Constant Ground (12V potential) on Ignition Outputs at IG ON (0 RPM), EMU BLACK V2

EMU BLACK / CLASSIC
1
  1. Bike: KTM 690 (Single Cylinder)
  2. ECU: ECUMASTER EMU Black (V2 Software)
  3. Coils: Dual 2-pin Passive Coils (DENSO)
  4. Wiring: * Pin 1: Constant +12V (at IG ON), Pin 2: Connected to G8 and G16 (Configured as a set)

While the engine is at 0 RPM (IG ON), I am measuring a constant DC 12V potential difference across the two pins at the coil connector. Oscilloscope confirms it is a flat DC line. This indicates that the ECU is actively pulling the Ignition pins to Ground even though the engine is stationary.

Test Results:

  • Spark Test: When I plug in the coils and crank the engine (checking spark against the engine block), no spark is generated. It seems the ECU is holding the ground constantly rather than switching it.

  • Wiring Integrity: Verified. No continuity between the ignition wires and chassis ground when the ECU is disconnected.

  • Pin Swapping: I assigned the ignition event to other unused pins, and they show the exact same constant 12V potential.

  • Config Check: When I set the Ignition Event to “None”, the 12V potential difference disappears (drops to 0V). This proves the hardware drivers are not blown; the ECU is intentionally holding the ground based on some logic.

Key Questions:

  • Is it normal for EMU Black to hold G8/G16 at 0V (Ground) when the engine is not turning? (In my understanding, it should be Floating/Open to avoid coil burnout).

  • Could this be a “Logic Inversion” issue even if there is no explicit ‘Invert’ toggle in the V2 software?

  • Why would the spark fail to trigger during cranking despite the 12V potential being present? Is the dwell logic stuck?

2

Your map file would really help us help you diagnose the issue.

Do you have a conflict when you check the assigned outputs? Do you have coil type set to ‘without amplifier’? Are your trigger settings correct? How much current does the coil draw/Do you really need to run it from two outputs?