Compass 4WD L4-2.4L VIN W (2007)
If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in "D".
Fluid Temperature Sensor
If an unexpected signal is sent from the fluid temperature sensor to the TCM, the gear ratio obtained immediately before receiving the unexpected signal
is maintained and the gear ratio is controlled to keep engine speed under 5,000 rpm (approximately), depending on driving conditions.
Secondary Pressure Sensor
If an unexpected signal is sent from the secondary pressure sensor to the TCM, the secondary pressure feedback control is stopped and the offset value
obtained immediately before the non-standard condition occurs is used to control line pressure.
Line Pressure Solenoid
If an unexpected condition of the solenoid is detected by the TCM, the line pressure solenoid is turned OFF to achieve the maximum fluid pressure.
Secondary Pressure Solenoid
If an unexpected condition of the secondary solenoid is detected by the TCM, the secondary pressure solenoid is turned OFF to achieve the maximum
fluid pressure.
Lock-up solenoid
If an unexpected condition of the lock-up solenoid is detected by the TCM, the lock-up solenoid is turned OFF to cancel the lock-up.
Stepping Motor
If an unexpected condition of the stepping motor is detected by the TCM, the stepping motor coil phases "A" through "D" are all turned OFF to hold the
gear ratio used immediately before the unexpected condition occurred.
Lock-up/Selection Switching Solenoid
If an unexpected condition of the solenoid is detected by the TCM, the lock-up/selection switching solenoid is turned OFF to cancel the lock-up.
Backup Power Supply
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply for controlling from the battery is not supplied to
the TCM. Normal status is restored when turning the ignition switch OFF to ON after power is normally supplied
TCM
1. Shift control
2. Line pressure control
3. Selection control
4. Lock-up control
5. Engine/CVT integration control [CAN communication control]
6. Self-diagnosis function
7. Fail-safe function
Primary Speed Sensor, Secondary Speed Sensor
Primary Speed Sensor It is installed near the CVT fluid cooler in the transaxle case. It sends rotating speed of the primary pulley (input shaft) to the
TCM as a pulse signal.
Secondary Speed Sensor It is installed near the output gear part in the transaxle case. It sends rotating speed of the secondary pulley (output shaft) to the
TCM as a pulse signal. TCM converts the pulse signal to vehicle speed.
