Wireless Door Lock Control System (Diagnostics - Introduction): Overview Lexus CT I

SYSTEM DESCRIPTION

1. WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system can be used to lock and unlock all doors from a distance. The system is controlled by a electrical key transmitter which sends radio waves to the door control receiver. The certification ECU (smart key ECU assembly) performs an ID code identification process and engages the door lock control.
2. FUNCTION OF MAIN COMPONENTS Component Function Electrical key transmitter Has lock, unlock and panic switches. Transmits weak radio waves (recognition codes and function codes) to the door control receiver. Illuminates the indicator light (LED) during transmission. Door control receiver Receives weak radio waves from the electrical key transmitter and sends them to the certification ECU (smart key ECU assembly). Front door courtesy light switch assembly LH/RH Rear door courtesy light switch assembly LH/RH Back door courtesy light switch Turns on when a door is opened and turns off when it is closed. Outputs door status signals (open or closed) to the main body ECU (multiplex network body ECU). Front door lock assembly LH/RH Rear door lock assembly LH/RH Back door lock assembly Built-in motor locks or unlocks door. Transmits the door lock position of each door to the main body ECU (multiplex network body ECU). Certification ECU (Smart key ECU assembly) Sends wireless door lock control signals in response to the code data from the door control receiver and signals from each ECU.
3. SYSTEM FUNCTION The electrical key transmitter has the lock, unlock and panic switches. Operating these switches activate each function. The wireless door lock control system has the following functions: HINT: The default settings of the following functions are on. Part of these functions can be customized. Refer to «CUSTOMIZE PARAMETERS»(ref-568596-S00333725352013072300000) . Function Operation All door lock Pressing the lock switch locks all doors. All door unlock Pressing the unlock switch unlocks all doors. All door unlock (Unlock 2 operation) Pressing the unlock switch twice within 3 seconds unlocks all doors after the driver door is unlocked. Automatic lock If none of the doors is opened within 60*1/30*2 seconds after they are unlocked by the wireless door lock control, all doors will lock again automatically. Answer back (Hazard warning light) When the doors are locked by wireless operation, the hazard warning lights flash once. When the doors are unlocked by wireless operation, the hazard warning lights flash twice. Answer back (Wireless door lock buzzer) When the doors are locked by wireless operation, the wireless door lock buzzer sounds once. When the doors are unlocked by wireless operation, the wireless door lock buzzer sounds twice. Panic alarm Pressing the panic switch of the transmitter for longer than about 0.8 seconds causes the following alarms to activate: Sounds the horn. Flashes the headlights, taillights and hazard warning lights. Illuminates the interior lights (when the switch is in the door position). While the panic alarm is operating, pressing any switch of the transmitter cancels the alarm operation. Door ajar warning The buzzer sounds when the lock switch is pressed when any of the doors are ajar, and it sounds for 10 seconds continuously. The buzzer stops when all doors are closed or the unlock switch is pressed. Illuminated entry When all doors are locked, pressing the unlock switch causes the interior lights to come on simultaneously with the unlock operation. Memory call*3 This function operates the memory system in accordance with the key ID. *1: except Mexico and Korea *2: for Mexico and Korea *3: w/ Seat memory

OPERATION CHECK

1. NOTICE WHEN CHECKING FOLLOWING Wireless door lock/unlock function: This wireless door lock control function operates only when the following 3 conditions are met: The power switch is off. All doors are closed. The power door lock control system is operating normally. HINT: The unlock function operates even when a door is open. The size of the wireless door lock control operation area differs depending on the situation. The size of the operation area differs depending on the user and the way the transmitter is held. In certain areas, the remote control function will only operate partially for the operational area, which will be reduced due to the vehicle body shape and the influence of the surrounding environment. Since the transmitter uses weak radio waves, strong radio waves or electrical noise in the frequency used by the transmitter may reduce the size of the operational area and the remote control may not function. When the transmitter battery is weak, the size of the operation area is reduced and the remote control may not function. HINT: If the electrical key transmitter has been left in a place that is exposed to direct sunlight, such as on the instrument panel, it may cause the battery to be weakened or cause other related problems.
2. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS NOTE: The operation check below is based on the non-customized initial condition of the vehicle. HINT: The switches described in this text are the switches for transmitting signals. The switches are built into the electrical key transmitter. All the functions listed below must be checked in comparison with the remote control operation area. Make sure that the vehicle is in an area that allows the wireless control function to operate. Check basic functions. Check whether the LED of the transmitter comes on 3 times when each switch is pressed 3 times. HINT: If the LED does not come on when the switch has been pressed 3 times or more, it may have a weak battery. Check that all doors lock when the lock switch is pressed. Check that the driver door unlocks when the unlock switch is pressed once, and all doors unlock when pressed twice within 3 seconds. Check the chattering prevention function. Check that the corresponding operation occurs only once and is not repeated continuously while the switch is held. However, when the switch is operated repeatedly at 1-second intervals, check that the corresponding operation is carried out. Check the automatic locking function. Check that the doors relock automatically as long as none of the doors have been opened or all doors have not been locked within approximately 60*1/ 30*2 seconds after all doors are unlocked by pressing the unlock switch. Check that the automatic locking function does not operate when any door has been opened within approximately 60*1/ 30*2 seconds of unlocking the doors by pressing the unlock switch. Check that the automatic locking function does not operate when all doors have been locked manually (such as using key linked operation, or by pressing the lock switch) within approximately 60*1/ 30*2 seconds of unlocking the doors by pressing the unlock switch. *1: except Mexico and Korea *2: for Mexico and Korea Check the switch operation fail-safe function. Check that the doors cannot be locked or unlocked by operating a switch on the unregistered transmitter, and that the doors are locked and unlocked by operating a switch on the registered transmitter. Check the door ajar warning function. Check that the wireless door lock buzzer sounds for approximately 10 seconds when the lock switch is pressed with any of the doors ajar or open. Check the repeat function. Check that all doors attempt to automatically lock once again 1 second after the lock switch has been pressed while the driver door control knob is being held in the unlock position. Check the answer-back (hazard warning light) function. When the lock switch is pressed, check that the hazard warning lights flash once simultaneously with the locking operation of all doors. When the unlock switch is pressed once, check that the hazard warning lights flash twice simultaneously with the unlocking operation of the driver door. Check the answer-back (wireless door lock buzzer) function. When the lock switch is pressed, check that the buzzer sounds once simultaneously with the locking operation of all doors. When the unlock switch is pressed once, check that the buzzer sounds twice simultaneously with the unlocking operation of the driver door. Check the remote panic function. Refer to «SYSTEM DESCRIPTION»(ref-568599-S36287197012013072300000) . Check the illuminated entry function. Refer to «OPERATION CHECK»(ref-568600-S31597278022013072300000) . Check the power window down function. Refer to «OPERATION CHECK»(ref-568604-S31525172832013072300000) . Check the memory call function. Refer to «OPERATION CHECK»(ref-568832-S40964105972013072300000) .