7d (edited) • Your Own Faults. Videos/pics
2014 VW Transporter
Came in with EML on and P040100 EGR insufficient flow. Found a TSB on DDTSB for this fault and gave some know good and bad readings to check at the EGR plug.
Pin1 5v feed. Tested at 5v
Pin2 should be 3.6v Tested at 12.3v
Pin3 Ground Tested 0v
Pin 4 empty
Pin5 0.8v. Tested 0.6v
Pin6 4.3v Tested 12.3v
Bad EGR pin 2 0v
Pin 5 0.6v
Pin 5 tested the same as the bad data but its pin 2 & 6 as they are twisted so that indicates CAN lines to me. Also scoped and no waveforms at all
Same voltage when it’s unplugged and when running Pin 6 goes with to whatever the battery is charging at.
When left with ignition on engine off it will all by itself drop to around the correct voltages then spikes up to 12v again
Code clears out and reading are still the same
Pin 2 & 6 go to the motor according to Alldata
Unfortunately customer had to take the van today but is rebooked for next week and my next step was to voltage drop test and load test the wires
I suspect possibly a short to ground but any help/ advice would be appreciated as I could be scratching my head on this one!
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2014 VW Transporter
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