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BMW yellow diagnostic head

The yellow DK or EDIC vehicle interface used with BMW GT1, DISplus and SSS.

Updated by llandowtuninguk@gmail.com   Revision 5

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The yellow diagnostic head is a separate interface between the vehicle and a BMW workshop tester. It is often called the DK head or yellow EDIC head. It is not the GT1 display, the DIS diagnostic software, or the later ICOM.

Yellow GT1-style diagnostic heads
Yellow GT1-style diagnostic heads. Image: OldBMW.ru, reproduced with permission.
Yellow GT1-style diagnostic head with its connector end visible
Yellow GT1-style diagnostic head with its connector end visible. Photograph supplied by a contributor for use on this wiki.
Yellow GT1-style head with diagnostic cables and adapters
Yellow GT1-style head with diagnostic cables and adapters. Photograph supplied by a contributor for use on this wiki.
Yellow GT1-style diagnostic interface, showing its connector end
A GT1-style yellow diagnostic interface offered for BMW vehicles; the pictured unit's manufacturer and authenticity have not been verified. Photo: GT1 Auto Scanner For BMW by obdchina.com, CC BY-ND 2.0; original image, unchanged.

How it fits

BMW's equipment guide lists the diagnostic head with GT1, DISplus and SSS. It describes direct LAN or workshop network connections and wireless options, depending on configuration. The head connects to the vehicle via the correct diagnostic cable, which may be the OBD-style or earlier BMW connector.

MOST distinction

BMW's period guide specifically says not to use this head for programming vehicles with a MOST bus. The optical OPS/OPPS heads served different requirements; confirm the period vehicle and procedure rather than assuming that any head is interchangeable.

Pictures and identification

The BMW equipment guide illustrates the diagnostic and optical heads. An independent historical article shows a yellow head. Identify surviving examples by their markings and connectors as well as colour.

Wireless hardware and board photographs

Some original heads used period wireless hardware. An independent OldBMW.ru case study describes a later Ethernet-to-Wi-Fi bridge and shows the internal boards of both a Siemens unit and a replica. The images document particular examples; identify the board and its connections rather than assuming that all heads share the same layout.

Sources

Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.