DESCRIPTION
The fail-safe function minimizes the loss of Continuously Variable Transaxle (CVT) system functions when a sensor or solenoid valve malfunctions.
FAIL-SAFE
Fail-safe control list:
| Malfunctioning Part | Function |
|---|---|
| Transmission revolution sensor (NT) | The oil pressure of the primary pulley and secondary pulley are set to a specified value. The opening angle of the throttle valve is limited to reduce input torque. |
| Transmission revolution sensor (NOUT) | |
| Transmission revolution sensor (NIN) | |
| Shift solenoid valve SL | The ECM stops sending current to the shift solenoid valve SL, and forward and reverse clutch control is performed mechanically. Lock-up clutch control is canceled. |
| Shift solenoid valve SC | The ECM stops sending current to the shift solenoid valve SC, and forward and reverse clutch control is performed mechanically. Lock-up clutch control is canceled. |
| Shift solenoid valve SLU | The ECM stops sending current to the shift solenoid valve SLU, and forward and reverse clutch control is performed mechanically. Lock-up clutch control is canceled. |
| Shift solenoid valve SLP | The gear ratio is limited to a specified range. |
| Shift solenoid valve SLS | ·
The gear ratio is set to a specified value. ·
The lock-up range is limited to a particular range. |
| CVT fluid temperature sensor | The ECM sets the fluid temperature to a predetermined value to perform normal control. |
| Airbag sensor with ECU assembly (yaw rate and acceleration sensor) | G AI-shift control is disabled when a malfunction is detected. |