KEYLESS ENTRY SYSTEM

The keyless entry system has been installed (Some models). There are the following features.

Transmitter has two buttons (LOCK/UNLOCK).
The ETACS-ECU is equipped with the integral receiver and receiving antenna.
Up to 4 encrypted codes (4 transmitters) can be registered using M.U.T.-III.
Answer-back function has been adopted.
Using the LOCK/UNLOCK buttons, all doors (including tailgate) can be locked or unlocked.

DESCRIPTION OF STRUCTURE AND OPERATION

TRANSMITTER

The transmitter is integrated into the master key.
When either button is pressed, the transmitter emits a radio signal representing a specific ID code.
There are two buttons on the transmitter; the lock button and the unlock button.
An indicator lamp, which illuminates when signals are transmitted, is added on the key grip. This indicator lamp informs you of the signal transmission status and warns you of flat battery.
A brilliant silver Three-diamond mark is stamped on the back side of the key grip to improve appearance.
A signal transmission circuit (printed circuit) and a battery are housed in one case. The case is housed in the key grip, thus improving resistance to water ingress.
A coin type battery, CR1616 is used in the transmitter.
The transmitter switch operation allows the system to operate as follows:

System operation	The transmitter is operated.
All doors (including tailgate) are locked.	Press the lock button once.
All doors (including tailgate) are unlocked.	Press the unlock button once.

ENCRYPTED CODE

The figure shows the codes transmitted from the transmitter. Every time the button is pressed, the data code is transmitted twice. The encrypted code for user identification is a combination of 0 and 1, and more than 1 million different combinations are available. In addition to the encrypted code, the data code contains a rolling code that changes at each transmission, protecting transmission codes from theft by coping.

ETACS-ECU (RECEIVER)

The ETACS-ECU incorporates a receiver with an antenna. The receiver compares the code sent through the antenna from the transmitter with the code retained in the receiver.
The ETACS-ECU sends a signal only when those two codes correspond and the rolling code is judged correct.
All of those output signals are processed internally in the ETACS-ECU.
A maximum of four encrypted code (4 transmitters) can be registered by connecting the M.U.T.-III to the diagnosis connector.

FUNCTION FOR CONFIRMING ETACS-ECU (RECEIVER) OUTPUT AND OPERATION

When the ETACS-ECU receives an electric wave signal of the identification code stored in the receiver, the ETACS-ECU outputs LOCK/UNLOCK signal and informs the driver of the keyless entry system operation by flashing the lamp (Answer-back). Using a customisation feature, the flashing patterns for the answer-back function can be changed according to the table below. The initial setting at factory for the answer-back function is as follows: "Hazard warning lamp: LOCK, Flash once, UNLOCK, Flash twice / Room lamp: LOCK, Flash once, UNLOCK, Stay on for 15 seconds." Using a customisation feature, the hazard answer-back function can be changed (Refer to

KEYLESS ENTRY HAZARD LAMP ANSWERBACK FUNCTION

When LOCK signal from the keyless entry transmitter is input to the ETACS-ECU, all doors (including tailgate) are locked and the hazard warning lamp flashes once. When UNLOCK signal is input, all doors (including tailgate) are unlocked and the hazard warning lamp flashes twice.

KEYLESS ENTRY ROOM LAMP ANSWER-BACK FUNCTION

When LOCK signal from the keyless entry transmitter is input to the ETACS-ECU, all doors (including tailgate) are locked and the room lamp will extinguish*. When UNLOCK signal is input, all doors (including tailgate) are unlocked and the room lamp illuminates for 15 seconds. The room lamp fades in, keeps on, and fades out in 15 seconds after the door unlock relay is operated.

note

*: If doors (including tailgate) are locked with the transmitter when the room lamp is ON while doors (including tailgate) are opened, the room lamp is switched off in 1.2 seconds. In addition, if doors (including tailgate) are locked with the transmitter when the room lamp is OFF, the room lamp does not work.

KEYLESS ENTRY TIMER LOCK TIME

If any door is not opened or closed within 30 seconds after the doors (including tailgate) are unlocked by the keyless entry system, ETACS-ECU automatically outputs the door lock signal to lock the doors (including tailgate). This function prevents the doors (including tailgate) from being unlocked unexpectedly by operation errors. Using a customisation feature, the keyless entry timer lock time can be changed (Refer to

OPERATION INHIBITION CONDITIONS

The operation of the keyless entry system is inhibited in the following conditions.

When the ignition key is inserted into the ignition switch.
When either door (including tailgate) is open (the door switch: ON). (including door ajar)