Fail Safe Function

A fail safe function is provided to maintain driveability if a failure should occur in any of the following components:

1. Inhibitor Switch
   
   If 2 signals are input due to inhibitor switch failure, vehicle can still be driven with limited shifting capability
2. Line Pressure Duty Solenoid
   
   If line pressure duty solenoid fails, solenoid is turned off and line pressure is raised to maximum to enable vehicle operation.
3. Lock-Up Duty Solenoid
   
   If lock-up duty solenoid fails, solenoid is turned off and torque converter lock-up is released.
4. Low Clutch Timing Solenoid
   
   If low clutch timing solenoid becomes faulty, low clutch timing solenoid is disabled and vehicle is made driveable only in 1st and 3rd gears.
5. Shift Solenoids No. 1 & No. 2
   
   If a malfunction occurs in either solenoid, both solenoids are turned off. Vehicle can be driven only in 3rd gear. If both solenoids fail, mechanical hydraulic circuit is used.
6. Throttle Sensor
   
   If throttle sensor becomes faulty, throttle position input signal will be set to predetermined position.
7. Transfer Duty Solenoid
   
   If transfer duty solenoid fails, solenoid is turned off. This causes maximum oil pressure to be applied to transfer clutch so power is always transmitted to rear axle (direct coupling AWD).
8. Vehicle Speed Sensor No. 1 & No. 2
   
   A dual speed sensing system is used. Speed signal is taken from transaxle (output shaft revolution sensor) and also from a sensor built in speedometer. If one sensor system fails, vehicle can be controlled normally with other sensor system.
9. 2-4 Brake Timing Solenoid
   
   If 2-4 brake timing solenoid becomes faulty, 2-4 brake timing solenoid is disabled and vehicle is made driveable only in 1st and 3rd gears.
10. 2-4 Brake Duty Solenoid
    
    If 2-4 brake duty solenoid becomes faulty, 2-4 brake duty solenoid is disabled and vehicle is made driveable only in 1st and 3rd gears.