Keyless Access System Description - Control/Function (2/4-door)
Smart Entry Function
The body control module detects the input signal of the door outer handle touch sensor, the outer handle lock switch, or the trunk lid outer handle switch, and authenticates 2-way communication with the remote. Then the body control module activates the door lock/unlock actuator or trunk lid release actuator and an answer back. For details on the illumination patterns of the warning lights and the functional check of the system, refer to keyless access system symptom troubleshooting information .
Keyless Entry Function
The body control module receives keyless transmitter LOCK/UNLOCK signals from the remote. The body control module authenticates the RF signal from the remote, then the body control module activates the door lock actuators and the turn signal lights.
Remote Search Function
Determines if the remote is present inside the vehicle during some operation or function. Detects the door open and close with the vehicle in the ACCESSORY/ON mode situation. When the remote is taken out of the vehicle, the keyless buzzer will sound and the gauge control module (Only when the vehicle in the ON mode) will show a warning.
Lighting and Indicator Function
The body control module controls the engine start/stop switch light, displays information in the information display *2 or the multi-information display (MID) *1, and illuminates the keyless access indicators in the gauge control module.
*1: With multi-information display
*2: Without multi-information display
Backup Communication Function
When key authentication between the remote and the body control module is not possible because of a system abnormality or a drop of the battery voltage of the remote, the immobilizer function can be canceled by pressing the engine start/stop switch button once and bringing the remote close to the engine start/stop switch while the engine start/stop switch indicator is flashing. This causes the immobilizer signal to be send to the body control module via LF antenna of the engine start/stop switch.
Remote Engine Start System (With Remote Engine Start)
Start the Engine
The remote engine start feature is initiated by first pressing the lock button, then pressing and holding the "START" button within 5 seconds on the remote transmitter. An RF signal from the remote transmitter is received by the body control module, which then sends the request to start the engine to the PCM. At the same time, the body control module authenticates the key for the immobilizer system. The PCM starts the engine and sends feedback to the body control module indicating the status of the engine.
Electric Steering Lock (With Electric Steering Lock)
The electric steering lock control unit is built into the electric steering lock, and it controls the steering lock motor. When the remote code is identified, the electric steering lock control unit unlocks the steering lock by controlling the steering lock motor.
Key Lockout Prevent Function
The body control module monitors whether or not there is the remote in the vehicle. If the remote is in the vehicle, the system will not lock the doors. If the driver manually locks and closes the doors with the remote in the vehicle, the body control module energizes the driver's door lock actuator and unlocks the driver's door. When the trunk is closed with the remote left in the trunk, the body control module detects the location of the remote unit and does not lock the trunk.
Immobilizer Function
The immobilizer function provides mutual authentication between the body control module, the PCM, and the VSA modulator-control unit when the vehicle is turned to the ON mode. The engine stays running after the engine start-up if the immobilizer signal matches. The body control module authenticates the VSA modulator-control unit and the immobilizer signal only one time, when the vehicle is turned to the ON mode after resetting of the 12 volt battery, removal and installation of the back-up fuse, or removal and installation of the VSA modulator-control unit.
For some models*, the brake pedal must be depressed to perform the immobilizer authentication.
*: Canada models
Alarm Function
Detects the door open or close with the vehicle in the ACCESSORY/ON mode. When the remote is taken out of the vehicle, the keyless buzzer will sound and the gauge control module (Only when the vehicle is in the ON mode) will show a warning. Before the remote battery level falls to the point where the remote cannot be detected, the gauge control module will show a warning and an alarm will sound. Command to display shift to P warning should be transmitted via B-CAN.
Registration Facility
The body control module can store up to 6 remotes with the HDS.
Fault Diagnosis Function
The system has a fault diagnosis function. If any malfunction occurs, the keyless access indicator comes on in the gauge control module.
Customer Emergency
When the engine start/stop button is pressed continuously at least two times*, three times*, or once for 1.5 seconds or longer in an emergency while driving, the engine turns off, and the vehicle mode switches to ACCESSORY. In this mode, the steering wheel remains unlocked (with steering lock).
*: Control is different depending on the specifications.
Panic Function
When you press the PANIC button on the remote, the body control module sounds the horn and activates the exterior lights.
Walk Away Auto Lock Function
The walk away auto lock system detects where the remote is and locks all doors on the vehicle when all the doors are closed and the remote is outside of the vehicle and out of the range.
To operate the walk away auto lock system, it is necessary to enter the auto lock mode.
To enter the auto lock mode, all the following conditions must be met:
- The vehicle is in the OFF (LOCK) mode.
- Any door is closed, and then all the doors become closed.
- The remote is not inside of the vehicle.
- The remote is outside and within 2 m (7 ft) from the vehicle.
The vehicle's buzzer beeps once to confirm that the auto lock mode is engaged.
After the auto lock mode is engaged and the remote is away more than 2 m (7 ft) from the vehicle for 2 seconds or more, all the doors become locked. At that time, the vehicle's buzzer beeps once and some exterior lights blink once to confirm that the walk away lock system is engaged.
After the auto lock mode is engaged, if the remote is within 2 m (7 ft) from the vehicle for 30 seconds or more, the doors automatically lock.
The walk away auto lock system does not work under the following conditions:
- The remote is inside of the vehicle.
- Any door is closed when the remote is more than 2 m (7 ft) away from the vehicle.
- Any door is opened after the auto lock mode is engaged.
The walk away auto lock system does not work and the vehicle's buzzer beeps under the following conditions:
- The remote is away more than 2 m (7 ft) from the vehicle while closing the door.
- A communication error occurs between the remote and the vehicle.
The walk away auto lock system can be cancelled temporarily by customization.
Keyless Access System Operation Manual Customize
The keyless access system can be enabled and disabled by the operation shown in the table. The system is enabled and disabled each time the unlock button is pressed on the remote in the customize mode.