A collection of historical timetables from the early days of railways in India to the recent past.
These timetables have been generously provided by various IRFCA members. See acknowledgements.
All timetables will open as PDF in a new browser tab. Many files are large (~50MB), please allow time to load.
Common in BMW E30s; uses 60-2 crank triggers. Pins 18/27 usually handle power, while pins 16/17 control injector banks. 88 Pins
Pinouts vary significantly between versions. Always verify your specific ECU part number.
If you are currently troubleshooting a specific vehicle issue, let me know or the 10-digit Bosch part number on the ECU casing. I can help you locate specific wire colors or troubleshoot exact pin assignments. Share public link bosch motronic ecu pinout
Dedicated pins for each cylinder injector (or banked injectors in older systems).
While you must always source the exact wiring diagram for your specific vehicle make, model, and year, this reference table highlights the classic Bosch DIN standard naming conventions you will encounter across documentation: Bosch DIN Code Function Description Typical Wiring Action Constant Battery Positive (+12V) Direct to Battery (fused) 15 Switched Ignition Positive (+12V) From Ignition Switch 31 Engine / Chassis Ground Direct to Engine Block or Chassis 50 Starter Crank Signal High signal during cranking 87 Relay Output Power Power fed from Engine Main Relay Common in BMW E30s; uses 60-2 crank triggers
When diagnostic scanners report "No Communication with ECU" or engines crank but refuse to start, look for these common Motronic wiring issues:
Found on older OBD-I and early OBD-II modules for serial diagnostics. Always verify your specific ECU part number
Used in 1980s classics (e.g., BMW E30, Porsche 944). They typically feature a 35-pin or 55-pin connector and rely on an Air Flow Meter (AFM) with a physical flap.
Sequential fuel injection, integrated coil-on-plug ignition drivers, and early diagnostic data buses. ### ME & MED Series (Motronic ME 7.5, ME 9, MED 17)
Energizes the ECU when the key is turned to the "ON" position. Labeled as Terminal 15 .
Hook up the K-Line or CAN lines to your OBD2 pass-through tool.
More historical timetables can be found on the IRFCA Photo Gallery.