Control device of continuously variable transmission

A control device of a continuously variable transmission in a vehicle, which control device comprises:

• a transmission mechanism comprising a primary pulley and a secondary pulley provided with a first cylinder chamber and a second cylinder chamber, with groove widths being changed by supply of hydraulic pressure respectively, and a belt provided between said primary pulley and said secondary pulley;
• a hydraulic pump being driven by an electric motor to supply hydraulic pressure;
• line pressure control means for regulating hydraulic pressure from said hydraulic pump to predetermined line pressure and continuously supplying said line pressure to said second cylinder chamber;
• a shift control valve being driven by an actuator to supply hydraulic pressure, whose original pressure is line pressure, to said first cylinder chamber;
• and shift control means for outputting a shift command for controlling said actuator according to a driving state, said control device of the continuously variable transmission comprising:
• failure information holding means for holding failure information concerning a failure of said electric motor;
• and
• wherein if, at start of driving, said failure information holding means holds failure information indicating that said electric motor failed in previous driving, said shift control means outputs a shift command targeting a high range ratio for a predetermined period of time before the start of driving to thereby fill said first cylinder chamber of said primary pulley with hydraulic pressure, and starts outputting a shift command targeting a normal gear ratio according to the driving state after a predetermined vehicle speed is reached after the start of driving.