Audi A2 Conversion: Difference between revisions

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Revision as of 19:07, 6 February 2022

On this page we describe the conversion of an Audi A2 1.4i petrol to electric propulsion. We will use the following components:

  • Nissan Leaf 24 kWh battery pack with original BMS
  • Toyota Prius Gen 2 (2004-2009) transaxle with matching inverter
  • openinverter Prius Gen2 motor controller
  • openinverter main board running stm32-car (VCU in ECU enclosure)

Pin mapping

We start out by mapping out useful pins of the original wire harness

ECU

The ECU has two connector slots, a smaller one with pins 82-121 and a larger one with pins 1-81. Here we map out pins useful to us VAG wire color codes:

VAG wire color codes.png
ECU pinout 1.4i (AUA, BBY)
# orig function our function wire color
1,2 GND
3 permanent 12V ro
4 ignition 12V
5 Lambda (first) heater gr
28 From generator (maybe DF) li/bl
64 Charcoal filter solenoid bl/ge
65 Fuel pump relay- control ro/br
71
88 Injector 3 sw/li
89 Injector 4 li/sw
96 Injector 1 br/bl
97 injector 2 sw/gn
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