Why pinouts matter (and why they vary)
Cranks but no start. Have fuel pressure but no spark. bosch motronic ecu pinout
When testing on a bench, always use a diode when checking earth gates to prevent blowing the ECU's ground circuits. K-Line vs. CAN: Why pinouts matter (and why they vary) Cranks but no start
Open the passenger footwell (often under plastic trim) or engine fusebox. The ECU has a label like: Bosch 0 261 203 412 or 0 261 204 167 (ME7.5) Coolant Temp (CTS)
Air Flow Meter (AFM), Coolant Temp (CTS), Crankshaft Position (CPS), Oxygen (O2) Sensor.