EINNRICHTUNG ZUM VERBESSERN DER ARBEITSWEISE BEI FEHLERHAFTEM BETRIEB FUER EINE STEUEREINRICHTUNG FUER EIN AUTOMATISCHES GETRIEBE

摘要

An abnormality treatment device for an automatic transmission control device according to the invention comprises in input portions of signals from an engine load sensor, a vehicle speed sensor and a pressure sensor, abnormal value detection circuits for detecting any abnormal value of at least one of the signals from the sensors to generate an abnormality detection signal, and a speed range selection judgement circuit and a hydraulic control judgement circuit for generating respective abnormality treatment signals when receiving the abnormal detection signal, thereby maintaining a predetermined speed range and a predetermined high line pressure.