DTC P0811: Problem in Start Clutch Control System: General Description

The start clutch control system controls the clutch piston hydraulic pressure that affects the amount of power transmitted by the multiplate wet start clutch on the driven pulley shaft. According to the vehicle operating conditions, the engine control module (ECM) activates the CVT start clutch pressure control valve to control the hydraulic pressure that is applied to the start clutch piston. The start clutch control system detects clutch slip. If the difference between the vehicle speed measured by the CVT output shaft (driven pulley) speed sensor and the one measured by the CVT speed sensor is excessive when driving under certain conditions, a malfunction is detected and a DTC is stored.