DTC P0761: Shift Solenoid Valve C Stuck OFF: General Description

Shift solenoid valve C is installed in the transmission housing. It is controlled by the ON/OFF signal from the powertrain control module (PCM) to apply modulated pressure to shift valve C. The signal from the PCM is output to apply clutch pressure control pressure to the proper gear change clutch according to the gear change schedule. When the signal to shift solenoid valve C from the PCM is ON, and modulated pressure is discharged, shift valve C is inactive. When the signal to shift solenoid valve C from the PCM is OFF, and modulated pressure is applied to shift valve C, it operates against the shift valve C spring. The PCM monitors the input shaft (mainshaft) speed and the output shaft (countershaft) speed at the gear change determined by the shift schedule. When an improper gear ratio is output compared to the predetermined gear change mode, a shift solenoid valve C OFF failure is detected and a DTC is stored.