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EC-68 < SYSTEM DESCRIPTION > [VQ35DE] AUTOMATIC SPEED CONTROL DEVICE (ASCD) AUTOMATIC SPEED CONTROL DEVICE (ASCD) System Diagram INFOID:0000000010094813 System Description INFOID:0000000010094814 INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM via the CAN communication line BASIC ASCD SYSTEM Refer to Owner's Manual for ASCD operating instructions. Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/ h (25 MPH) and 144 km/h (89 MPH). ECM controls throttle angle of electric throttle control actuator to regulate engine speed. Operation status of ASCD is indicated by CRUISE lamp in combination meter. If any malfunction occurs in the ASCD system, it automatically deactivates control. NOTE: Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws. SET OPERATION Press MAIN switch. (The CRUISE lamp in combination meter illuminates.) When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89 MPH), press SET/COAST switch. ACCELERATE OPERATION If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until the switch is released or vehicle speed reaches maximum speed controlled by the system. And then ASCD will maintain the new set speed. CANCEL OPERATION When any of following conditions exist, cruise operation will be canceled. • CANCEL switch is pressed • More than 2 switches on ASCD steering switch are pressed at the same time (Set speed will be cleared) • Brake pedal is depressed JMBIA1616GB Sensor Input signal to ECM ECM function Actuator ASCD brake switch Brake pedal operation ASCD vehicle speed Electric throttle control Stop lamp switch Brake pedal operation ASCD steering switch ASCD steering switch operation TCM Gear position Powertrain revolution* Unified meter and A/C amp. Vehicle speed* |