Fail-Safe Function
Fail-safe FunctionA: SENSOR FAILURE
If a failure is detected on either or both of turbine speed sensor 1 and 2 installed on the transmission, the gear is fixed in 4th to ensure minimum drivability.
B: FRONT SUN GEAR OVER-SPEED FAILURE
If an over-speed failure is detected on the front sun gear in the transmission, the gear is shifted to neutral and the vehicle stops. Then the gear is fixed in 2nd from vehicle start.
C: SOLENOID ELECTRICAL FAILURE
If the solenoid status is fixed to constantly energized or de-energized status due to an electrical failure, the gear is shifted depending on the failed solenoid and its status, and then the gear range is fixed. The table below shows the relation of faulty parts and fixed gear range.
D: HYDRAULIC FUNCTIONAL FAILURE
When a hydraulic functional failure is detected, the gear is shifted depending on the relation of faulty part and gear position at failure detection in order to ensure minimum drivability. The table below shows the relation of faulty parts and fixed gear range.
D: HYDRAULIC FUNCTIONAL FAILURE
When a hydraulic functional failure is detected, the gear is shifted depending on the relation of faulty part and gear position at failure detection in order to ensure minimum drivability. The table below shows the relation of faulty parts and fixed gear range.
E: RANGE SW ERROR
When a range SW error is detected, the gear is shifted to any of 1st, 3rd and 5th depending on the gear range before failure. If ignition is turned to OFF while a range SW error is detected, hydraulic control is electrically set to neutral after engine start until a range is selected.
F: LINE PRESSURE SOLENOID ERROR
When the line pressure solenoid has an error, the solenoid is turned to OFF to maximize the line pressure. Otherwise, normal control is performed.
G: LOCK-UP SOLENOID ERROR
When the lock-up solenoid has an error, the lock-up solenoid is constantly set to OFF (lock-up released).
H: TRANSFER CLUTCH SOLENOID ERROR
When a solenoid ON/OFF error is detected, the transfer solenoid is constantly set to OFF (LSD released).
I: CAN COMMUNICATION ERROR
When CAN communication has an error, the data received by CAN is fixed to the specified value to perform shifting control and to ensure minimum drivability.