Keyless Entry: Description and Operation

GENERAL INFORMATION

- Antenna and receiver are incorporated in the ETACS-ECU.
- ID code can be registered by using scan tool MB991958 (M.U.T.-III sub assembly).
- Transmitter is integrated into the master key, which incorporates lock button, unlock button, trunk button and panic button.
- When the transmitter unlock button is pressed once, the driver's door will be unlocked. If the button is pressed twice, all the doors will be unlocked. The adjustment function also allows you to open all the doors by pressing the unlock button only once. For further details on using the multi-center display (middle grade type) to adjust the unlock operation, refer to On-vehicle Service Adjustments .
- When the transmitter is operated, the answer back function will work as follows:





- The answer back operation can be altered as follows:
NOTE:
Enabling/disabling the hazard warning light flashing, the horn sounding in accordance with the answer back function. For further details on using the transmitter to adjust answer back, Enabling/Disabling the Answer Back Function see the section below. For further details on using the multi-center display (middle grade type) to adjust answer back, refer to On-vehicle Service Adjustments .





- If none of the doors is opened or the ignition key is not inserted in the ignition switch within 30 seconds after the doors are unlocked using the transmitter, the ETACS-ECU will relock the doors automatically. This is called "Timer lock function." This timer lock function prevents accidental unlocking of doors. The adjustment function allows you to change the timer lock period from 30 seconds (default setting) to 60, 120 or 180 seconds. For further details on using the multi-center display (middle grade type) to adjust the timer lock period, refer to On-vehicle Service Adjustments .

NOTE:
The timer lock period begins when the doors are unlocked, and ends when the doors is relocked automatically.

TRANSMITTER





The transmitter integrated into the key is used instead of the key holder type. The transmitter integrated into the key offer the following advantages.

- The transmitter is integrated into the master key. The 4-knob button is used, and the specific secret code is transmitted as a radio wave signal.
- A brilliant silver Three-diamond mark is stamped on the backside of the key grip.
- An indicator light, which illuminates when signals are received, is added on the key grip. This indicator lamp informs you of the signal transmission status and warns you of a flat battery in the transmitter.
- 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 intrusion.
- The functions of the immobilizer system are integrated.