| 摘要 |
PURPOSE:To detect trouble in a T/M output speed sensor and reduce the cost of production by setting up the sensor which detects a T/M input speed, and comparing signals of both input and output speed of a transmission. CONSTITUTION:Gear speed of a transmission and engagement or disengagement of a lockup clutch in a torque converter are determined from the T/M output speed signal detected by a T/M output speed sensor 2 and throttle opening to be detected by throttle sensor 3, and both first and second shift solenoids 15 and 16 built in the transmission and a lockup solenoid 17 are controlled for their on or off operation. In addition, a T/M input speed signal to be detected by a T/M input speed sensor 1 is compared with the T/M output speed signal whereby whether this T/M output speed signal gets out of order or not is judged. When something is wrong with it, speed is changed and controlled by the T/M output speed calculated from the gear ratio found out of a shift solenoid state at that time, on the basis of the T/M input speed. |
