THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
| WARNING!!! JB4 can damage your DME/ECU if handeled improperly |
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| 05-14-2015, 08:57 PM | #1 |
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WARNING!!! JB4 can damage your DME/ECU if handeled improperly
To all current owners of a JB4!
The JB4 installation manual has been updated with the following warning: "Also be very careful when working with the BMS USB cable as it sits close to the battery rail which is a live +12v connection. Allowing the USB cable to touch the +12v connection WILL damage the JB4 and MAY damage the TMAP sensor wiring requiring the ground bypass at the bottom of the guide to be performed. Wrapping a piece of cloth tape over the battery rail connection and/or USB connection will help prevent accidental damage"
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| 05-14-2015, 10:29 PM | #2 |
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What goes here?
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This has been a known problem for the longest.... This is not unique to the JB4... just don't short the positive terminal... No need for such an alarming post.
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| 05-14-2015, 10:46 PM | #3 |
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If this alarming post can prevent just ONE other person from the same fate as me - then there is a very good need for it.
I am a hobby tuner so don't expect me to know a USB cable can cause this much damage. Back in July 2014 when I installed my JB4 this was not highlighted as a risk.
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| 05-18-2015, 02:55 PM | #4 |
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It's my understand that this will basically blow the ground on the tmap sensor but wasn't aware of actual DME damage as a result. Will keep in mind.
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| 05-19-2015, 08:41 PM | #7 | |
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Quote:
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| 05-19-2015, 09:28 PM | #8 | ||
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Quote:
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