Keyless Entry: Description and Operation
System DescriptionINPUTS
Power is supplied at all times
- to BCM terminal 70
- through 50 A fusible link (letter f, located in the fuse and fusible link box).
- to BCM terminal 57
- through 15 A fuse [No. 22, located in the fuse block (J/B)].
When the key is inserted in the key switch and key lock solenoid, power is supplied
- to BCM terminal 37
- through key switch and key lock solenoid terminals 3 and 4
- through 10 A fuse [No. 19, located in the fuse block (J/B)].
When the ignition switch is ACC or ON, power is supplied
- to BCM terminal 11
- through 10 A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is ON or START, power is supplied
- to BCM terminal 38
- through 10 A fuse (No. 59, located in the fuse and relay box).
When the front door switch LH is ON (door is OPEN), ground is supplied
- to BCM terminal 47
- through front door switch LH terminal 2
- through front door switch LH case ground.
When the front door switch RH is ON (door is OPEN), ground is supplied
- to BCM terminal 12
- through front door switch RH terminal 2
- through front door switch RH case ground.
When the rear door switch LH is ON (door is OPEN), ground is supplied
- to BCM terminal 48
- through rear door switch LH terminal 2
- through rear door switch LH case ground.
When the rear door switch RH is ON (door is OPEN), ground is supplied
- to BCM terminal 13
- through rear door switch RH terminal 2
- through rear door switch RH case ground.
When the back door latch (door ajar switch) is ON (door is OPEN), ground is supplied
- to BCM terminal 43
- through back door latch (door ajar switch) terminal 7,
- through back door latch (door ajar switch) terminal 8,
- through body grounds B7 and B19.
Keyfob signal is input into the BCM from the remote keyless entry receiver.
The remote keyless entry system controls operation of the
- power door lock
- back door opener
- interior lamp and step lamps
- panic alarm
- hazard and horn reminder
- keyless power window down (open)
- auto door lock operation
OPERATING PROCEDURE
- When the keyfob is operated, the signal from the keyfob is sent and the remote keyless entry receiver receives the signal and sends it to the BCM. The BCM only locks/unlocks the doors if the ID number matches. (Remote control entry functions)
- Using the keyfob, the transmitter sends radio waves to the remote keyless entry receiver, which then sends the received waves to the BCM. Only if the ID number matches does the BCM lock/unlock the doors. (Remote control door function)
- Unless the key is inserted into the ignition key cylinder or one of the doors is opened within 1 minute after the UNLOCK switch on the keyfob is pressed, all the doors are automatically locked. (Auto lock function)
- When a door is locked or unlocked, the vehicle turn signal lamps flash and the horn sounds to verify operation. (Active check function)
- When the key is in the ignition key cylinder (when the key switch is ON) and one of the doors is open, the door lock function does not work even when the door lock is operated with the keyfob.
- Keyfob ID set up is available.
- If a keyfob is lost, a new keyfob can be set up. A maximum of 5 IDs can be set up simultaneously.
Remote Control Entry Functions
Operation Description
- When a button on the keyfob is operated, the signal is sent from the keyfob and received by the keyless remote entry receiver.
- The received signal is sent to the BCM and compared with the registered ID number.
- If the ID number matches, the BCM uses communication to send the lock/unlock signal to each door lock actuator.
- When the door lock actuators receive this communication, each operates to lock/unlock its door.
Remote control entry operation conditions
Auto Lock Function
Operation Description
- Unless the key is inserted into the ignition key cylinder, one of the doors is opened, or the keyfob is operated within 1 minute after a door lock is unlocked by keyfob operation, all the doors are automatically locked.
The 1 minute timer count is executed by the BCM and after 1 minute, the BCM sends the lock signal to all doors.
Lock operations are the same as for the remote control entry function.
Remote Control Automatic Back Door Function
Switching from all closed to all open
- When a button on the keyfob is operated, the signal is sent from the keyfob and received by the remote keyless entry receiver.
- The received signal is sent to the BCM and compared with the registered ID number.
- If the ID number matches, the BCM uses power window serial link communication to send the back door open signal to the back door control unit
- When the back door control unit receives the back door open signal for 0.5 seconds, if the remote control automatic back door operation enable conditions are met, the warning chime is sounded and the back door unlock signal is sent to the back door latch using communication.
- When the back door latch receives the back door unlock signal, it operates the release actuator and releases to back door latch.
- The back door control unit operates the back door motor to open the back door. (At this time, speed control, input reverse, and overload reverse control are executed.)
- When the back door is opened to the fully open position, the full-open position is detected with the rotation sensor, the back door motor is stopped.
- The door held by the back door stays at the full open position.
Full open -> full closed operation
- When a button of the keyfob is operated, the signal is sent from the keyfob and received by the remote keyless entry receiver.
- The received signal is sent to the BCM and compared with the registered ID number.
- If the ID number matches, the BCM uses power window serial link communication to send the back door close request signal to the back door control unit.
- When the back door control unit receives the back door close request signal for 0.5 seconds, if the remote control automatic back door operation enable conditions are met, the warning chime is sounded and the back door motor begins closing the back door.
- The back door control unit operates the magnetic clutch and the back door motor to close the back door. (At this time, the back door control unit executes speed control, input reverse, and overload reverse control.)
- When the back door comes to the half-latch state, the back door latch detects the half-latch state through half-latch switch operation. The back door latch latches the back door.
For the automatic back door system operation enable conditions, refer to "AUTOMATIC BACK DOOR SYSTEM". Description and Operation
Active Check Function
Operation Description
When a door is locked or unlocked by keyfob operation, the vehicle turn signals flash and the horn sounds to verify operation.
- When a button on the keyfob is operated, the signal is sent from the remote controller and received by the keyless remote entry receiver.
- The received signal is sent to the BCM and compared with the registered ID number.
- If the ID number matches, the BCM sends the turn signal flashing and horn signal to the IPDM E/R.
- The IPDM E/R flashes the turn signal lamps and sounds the horn for each keyfob operation.
Operating function of hazard and horn reminder
Hazard and Horn Reminder
BCM output to IPDM E/R for horn reminder signal as DATA LINE (CAN-H and CAN-L).
The hazard and horn reminder has C mode (horn chirp mode) and S mode (non-horn chirp mode).
Operating function of hazard and horn reminder
How to change hazard and horn reminder mode
With CONSULT-II
Hazard and horn reminder can be changed using "WORK SUPPORT" mode in "MULTI ANSWER BACK SET".
Without CONSULT-II
When LOCK and UNLOCK signals are sent from the keyfob for more than 2 seconds at the same time, the hazard and horn reminder mode is changed and hazard warning lamp flashes and horn sounds as follows:
Interior Lamp Operation
When the following input signals are both supplied:
- all door switches are in the OFF position. (when all the doors are closed);
- interior lamp switch is in DOOR position.
Remote keyless entry system turns on interior lamp and ignition keyhole illumination (for 30 seconds) with input of UNLOCK signal from keyfob.
For detailed description, refer to "ROOM LAMP TIMER OPERATION". Description and Operation
Panic Alarm Operation
When key switch is OFF (when ignition key is not inserted in key cylinder), remote keyless entry system turns on and off horn and headlamp intermittently with input of PANIC ALARM signal from keyfob.
The alarm automatically turns off after 25 seconds or when BCM receives any signal from keyfob.
Keyless Power Window Down (Open) Operation
When keyfob unlock switch is turned ON with ignition switch OFF, and the switch is detected to be on continuously for 3 seconds, the driver's door and passenger's door power windows are simultaneously opened.
Power window is operated to open and the operation continues as long as the keyfob unlock switch is pressed.
CAN Communication System Description
Refer to Information Bus.