User's Manual

PEPS User Manual
Product name: PEPS （Passive Entry Passive Start Control Unit）
Type: SGMW CN202S
The Passive-Entry-Passive-Start (PEPS) controller is the core of an immobilizer
system. It provides wired and wireless communications, control and logic functions
between the PEPS and EMS. The whole immobilization system can be divided into
three parts: in-front authentication, in-middle steering unlock and in-end
immobilization.
1) In-frond authentication: When the user triggers the micro-switch on driver door or
on co-driver door, the PEPS system will search the valid key fob nearby the car. The
searching procedure can be done with sending LF challenges (step, 125 KHz) and
receiving the responses (step, 433.87MHz). If a valid key fob is nearby the car, the
user can open the door and prepare to start the car.
2) In-middle steering unlock procedure: The steering column of the vehicle is
blocked by electronic steering column lock (ESCL). When the system passes the in-
front authentication process and the car user presses the start-stop-button (SSB), a
ciphered communication between PEPS and ESCL will be performed. HITAGII
standard is utilized to guarantee the encryption strength of the system.
3) In-end immobilization: When the user presses the start-stop button and the brake
pedal, the PEPS system will search the valid key fob in car. The procedure is the same
as the in-front authentication. Only if the key fob has no enough power supply, a
backup strategy will be used, i.e. the immobilizer with base station integrated in PEPS
system can authenticate with the transponder in the key fob. The user can put the key
fob nearby the coil and then press the start-stop button to ignition on. When ignition
ON, the in-end immobilization process will be executed by PEPS instructing EMS to
start the engine over a secure communications link.
From above, the PEPS system is able to inhibit engine starting when an
unauthorized starting attempt is made either through mechanical force or bypassing of
the ignition circuit, thus greatly improving the prevention of unauthorized use.
Furthermore, diagnostic services are provided with fault code storage and reporting to
reduce workshop troubleshooting time.
Description: see below
Specifications: N/A
Power supply mode: DC 12V
Caution for fire and water!
Working temperature: -40℃~85℃
Storage temperature: -40℃~95℃
Manufacturer: Shanghai NAEN Automotive Technology Co.,Ltd