• |
Passive unlock via door driver side and passenger side
|
• |
Passive locking via door driver side and passenger side
|
• |
Passive start
|
• |
Passive access trunk via the trunk lid switch at the trunk
|
• |
Passive locking via tailgate
|
• |
Max. 2 fobs can be handled by the system
|
• |
Immobilizer backup antenna integrated into SSB for TP authentication
(i.e. limp home mode)
|
• |
Communication with engine management system
|
• |
LF-RF communication
|
1. |
Passive unlock
The system allows the user to access (unlock) the vehicle without
performing any actions with the SMART KEY FOB. This feature could be
different depending on platform as follows:
|
2. |
Passive locking
The system allows the user to lock the vehicle by pushing a button
on door handle with the SMART KEY FOB.
|
3. |
Button start
The system allows to switch the power modes (Off, Accessory, Ignition),
as well as to start and stop the vehicle’s engine without performing
any actions with the SMART KEY FOB. See Button Engine Start system specification.
|
4. |
LIMP HOME Mode
Additionally, the system offers so called “limp home mode”, which
is the user can operate all vehicle functions by pushing the key into
the SSB.
|
• |
Power supply
|
• |
Microcontroller with FLASH Memory
|
• |
Single Line Interface to EMS
|
• |
Input stage
|
• |
LF antenna amplifier/driver
|
• |
CAN communication with BCM
|
• |
Passive functionality: receives LF-challenge and sends automatically
RF response.
|
• |
Classic RKE function by action up to 3 push buttons.
|
• |
Transponder-functionality in case of a flat battery or a disturbed
communication.
|
• |
LED for operation feedback and battery monitoring.
|
The FOB's LED indicator may continue to light even with a low
transmitter battery.
If the performance or range of the FOB is less than expected,
check the transmitter battery.
|
1. |
Emitting LF Antennas:
Inductive antennas in and at the vehicle are used to transform
the current, driven by the SMK ECU antenna driver, into a 134.2 kHz
magnetic field, which is the carrier for the SMART KEY challenge.
Three antennas cover the vehicle’s exterior: two antennas in the
Door Handles (DS and PS) cover the area around the doors; one antenna
in the rear bumper covers the area around the trunk.
Up to two antennas cover the vehicle’s interior and the trunk
interior: one in the passenger compartment and one in the trunk.
|
2. |
Bidirectional Immobilizer Antenna (for Limp Home):
The Immobilizer Backup Antenna is used for sending and receiving
data: it emits a magnetic field (134.2 kHz challenge) and receives changes
in the field strength (response of Transponder).
|
Hands Free Switch Inspection
1.
Check the hands free remote control switch for resistance between
terminals in each switch position.
Switch
Connector
...
Steering Column and Shaft Disassembly
Universal joint assembly
1.
Loosen the bolt (A) and then disconnect the universal joint assembly
from the steering column assembly.
Tightenin ...
Seat Belt Switch Inspection
1.
Remove the connector from the switch.
2.
Check for continuity between terminals.
Seat belt condition
Continu ...