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A/T CONTROL SYSTEM TM-81 < FUNCTION DIAGNOSIS > [5AT: RE5R05A] C E F G H I J K L M A B TM N O P • *1: Spare for vehicle speed sensor·A/T (revolution sensor) • *2: Spare for accelerator pedal position signal • *3: If these input and output signals are different, the TCM triggers the fail-safe function. • *4: Used as a condition for starting self-diagnostics; if self-diagnostics are not started, it is judged that there is some kind of error. • *5: Input by CAN communications. • *6: Output by CAN communications. CAN COMMUNICATION CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle mul- LINE PRESSURE CONTROL • When an input torque signal equivalent to the engine drive force is transmitted from the ECM to the TCM, the TCM controls the line pressure solenoid valve. • This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the pres- sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving Line Pressure Control is Based On The TCM Line Pressure Characteristic Pattern • The TCM has stored in memory a number of patterns for the optimum line pressure characteristic for the driving state. • In order to obtain the most appropriate line pressure characteristic to meet the current driving state, the TCM controls the line pressure solenoid current value and thus controls the line pressure. Normal Control Out- Direct clutch solenoid X X X X Input clutch solenoid X X X X High and low reverse clutch solenoid X X X X Front brake solenoid X X X X Low coast brake solenoid X X X X X Line pressure solenoid X X X X X X X TCC solenoid X X X Self-diagnostics table *6 X Starter relay X X Control item Line pressure control Vehicle speed control Shift control Lock-up control Engine brake control Fail-safe function *3 Self-diag- nostics function PCIA0007E |