User's Manual

B2NA0 USER MANUAL - COMPLIANCE DOCUMENT v1
Product
BCM Module 125kHz
Model
B2NA0
Year
2022
Manufacturer
Denso International America, Inc.
1. General description
The Passive entry passive start system is composed of a BCM (Body Control Module-B2NA0), a
maximum of 8 antennas, a UID (User Identification Device), and an RF Receiver. It is used for locking
or unlocking the vehicle’s door or starting the vehicle’s engine. I.e: When a valid user is identified, the
system locks or unlocks the vehicle’s door or starts the engine.
The BCM is installed in the vehicle and transmits low-frequency wave signals. Depending on the
operational mode, it can use from 1 up to 3 of the installed antennas.
The second generation of BCM employs ASK/OOK for transmission of signaling and challenge data
(UID), operating over a single channel at the frequency of 125 kHz with a rated output power 1.58 mW
or less.
The RF output power of this device is variable according to the mechanics of the key fob approaching
the BCM, which means that it can operate using half-bridge configurations and full-bridge
configurations at a maximum of 3 antennas at the same time, there are several antennas configurations
according to the car size. There is not any internal software regulating the BCM or antenna’s behavior.
There are 3 different transmission types that can be used in vehicle applications.
- PEPS (Passive Entry, Passive Start)
- Approach Mode
- Immobilizer Mode
Notes:
- The BCM device can not be operated stand-alone in its intended use. - For intended use of the
BCM device, a data connection to the host vehicle is required. - The BCM equipment is not
available to the end-user. The equipment is manufactured by
Denso International America, Inc and sold to the relevant vehicle manufacturers. - Damaged
BCM’s on a vehicle can only be replaced by the vehicle manufacturer’s professional authorized
repair workshops as calibration and adjustment with dedicated tools are required after the
replacement.
2. Components