RX400h · Service Manual BODY ELECTRICAL

SYSTEM DESCRIPTION

Troubleshooting


WIRELESS DOOR LOCK CONTROL SYSTEM DESCRIPTION

  1. This system is a convenient system for locking and unlocking all the doors at a distance. The wireless control system has the following features:

    1. In this system, the door control receiver performs the code identification process and the multiplex network body ECU operates the door lock control. A serial data link is provided for communication between the door control receiver and the multiplex network body ECU.
    2. w/ Power back door:
      A key-integrated type transmitter is used. It contains the following 3 switches: the LOCK switch, UNLOCK switch and PWR DOOR (power back door) switch.
    3. w/o Power back door:
      A key-integrated type transmitter is used. It contains the following 2 switches: the LOCK switch and UNLOCK switch.
    4. A power window up/down function and a sliding roof (normal type only) open/close function are included in the wireless door lock control system.
    5. A LED (Light Emitting Diode) is mounted on the transmitter to indicate if the battery is discharged.

  2. The wireless door lock control system has the following functions:

    Function
    		 Outline
    All doors lock operation
    		 Pressing LOCK locks all doors
    All doors unlock operation
    		Pressing UNLOCK unlocks all doors
    Power back door open/close operation (w/ Power back door)
    		 Holding down PWR DOOR for longer than about 1 second opens or closes the back door
    Power window and sliding roof (normal type only) open/close operation
    1. Holding down LOCK for longer than about 3 seconds closes all power windows and power sliding roof
    2. Holding down UNLOCK for longer than about 3 seconds opens all power windows and power sliding roof
    Double locking system operation
    1. Pressing LOCK, then pressing it again within 5 seconds activates the double locking system
    2. Pressing UNLOCK releases the double locking system
    Answer-back operation
    1. Hazard warning lights flash once when doors are locked and flash twice when doors are unlocked to indicate that the operation has been completed
    2. When the transmitter is used for opening/closing the power back door or for opening a power window, the wireless door lock buzzer will sound (once for power window, twice for power back door) to indicate that the operation has been completed
    Automatic lock function
    		 If none of the doors is opened within 30 seconds after they are unlocked by the wireless door lock control, all doors will lock again automatically
    Repeat function
    		 If a door is not locked in response to the locking operation of the transmitter, the body ECU will output a lock signal after 1 second
    Illuminated entry function
    		 When all doors are locked, pressing door UNLOCK causes the interior lights to come on simultaneously with unlocking operation
    Security function
    		 Sends an operation signal as a rolling code
    Door ajar warning function
    		 If any door is open or ajar, pressing LOCK will cause the wireless door lock buzzer to sound for about 10 seconds
    Transmitter recognition code registration function
    		 Enables registering (writing and storing) of 4 types of recognition codes in the EEPROM that is built into the body ECU
    Self-diagnosis
    		 If there is a malfunction in the system, the body ECU sets a DTC in its memory

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