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FAIL-SAFE FUNCTION/BACKUP FUNCTION Mitsubishi Lancer X рестайлинг

Continuously Variable Transaxle (Cvt) Diagnosis & On-Vehicle Service - Lancer

FAIL-SAFE FUNCTION/BACKUP FUNCTION

If abnormality occurs in signals from various sensors, switches, or solenoids, this function allows controlling them with the minimum adverse effect to the driving performance. The following shows the fail-safe controls when an abnormal signal is input to TCM from each sensor.

Malfunctioning ItemControl Default During Malfunction
Secondary pulley speed sensorPerforms the shift control depending on the accelerator angle. Also, prohibits the sport mode and controls as the D range < Vehicles with sport mode >.
Primary pulley speed sensorPerforms the shift control depending on the accelerator angle and secondary pulley rotation (vehicle speed). Also, prohibits the sport mode and controls as the D range < Vehicles with sport mode >.
Transmission range switchControls as the D range.
Transmission fluid temperature sensorControls using the fixed value for the fail-safe function.
Secondary pressure sensorStops the secondary pressure feedback control and controls the line pressure using the fixed value for the fail-safe function. Also, suppresses the engine torque.
Line pressure solenoid valveSwitches the line pressure solenoid valve OFF to achieve the maximum line pressure.
Secondary pressure solenoid valveSwitches the secondary pressure solenoid valve OFF to achieve the maximum secondary pressure.
Lock-up solenoid valveSwitches the lock-up solenoid valve OFF to release lock-up.
Stepper motorSwitches all the coils A to D of the stepper motor OFF to retain the gear ratio just before the abnormality occurs.
Lock-up/select switching solenoid valveSwitches the lock-up/select switching solenoid valve OFF to release lock-up.
Back-up power supplyIf the control memory back-up power supply from the battery is not supplied to TCM, limits the engine torque to protect the transmission main body. After the normal power is supplied, turning the key switch from "LOCK" (OFF) to "ON" once resumes the normal status.
Paddle shift switch < Vehicles with sport mode >Prohibits the paddle shift operation.
Shift switch assembly < Vehicles with sport mode >Prohibits the sport mode operation.

FAIL-SAFE FUNCTION