ZWV/ZA (Ignition Timing Tap/Ignition Fade Out)

ASC - ENGINE CONTROL MODULE INTERFACES BOSCH - 750iL/530





The Automatic Slip Control (ASC) control module uses the interfaces with the engine control module to request an ignition timing change or ignition/injection fade out during an ASC control regulation. Two circuits are used, called ZWV and ZA, to signal the engine control module of the requested regulation.

^ ZWV - is the signal to modify the ignition timing.
^ ZA - is the signal for injection/ignition fade out.

The ZWV and ZA circuits are switched HIGH/LOW voltage signals requesting the specific control function to be carried out.