Ignition Bypass

Ignition Bypass

Ignition Bypass

The Ignition Bypass function allows for support of older GM ignition systems which used this function. This type of ignition system has the trigger signal being sent directly to the ignitor module which then fires the coil. To allow the ECU to take control of ignition timing it will “bypass” the ignitor and send the signal to the ECU for ignition timing processing. The ECU then sends a signal back to the ignitor with the ignition timing adjusted and then the ignitor module fires the coil.  Without the Ignition Bypass function enabled, the timing will be controlled only by the ignitor module at a fixed value.



Ignition Bypass Output - Any DPO can be selected for this function. The Pull Up should be set to 5.00 V, and the Active State set to High for the Ignition Bypass to function correctly.

    • Related Articles

    • Ignition Bypass

      The Ignition Bypass function allows for support of older GM ignition systems which used this function. This type of ignition system has the trigger signal being sent directly to the ignitor module which then fires the coil. To allow the ECU to take ...

    • Ignition

      The Elite Series ECU's cannot control the ignition coils directly. Some sort of ignition amplifier such as a power transistor, Haltech ignition module or high intensity spark unit (CDI unit eg MSD 6A, crane HI6, M&W pro12 etc) must be used to ...

    • Ignition Correction

      This table sets an ignition correction that allows for ignition timing to be advanced or retarded when the RPM is above or below the Target RPM, and idle control is active. Typically the timing will be advanced when below the Target RPM to add engine ...

    • Base Ignition Angle

      Axis selection and changing values This table is intended to be used with Ignition Load based on MAP or TPS set as the first/x (left to right) axis, and RPM as the second/y (bottom to top) axis. Changing the axis values can be accomplished by ...

    • Disconnect Ignition

      To avoid damaging ignition components, ensure that you disconnect your ignition modules and or ignition fuse before power up for the first time, especially if the ECU is not yet configured for your particular engine and ignition system