MODE HALL-REFERENCE SIGNAL ____________________________ (range not available) Indicates the position of the reference signal (missing teeth) in the Hall-effect sensor window. O2 ACTIVE ____________________________________________________ (range YES/NO) Indicates whether the lambda regulation part of the ECM is active or not (open/closed loop, this depends on the lambda sensor temperature and operating conditions of the engine. Under full load conditions, the ECM goes into open loop.
127 Data Parameters Gas Engine Parameters O2 ADP & ACTUAL VALUE) ________________________________ (range not available) Indicates the operation and Short-term correction of the actual fuel delivery. It shows whether the ECM is commanding a rich or lean mixture. A number above 0% indicates that the ECM has commanded a temporary rich mixture correction. A number below 0% indicates that the ECM has commanded a temporary lean mixture correction. These Short-term correction numbers are also used by the ECM to learn a fuel correction pattern or trend and are stored in the learned mixture or lambda values. Fuel correction operates only in closed loop. In open loop, a fixed value displays.