24 MarIntegrated Communication Optical Module(ICOM)

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Introduction

The Integrated Communication Optical Module (ICOM) is set of powerful vehicle inter- faces to be used with the Integrated Service Information Display (ISID) device. The ICOM Scanner consists of the following components:

1 ICOM A is the basic component. Physically, it provides the interfaces for connec-tion to the vehicle OBD II diagnostic interface on the one hand and the interfaces for adaptive integration into the workshop network on the other. A powerful com- puter core enables it to work as a protocol converter to assume the data inter-change between the tester and the vehicle control units as well as the signal pro-
cessing for connection of the measurement system (IMIB). The power is supplied by KL 30 across the vehicle interface.

2 ICOM B is the external MOST (Media Oriented Systems Transport) interface for the ICOM A. It is connected to the ICOM A using the supplied USB cable or a com- mercially available USB cable of the type A-B. The power is supplied across the ICOM A by way of a USB cable connection.

3 ICOM C is an intelligent interface adapter that adapts the physical OBD II to the BMW circular socket. As an extended supplementary module, it connects ICOM A to vehicles without an OBD II female interface. The power supply is supplied at the vehicle by way of KL 30 from the BMW 20 pin circular socket.

ICOM A

The ICOM A is the basic component. Physically, it provides the interfaces for connection to the vehicle OBD II female diagnostic interface connector. A powerful computer core enables it to work as a protocol converter to assume the data interchange between the tester and the vehicle control units as well as the signal processing for connection of the measurement system (IMIB). The power supply is supplied by way of KL 30 across the vehicle interface. The ICOM A is specified rated in electrical operation for a minimum voltage of 8 V. Stable operation is only ensured if the power supply is above the mini- mum voltage limit.

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ICOM A Vehicle Interfaces
ICOM A vehicle interfaces to the female 16 pin OBD II vehicle socket.

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ICOM A can be connected to the workshop network by a Ethernet LAN cable or wireless connection by WLAN. The maximum data rate is 100 Mbit/s.

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The IMIB can be connected by way of a LAN connector to the ICOM A.The communication for the MOST Bus is supplied by ICOM B. For this purpose ICOM B is to be connected with the ICOM A by way of a supplied USB cable. The host communication is thru either a workshop network LAN connection or WLAN.

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ICOM B

The ICOM B is the external MOST (Media Oriented Systems Transport) interface of the ICOM A. It is connected to the ICOM A using the supplied USB cable or a commercially available USB cable of the type A-B. The power is supplied across the ICOM A by way of a USB cable connection.

During electrical operation, the ICOM B is only operational when the ICOM A is being supplied with a minimum voltage of 8 V. If a cable other than that which is supplied is used for the data connection for the ICOM A. The cable must complies with the USB 2.0 High Speed specification and is free of mechanical damage of any kind.

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Note: Initially ICOM B will not be used for diagnostics. It is therefore, not supported by Integrated Service Processes Application 2.x.

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ICOM C

The ICOM C is an intelligent interface adapter that adapts the physical 16 pin female OBD II socket to the BMW 20 pin circular socket. As an extended supplementary mod-ule, it connects ICOM A to BMW vehicles which do not have a 16 pin OBD II female
interface. (older vehicles from the model E30 onwards). The power is supply from the vehicle by way of KL 30 (+) of pin 14 of the BMW 20 pin circular socket.

The ICOM C is rated for electrical operation of a minimum voltage of 8 V. The voltage at KL30 is routed inside the ICOM C to the OBD II. This is how power provided to the ICOM A. Stable interaction of both devices (ICOM A2 & ICOM B) is only ensured when
the vehicle’s battery voltage is maintain above the 8 V minimum limit.

The BMW 20 pin round diagnostics connector contains a microprocessor that adapts the read data from the vehicle to the data format of ICOM A. (a protocol convertor)

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