Bosch Ecu Wiring Diagram -

Drop the hardware number in the comments for pinout suggestions.

Engine cranks, no spark, no injector pulse. bosch ecu wiring diagram

Verify continuity between ECU pin A2 and battery negative. Resistance should be <1 Ohm. Drop the hardware number in the comments for

Look for the output pin controlling the relay (often A3 ). With the key ON, this pin should show 0V (ground) for 2 seconds, then float open. During cranking, it should ground constantly. then float open. During cranking