NIDEC MOBILITY G8D-671S-B Keyless Entry System User Manual
OMRON Automotive Electronics Co. Ltd. Keyless Entry System
User Manual
G8D-671S-B
Receiver, RF Keyless Entry System
Table of contents
1. Constitution of the Radio Frequency Keyless Entry system with Door Lock
Controller for vehicle ...................................................................................... 1
2. User’s manual (provisionally) .......................................................................... 2
3. Block diagram ................................................................................................ 3
4. Specification ................................................................................................... 4
5. Features .......................................................................................................... 5
6. PCB ................................................................................................................ 6
6.1 Parts layout ................................................................................................. 6
6.2 Pattern layout .............................................................................................. 7
7. Connector ..................................................…................................................. 9
1. Constitution of the Radio Frequency Keyless
Entry
System with Door Lock Controller for vehicle
The radio frequency keyless entry is a system that it controlls locking and unlocking the door
by wireless remote controller. This system consists of two components. The TRANSMITTER is a
device that transmits the signal when the button is pressed. The transmission signal consists of
several synchronous codes, unique identification code, security code and function code. The
RECEIVER is fixed inside the vehicle. It works intermittently to prevent the battery exhaustion.
When the receiver detects the synchronous code, it runs continuously to receive the signals
completely. After receiveing the signal, the receiver decides which operation will be performed. The
user can select the following operations by pressing the button of the remote transmitter.
OPERATION ACTION
LOCK Lock the door
UNLOCK unlock the door (the driver side first, then all doors)
PANIC Beep the horn and flush the small light. (it continues 30 seconds)
This receiver also controls wired operation. It is available to control the door lock status by
using the silcon switch or the remote door control switch (both driver’s and passenger’s side).
Transmitter
f = 315.1MHz
2. User’s manual (provisionally)
REMOTE TRANSMITTER
You can lock and unlock your vehicle with the remote transmitter.
LOCK
When you push the LOCK button, all the doors will lock.
You cannot lock any of the doors with the remote transmitter if the key is in the ignition switch.
UNLOCK
When you push the UNLOCK button once, all the door s will unlock. If you unlock the doors
with the remote transmitter, but do not open any of the doors within 30 seconds, the doors will
automatically relock.
You cannot unlock any of the doors with the remote transmitter if the key is in the ignition
switch.
PANIC MODE
Panic mode allows you to remotely sound your vehicle’s horn to attract attention. To activate
this mode, press and hold the PANC button for about one second. Your vehicle’s horn will
beep for about 30 seconds.
To cancel panic mode before 30 seconds, press any button on the remote transmitter. You can
also turn the ignition switch to ON.
Panic mode will not activate if the ignition switch is in ON.
4. Specification
4.1 CPU
Type Μ37540(8bit)
Manufacturer: MITSUBISHI
ROM 16K bytes
RAM 512 bytes
EEPROM（Outside） 2K bytes
Clock frequency 7.37MHz
Clock frequency generation Ceramic resonator
Package 32pin QFP
4.2 RF block
Local clock frequency 325.8MHz
Frequency generation Crystal resonator
Modulation FSK
Bandwidth ±200KHz
Carrier Detect Sensitivity 41 dBuV
4.3 Others
Dimension 80 mm× 70 mm×25 mm
Weight 87 g
Battery Car Battery (DC 12V)
Operation Voltage DC 12V, 10mA
Operation temperature -30℃ ~ +80℃
5. Features
5.1 Integrated controller
The controller works both wireless and wired operation.
You can use it remotely as the receiver of the keyless entry system. You can operate the door
lock remotery using the remote transmitter. It is also avialable to release the boot.
When you turn the door lock switch, the controller works as the door lock controller. The
controller monitors the switch related to the door lock. In case of the status of the switch changed,
the controller will detect and output the signal to the door lock actuator.
5.2 Battery saving
The receiver works intermittently to reduce the battery consumption. The microcomupter
mounted on the receiver controlls the power supply for the RF circuit. In case of the microcomputer
detects the wake-up signal during the power supplied, the microcomputer continue supplying the
power until the data frame will be received.
