BOSCH MQB 37W BR22 Radio Frequency Transceiver User Manual
- June 9, 2024
- Bosch
Table of Contents
BOSCH MQB 37W BR22 Radio Frequency Transceiver
Homologation: Radio Frequency Transceiver
Marketing Name
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MQB37W
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Equipment Product Code
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BR22
Customer
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VW AG.
Number offer drawing
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F005VS0400
Manifacturer
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Robert Bosch GmbH Daimlerstraße 6.
71229 Leonberg Germany
Functional Description of radio frequency transceiver for MQB BCM
- Product: BCM (Body Computer Module)
- Brand Name: Bosch
- Model Name: BR22
- Hardware version: HW35
General Description
The radio frequency transceiver is part of a body computer ECU. The ECU incorporates several HW inputs and HW outputs, which monitor and control body computer functionalities in a car (e.g. light control and central door locking). The ECU consists of a plastic housing, PCB, electronic components, and connector pins. The radio frequency transceiver functionality will be explained in more detail in the below-documented sections.
HW Interface
The radio frequency transceiver is supplied via the specified connector pins.
The antenna of the radio frequency transceiver is a PCB-edge antenna, which is
incorporated into the PCB of the ECU
Connector Position on housing
Supply and GND pins
- Supply (+) : Pin-No# A66, A73, C1, C73
- GND (-) : Pin-No# A63, C63
LED+ Pin is connected to Pin A59.
Normal Operating conditions
- Supply Voltage: 9V to 16V, type. 12V
- Environment Temperature : -40°C to +80°C
System Block Diagram MQB37W BCM
The below-drawn block diagram of the MQB BCM shows the main function blocks of
the ECU.
In section 0, the design of the radio frequency transceiver is outlined
Block Diagram of inbuilt Radio Frequency
Transceiver
The radio frequency transceiver has the following key
data
Functional description
The radio frequency transceiver is part of a remote keyless entry system of a
vehicle’s central door locking system.
This vehicle’s central door-locking system consists out of
- Remote control key with UHF transmitter (NOT part of the MQB BCM)
- Radiofrequency transceiver with PCB-Antenna (part of the MQB BCM)
- Door ECU, which can drive the car door locks to lock or unlock the car (NOT part of the MQB BCM)
- Door locks for the central door locking functionality (NOT part of the MQB BCM
The transceiver has a self-polling mode and is permanently scanning for valid
key data, with matching characteristics.
(Note : This data is typically received when a valid remote control key
is in range and one of its push buttons is pressed.)
When the data are matching the characteristics, the transceiver will hand over
this data to the microcontroller of the MQB BCM. With the help of this
microcontroller, it is validated, whether this data has been transmitted from
the authorized remote control key. When the validation was successful, the MQB
BCM will send this information via a CAN network to the door ECU. This door
ECU will drive the connected door lock according to the wish of the operator,
who pressed the push button of the remote control key. Hence the doors will be
locked or unlocked. The MQB BCM needs to be programmed by the OEM, after
installing the ECU into the car. Once programmed, the transceiver is operable
directly after ap-plying power to the connector pins.
Regulatory notice
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation.
NOTICE
Changes or modifications made to this equipment not expressly approved by
Robert Bosch GmbH may void the FCC authorization to operate this equip-ment.
for Canada
RSS-GEN, 8.4
This device contains license-exempt transmitter(s)/receiver(s) that comply
with Innovation, Science, and Economic Development Canada’s license-exempt
RSS(s). Operation is subject to the following two conditions:
- This device may not cause interference.
- This device must accept any interference, including interference that may cause undesired operation of the device.
Product pictures
Bottom side
Installation position in the vehicle
BCM with mounting bracket
Documents / Resources
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BOSCH MQB 37W BR22 Radio Frequency
Transceiver
[pdf] User Manual
BR22, 2AAJCBR22, MQB 37W BR22 Radio Frequency Transceiver, MQB 37W BR22, Radio
Frequency Transceiver, Frequency Transceiver, Transceiver
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