332: Parasitic Draws Are Just Network Problems In Disguise
About this episode
Exploring the evolving challenge of parasitic battery draws, this episode reveals how many modern cases are actually network communication issues in disguise. The host shares insights from recent mobile diagnostics, emphasizing the importance of analyzing vehicle CAN bus networks to identify modules that stay awake and drain the battery. By shifting focus from traditional current measurements to network diagnostics, technicians can pinpoint problematic modules more efficiently. Real-world examples from Ford and Lincoln vehicles illustrate this approach, along with tips on using scopes and serial bus decoders to track network activity and module identifiers.
Today on the show I share my thoughts on diagnosing modern parasitic draw concerns and how so many seem to shift/overlap into network diagnostics. So much so that I have shifted my process and mindset when diagnosing them.
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Lincoln Mkx
"Same thing on this Lincoln. This is a 2016 or 17 Lincoln MKX. But, you know, similar network architecture as t..."
Ford Escape
"... a module that are keeping it awake? I had a Ford escape recently where the button for the steering wheel ..."
Ford Transit
"...ick thing, but you can do it. I also looked at my Ford Transit Connect, which is 2012. Actually, we have several..."
Lincoln Mkc
"...so know the ID. If I see a telematics module on a Lincoln MKC waking up the high speed can bus three, I have th..."
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