Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
ENTRY AND START SYSTEM - SYSTEM DESCRIPTION
- CAUTION:
- If using a pacemaker, be sure to read the manual of the pacemaker before using the electrical key, as the radio waves of the electrical key may affect the pacemaker.
| ENTRY AND START SYSTEM DESCRIPTION |
In addition to conventional mechanical key and wireless door lock control functions, the entry and start system enables door locking / unlocking, steering lock releasing, engine starting and luggage compartment door opening without operating the electrical key. The only requirement is that the electrical key is in the user's possession.
| DETECTION AREA |
Precautions for the entire system:
| FUNCTION OF MAIN COMPONENTS |
| Components | Function |
| Electrical key | Consists of mechanical key, transmitter for wireless door lock control and transceiver for entry and start system |
| Certification ECU | Controls entry and start system in accordance with signals from each oscillator, various switches, ECUs and electrical key Judges and certifies ID code from entry door control receiver Transmits engine immobiliser unset signal to ID code box Transmits steering unlock signals to steering lock ECU |
| Power Source Control ECU | Controls push button start function in accordance with signals from various switches, ECUs and combination meter Transmits electrical key verification request signal to certification ECU in accordance with engine switch signal, and turns relays ON and OFF |
| ID Code ECU | Receives steering unlock or engine immobiliser unset signals from certification ECU, certifies them, and transmits unset signals to steering lock ECU or ECM |
| Cowl Side Junction Block RH (Main Body ECU) | Receives request signal from certification ECU and actuates door lock motor to unlock or lock door Transmits each door condition to certification ECU |
| Outside Door Handle (driver, passenger, rear doors) (antenna) | Transmits request signals |
| Outside Door Handle (driver, passenger, rear doors) (touch sensor) | Detects when person touches inside of outside handle |
| Outside Door Handle (driver, passenger, rear doors) (lock switch) | Transmits door lock request signals to certification ECU |
| Door Electrical Key Oscillator (driver, passenger, rear doors) | Receives request signal from certification ECU, and forms detection area around each door |
| Indoor Electrical Key Oscillator (console and rear seat) | Receives request signal from certification ECU, and forms detection area in vehicle interior |
| Luggage Compartment Electrical Key Oscillator (inner) | Receives request signal from certification ECU, and forms detection area in luggage compartment |
| Luggage Compartment Electrical Key Oscillator (outer) | Receives request signal from certification ECU, and forms detection area around luggage compartment door |
| Entry Door Control Receiver | Receives ID code from electrical key in detection area and transmits it to certification ECU Receives ID code from electrical key in luggage room and transmits it to certification ECU |
| Electrical Key Antenna | Receives ID code from electrical key and transmits it to entry door control receiver |
| Outside Rear View Mirror Foot Light | When electrical key enters exterior detection area, foot light is illuminated in accordance with request signal of certification ECU |
| Luggage Compartment Opener Switch | Transmits luggage compartment door open request signal to certification ECU |
| Stop Light Switch | Outputs state of brake pedal to power source control ECU |
| Wireless Door Lock Buzzer Combination Meter Multi-information Display Buzzer | When certification ECU detects human errors such as those below, it warns driver by sounding wireless door lock buzzer, displayed displays information and sounds a buzzer in accordance with request signal from ECU Example: Electrical key is taken out of vehicle Driver leaves vehicle while engine is still running Driver leaves vehicle while shift lever is in any position other than P (A/T) |
| CONSTRUCTION AND OPERATION |
Electrical Key
The electrical key consists of a mechanical key, a transmitter function for the wireless door lock control and a transceiver for the entry and start system.
A total of 7 electrical keys can be registered.
Oscillator (each door oscillator, front and rear indoor oscillator, luggage compartment inner oscillator, luggage compartment outer oscillator)
Each oscillator transmits the request signal received from the certification ECU, and forms an electrical key detection area to detect the presence of an electrical key. The detection area formed by each door oscillator and luggage compartment outer oscillator is approximately 0.7 to 1.0 m (2.3 to 3.3 ft.) from the outside handle of each door or the center of the rear bumper.
| ENTRY FUNCTION OPERATION |
The entry and start system has the following functions:
| Function | Outline |
| Mechanical Key | Operation is the same as conventional mechanical key. |
| Wireless Door Lock Control | This function remotely locks and unlocks all doors or luggage compartment. Operation is same as wireless door lock control system. However, the receiver in certification ECU uses entry door control receiver to control locking and unlocking. |
| Entry Illumination | When person carrying electrical key enters detection area, door will enter unlock standby mode and front map light and door mirror foot light will illuminate. |
| Entry Unlock | When electrical key is located in detection area of door oscillator, door will unlock by touching inside of outside door handle. |
| Entry Unlock Mode Switching | Changes doors that can be unlocked with entry unlock function between 2 modes. Driver door mode All door mode |
| Entry Lock | When electrical key is located in detection area of door oscillator and engine switch is off, door can be locked by pressing lock switch on outside door handle. |
| Entry Luggage Compartment Open | When electrical key is in detection area of luggage compartment outer oscillator, luggage compartment opens by pressing luggage compartment open switch. |
| Memory Call | This function operates driving position memory system in accordance with electrical key ID code. |
| Electrical Key Lock-in Prevention | Prevents confinement of electrical key if door is locked using outside door handle while electrical key is still inside vehicle. If all doors locked are and luggage compartment door is closed while electrical key is still in luggage compartment, warning buzzer sounds. If luggage compartment open switch is operated, luggage compartment door can be opened. |
| Warning | When any of situations below occur, entry and start system causes certification ECU to sound buzzer in combination meter and wireless door lock buzzer, and illuminate information in order to alert driver. Exit warning if shift lever position is not P and power source mode is not off (A/T). Exit warning if shift lever position is P and power source mode is not off (A/T). Warning if occupant leaves with electrical key. Warning if engine switch is operated while electrical key is outside actuation area. Warning if entry lock is operated while electrical key is inside vehicle. Warning if electrical key battery is weak. |
| Battery Saving | If electrical key is constantly located within actuation area of door oscillator, system maintains periodic communication with electrical key. Therefore, if vehicle remains parked in that state for a long time, electrical key battery and vehicle battery could be drained. |
| Key Cancel | Following electrical key functions can be cancelled by performing certain operations: Entry Unlock / Lock Memory Call Entry Luggage Compartment Open Electrical key Lock-in Prevention Warning |
| Electrical Key Code Registration | The total number of electrical keys that can be registered is four. Enables the registration (writing and storing) of transmitter recognition codes in the EEPROM that is contained in the Certification ECU. |
| WIRELESS DOOR LOCK AND UNLOCK AND LUGGAGE COMPARTMENT OPEN FUNCTION |
Push the LOCK / UNLOCK / LUGGAGE COMPARTMENT switch on the electrical key to operate each function. For details, .
| ENTRY UNLOCK FUNCTION |
The detection area is formed by communication between a door oscillator and door control receiver when the door is locked in order to detect access of the person carrying the electrical key.
When the person carrying the electrical key enters the detection area around the vehicle, the matching of the ID codes for a door oscillator and electrical key will automatically be performed. After the matching is completed, the door will enter unlock standby mode.
In unlock standby mode, the antenna built into the outside handle starts sensing. If the outside handle is held (the back side of the handle is touched), the door unlock operation will be performed. At this time, the hazard warning light blinks twice and the wireless door lock buzzer sounds twice.
If any of the doors are not opened after a door unlock operation, all doors will automatically lock after 30 seconds.
| ENTRY LOCK FUNCTION |
After leaving the vehicle carrying the electrical key, push the lock switch on the outside handle when all the doors are closed.
The certification ECU determines whether the electrical key is located inside or outside of the cabin based on the information from a door oscillator and room oscillator. Then matching of the ID codes is performed.
When the matching result shows that the ID codes of the electrical key and indoor antenna do not match and the ID codes of the electrical key and door oscillator match, the door lock function will operate. At this time, the hazard warning lights blink once and the wireless door lock buzzer sounds once.
If the electrical key is located inside of the cabin, the door lock function will not operate and the alarm buzzer (beep sound) will sound for 2 seconds.
| ENTRY LUGGAGE COMPARTMENT OPEN FUNCTION |
Stand in front of the luggage compartment with the electrical key and push the power luggage compartment opener switch to start the matching of the ID codes for the electrical key oscillator (outside luggage compartment). If the ID codes match, luggage compartment door open operation will be performed.
| PREVENTION OF ELECTRICAL KEY CONFINEMENT FUNCTION |
If you attempt to lock the door through keyless operation (move the lock knob to the lock position and then close the door) with the electrical key in the cabin, the system determines that the electrical key is located in the cabin and unlocks the door.
If the luggage compartment is closed with the electrical key in it, the alarm will sound and the luggage compartment can be opened only when all the doors are locked in order to prevent electrical key confinement in the vehicle.
| ENTRY ILLUMINATION FUNCTION |
When a person carrying the electrical key enters the detection area, the door will enter unlock standby mode and the front map light and door mirror foot light will illuminate.
- HINT:
- The entry illumination function operates when the electrical key enters the vehicle exterior detection area from out of the detection area. If the electrical key remains in the detection area for 3 seconds or more, the illumination function does not operate.
| MEMORY CALL FUNCTION |
When the engine switch is off and the driver door courtesy light is off, opening the door will operate the memory call function (the door will move to a previously recorded driving position). Using the electrical key, memory call, electrical key registration and electrical key cancellation can be performed.
| WARNING FUNCTION |
General
When any of the situations below occur, the entry and start system causes the certification ECU to sound the buzzer in the combination meter and the wireless door lock buzzer, and illuminate the combination meter's multi-information display in order to alert the driver.
| Warning Function Operation Condition | Situation |
| Exit warning if shift lever position is not P and power source mode is not off (A/T). | A |
| Exit warning if shift lever position is P and power source mode is not off (A/T). | B |
| Warning if occupant leaves with electrical key. | C |
| Warning if engine switch is operated while electrical key is outside the detection area. | D |
| Warning if entry lock is operated while electrical key is inside vehicle. | E |
| Warning if electrical key battery is weak. | F |
Situation A
There are 2 patterns for situation A.
Pattern 1: In situation A, the door is opened and the user tries to leave the vehicle.
Pattern 2: Then the user holds the electrical key and tries to move away from the vehicle.
In these situations, the following control is performed:
| Possible Effects without Warning | Sudden vehicle start, vehicle theft, vehicle roll-away |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Shift lever position is not P (A/T) Engine switch is not off Driver side door is opened and closed Vehicle speed is 0 km/h (0 mph) |
| Combination Meter Buzzer | Warning: Continuous sound Warning is stopped when one of following conditions are met Engine switch is off Shift lever position is P (A/T) Vehicle speed is above 0 km/h (0 mph) |
| Combination Meter Multi-information Display | - |
| Wireless Door Lock Buzzer | - |
| Possible Effects without Warning | Sudden vehicle start, vehicle theft, vehicle roll-away |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Shift lever position is not P (A/T) Engine switch is not off Driver side door changed from open to close Vehicle speed is 0 km/h (0 mph) Electrical key is not in vehicle |
| Combination Meter Buzzer | Warning: Continuous sound Warning is stopped when one of following conditions are met: Engine switch is off Shift lever position is P (A/T) Vehicle speed is above 0 km/h (0 mph) |
| Combination Meter Multi-information Display | Warning: Information below is displayed alternately on combination meter: "Shift to P Range" (A/T) "Key is not Detected" Engine switch is off Electrical key is in vehicle |
| Wireless Door Lock Buzzer | Warning: Continuous sound Warning is stopped when one of following conditions are met: Engine switch is off Shift lever position is P (A/T) Electrical key is in vehicle Vehicle speed is above 0 km/h (0 mph) |
Situation B
There are 3 patterns for situation B.
Pattern 1: In situation B, the door is opened and the user tries to leave the vehicle.
Pattern 2: Then the user holds the electrical key and tries to move away from the vehicle.
Pattern 3: Then the user tries to use the entry lock and presses the lock switch.
In these situations, the following control is performed:
| Possible Effects without Warning | Vehicle theft |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Shift lever position is P (A/T) Engine switch is not off Driver side door is opened |
| Combination Meter Buzzer | Warning: Continuously sound Warning is stopped when one of following conditions are met: Engine switch is off Shift lever position is not P (A/T) Driver door is closed |
| Combination Meter Multi-information Display | - |
| Wireless Door Lock Buzzer | - |
| Possible Effects without Warning | Vehicle theft, engine cannot be restarted |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Shift lever position is P (A/T) Engine switch is not off Driver side door changed from open to closed Electrical key is not in vehicle |
| Combination Meter Buzzer | Warning: Sounds once |
| Combination Meter Multi-information Display | Warning: Information below is displayed on combination meter: "Key is not Detected" Engine switch is off Electrical key is in the vehicle |
| Wireless Door Lock Buzzer | Warning: Sounds 3 times Warning is stopped when one of following conditions is met Engine switch is off Vehicle speed is above 0 km/h (0 mph) |
| Possible Effects without Warning | Vehicle theft |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Shift lever position is not P (A/T) Engine switch is not off All door are closed Lock switch is "ON" Electrical key is not in vehicle |
| Combination Meter Buzzer | - |
| Combination Meter Multi-information Display | - |
| Wireless Door Lock Buzzer | Warning: Sounds for 2 seconds |
Situation C
In this situation, the following control is performed:
| Possible Effects without Warning | Engine cannot be restarted |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Engine switch is not off Except driver door changed from open to closed Vehicle speed is 0 km/h (0 mph) Electrical key is not in vehicle |
| Combination Meter Buzzer | Warning: Sounds once |
| Combination Meter Multi-information Display | Warning: Information below is displayed on combination meter: "Key is not Detected" Engine switch is off Vehicle speed is above 0 km/h (0 mph) |
| Wireless Door Lock Buzzer | Warning: Sounds 3 times Warning is stopped when one of following conditions is met: Engine switch is off Vehicle speed is above 0 km/h (0 mph) |
Situation D
In this situation, the following control is performed:
| Possible Effects without Warning | Confuses the user |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Engine switch is not off Electrical key is not in vehicle |
| Combination Meter Buzzer | Warning: Sounds once |
| Combination Meter Multi-information Display | Warning: Information below is displayed on combination meter for 8 seconds (disappears after 8 seconds): "Key is not Detected" |
| Wireless Door Lock Buzzer | - |
Situation E
In this situation, the following control is performed:
| Possible Effects without Warning | Vehicle theft |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Engine switch is not off All door are closed Lock switch is "ON" Electrical key is in vehicle |
| Combination Meter Buzzer | - |
| Combination Meter Multi-information Display | - |
| Wireless Door Lock Buzzer | Warning: Sounds for 2 seconds |
Situation F
In this situation, the following control is performed:
| Possible Effects without Warning | Entry and start system does not function |
| Warning Condition | Certification ECU gives warning when all following conditions are satisfied: Engine switch is turned off after being left on (IG) for over 20 minutes Electrical key battery voltage is low |
| Combination Meter Buzzer | Warning: Sounds once |
| Combination Meter Multi-information Display | Information below is displayed on combination meter: "Low Key Battery" |
| Wireless Door Lock Buzzer | - |
| BATTERY SAVING |
Vehicle Battery Saving Function
In the entry and start system, signals are emitted outside of the vehicle at a prescribed interval (0.25 seconds) when the doors are locked. Therefore, the vehicle battery could be drained if the vehicle remains parked for a long time. For this reason, the controls listed below are affected:
| Condition | Control |
| Both conditions below are met for 4 days: Electrical key is not in detection area Touch sensor or lock switch operation is not performed | Signal transmission interval is extended from 0.25 to 0.75 seconds |
| Both conditions below are met for 14 days: Electrical key is not in detection area Touch sensor or lock switch operation is not performed | Automatically deactivates the entry and start system |
Reinstatement Conditions
Electrical Key Battery and Vehicle Battery Saving Function
In the entry and start system, if the electrical key is constantly located within the vehicle exterior detection area of the doors, the system maintains periodic communication with the electrical key. Therefore, if the vehicle remains parked in that state for a long time, the electrical key battery and the vehicle battery could be drained. For this reason, if this state continues longer than 10 minutes, the entry and start system automatically becomes deactivated.
Reinstatement Conditions