The best approach: create a spreadsheet with three columns – OEM Motronic pin, wire color, and new ECU pin. I’ve done this for M1.3 and M1.7 at least a dozen times, and every single time I thank the engineer who originally documented the pinout.
| Pin | Function / Wire Colour | Connection | | :--- | :--- | :--- | | 4 | Diagnostics switch (blue/yellow) | Connect to a momentary switch to ground | | 5 or 16 | Ground (black) | Connect to system ground | | 17 | Check Engine Lamp (blue/red) | Connect a small lamp or LED (with resistor) to 12V | bosch motronic ecu pinout
All other pins (EGR, evap, secondary air) can be deleted. The best approach: create a spreadsheet with three
This was among the first to feature flash memory for diagnostic capabilities and control over multiple subsystems. This was among the first to feature flash
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