Changes by last author:
Changed:
| * 1000 Ohm works with most audi gauges. It might be something software / config related. Please publish mcd / mct dump (and what firmware you use). Check other outputs (maybe 2 functions configured to same output?) |
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* 1000 Ohm works with most audi gauges. It might be something software / config related. Please publish mcd / mct dump (and what firmware you use). Check other outputs (maybe 2 functions configured to same output?)
** Link to dumps below - look down 10 cm :) |
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** flyback checked out with ohm-meter before and after install.
** curcuit is thru wiring harness (O2 sensor plug two wires joined) - fuel pump relay (two terminal 87 circuits) - to ECU |
| ***OK I will do that first always. As a note, all problems are listed in order of occurance, tach and fuel pump relay problems existed before FET damage, and "cutting out" was after. |
| Is it possible that somehow ECU is powered down while injectors are still powered ? Or flyback wire does not go to injector common directly but via some relay or other indirect method ? (measures low ohm, but disconnects for short time in certain cases like powerdown, that can damage injoutputs to fail later). |
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Is it possible that somehow ECU is powered down while injectors are still powered ? Or flyback wire does not go to injector common directly but via some relay or other indirect method ? (measures low ohm, but disconnects for short time in certain cases like powerdown, that can damage injoutputs to fail later).
*** Yes - Possible. ECU controls Fuel Pump Relay via Inj Ch4. *** Relay may have possible Diode-shutdown delay? *** Fuel Pump Relay's other 87 circuit supplies injector power *** note OEM wiring .pdf below, flyback circuit is on pages 3of9, and 7of9 |
| *** injectors measure 12 Ohm. |
| *** Yes - will email the contact information to webshop. |
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Factory Wiring .pdf |