19 AM   #3
Phoenix330ci
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I usually see it the other way. Low voltage on 30 but it still works.

I'm assuming that it is something in the top module (CVM) prevention getting the higher voltage to keep it from damaging the module.

Sounds like your alternator is over charging the battery. I think it is supposed to be 14.0 or 14.1.
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Last edited by Phoenix330ci; 04-29-2015 at 11:21 AM.
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Old 04-29-2015, 07:08 PM   #4
dknightd
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A typical charging voltage should be 13.8-14.2. 14.45 is a little high. But I'm surprised it makes you top complain. Live and learn. You are probably measuring DC voltage - it is possible the voltage spikes higher temporarily. I'd probably put in a new voltage regulator. Let us know how to resolve this. Thanks
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Old 04-30-2015, 02:48 AM   #5
Graham Sadler
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Thank you all for your input,

That is my next step to change the regulator, but I just couldn’t believe that the module would be so fussy with the voltage.

I have now ordered a new regulator and will post the results.

Thank you all again for your help
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Old 05-02-2015, 06:50 AM   #6
Graham Sadler
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I have changed the regulator and the voltage had dropped slightly to 14.35 volts so I have still got the same problems.

I have also tried a different battery which has made no difference to the voltage being generated.

Not sure what to look at next?
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