BOSCH MQB 37W BR22 Radio Frequency Transceiver User Manual

: June 9, 2024
: Bosch

Table of Contents

BOSCH MQB 37W BR22 Radio Frequency Transceiver
General Description
System Block Diagram MQB37W BCM
Regulatory notice
Product pictures
Installation position in the vehicle
Documents / Resources

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

| 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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