Power Door Locks/Keyless Entry/Security System
Power Door Locks/Keyless Entry/Security SystemHow the Circuit Works
The power door locks, keyless entry, and security system are part of the multiplex integrated control system. The use of multiplexing incorporates all three systems together. The following multiplex control units operate the three Systems:
- Driver's MICU
- Front Passenger's Power Window Switch
- Gauge Control Module
- Immobilizer-keyless Control Unit
- Passenger's MICU
- Power Window Master Switch
Power Supply
Battery voltage is supplied at all times to the Driver's MICU, the Passenger's MICU, and the Power Window Master Switch through fuse 15 (in the under-hood fuse/relay box). Battery voltage is also supplied at all times to the Power Window Master Switch through fuse 24 (in the driver's under-dash fuse/relay box) and to the Front Passenger's Power Window Switch through fuse 13 (in the passenger's under-dash fuse/relay box). With the ignition switch in ON (II) or START (III), battery voltage is supplied to the Driver's MICU and the Passenger's MICU through fuse 5 (in the driver's under-dash fuse/relay box). With the ignition switch in ON (II), battery voltage is supplied to the Power Window Master Switch through fuse 16 (in the driver's under-dash fuse/relay box).
System Description
Door Locks (Switch Operation)
All lock and unlock commands from the Driver's and Front Passenger's Door Lock Switches are communicated across multiplex communication lines to the Driver's MICU and Passenger's MICU. The following lock or unlock signals are also communicated to the Driver's MICU and Passenger's MICU:
- Door Lock knob Switches
- Driver's Key Cylinder Switch
- Trunk Lid Opener
According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays which provide power and ground to the reversible electric door lock motors for lock and unlock modes.
Inserting the key into the Driver's Door Key Cylinder Switch and turning the key one time will command the Driver's MICU to unlock the driver's door. Turning the key a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.
Door Locks (Keyless Transmitter Operation)
The doors can be locked and unlocked with the Keyless Transmitter. All lock and unlock commands are received by the Immobilizer-Keyless Control Unit. The Immobilizer-keyless Control Unit communicates the lock and unlock commands to the Driver's MICU and Passenger's MICU via B-CAN.
According to the switch request, the Driver's MICU and Passenger's MICU control a series of relays which provide power and ground to the reversible electric door lock motors for lock and unlock modes.
Pressing the UNLOCK button one time will command the Driver's MICU to unlock the driver's door. Pressing the unlock button a second time will command the Driver's MICU and Passenger's MICU to unlock the remaining doors.
Pressing the LOCK button will command the Driver's MICU and Passenger's MICU to lock all of the doors.
Panic Mode
Pressing and holding the PANIC button on the Keyless Transmitter for 2 seconds will activate the panic mode feature. The panic mode command is received by the Immobilizer-Keyless Control Unit. The Immobilizer-Keyless Control Unit communicates the panic mode command to the Driver's MICU and Passenger's MICU via B-CAN.
According to the request, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 20 seconds. The panic mode can be cancelled by pressing any button on the Keyless Transmitter or by turning the ignition switch to the ON (II) position. If the ignition switch is in the ON (II) position, the panic mode cannot be activated.
Security System
The security system will arm automatically when the trunk and hood are closed, the key is removed from the ignition switch, and all of the doors are closed and locked.
The security system monitors the following signals:
- B-CAN Communication Lines
- Door Lock Knob Switches
- Door Switches
- Ignition Key Switch
- Security Hood Switch
- Trunk Lid Latch Switch
When the security system is activated, the Driver's MICU and Passenger's MICU sound the horns and flash the exterior lights for approximately 2 minutes. The security system can be deactivated by unlocking the driver's door with the Driver's Door Key Cylinder Switch or by pressing the UNLOCK button on the Keyless Transmitter.