What is BDM Adapter & How to use?

ECU Chip Tunning

KTAG KESS KTM BDM adapter Full Set is an electronic circuit intended for BDM operation on supported ECU. The adapter provides pogo pin based connectors for interfacing the ECU BDM connector. Interfacing the supported tool is made by the use of intermediate circuit board (multiplexer) that connects to the adapter over the MUX connector and to the tool over the desired tool connector (FGTECH, XPROG, BDM100,Dimsport, KTM100, Kess V2 & KTAG, etc.)

BDM-adapter-1 BDM-adapter-2

A BDM adapter full set includes 22pcs  (support Denso, Marelli, Bosch, Siemens)

1 14AM00T01M Bosch

2 14AM00T02M Delphi DCM

3 14AM00T03M Bootloader ST10xx

4 14P600KT04 Infineon Tricore EDC/MED17

5 14AM00T05M Marelli MPC55xx JTAG

6 14AM00T06M Delphi MPC55xx JTAG

7 14AM00T07M Denso CN1 Boot

8 14AM00T08M Denso CN2 Boot

9 14AM00T09M Denso CN3 Boot

10 14AM00T10M Denso CN1 AUD

11 14AM00T11M Denso CN2 AUD

12 14AM00T00M Delphi DCI

13 14AM00TBAS Base Adapter 1.27

14 14AM00T14M NexusEFI T6 Lotus

15 14AM00TB02 Magneti Marelli BDM insert

16 14AM00TB01 Siemens BDM insert

17 14AM00TB03 EDC7 BDM insert

18 14AM00T18M Magneti Marelli MPC/SPC56xx

19 14AM00T13M Nexus MPC5xx TRW ECU

20 VAG 1.6tdi – Siemens-Continental PCR2.1

21 14AM00T15M Toyota NEC76F-20

22 14AM00T16M Toyota NEC76F-26


Src: http://www.chinacardiags.com/wholesale/ktag-kess-ktm-dimsport-bdm-probe-adapters-full-set.html

So, how to use DM adapters with Ktag Kess KTM100 Dimsport?

Steps outlined below describe a safe procedure when connecting and powering up the setup. Always be sure to provide the ECU power (from either tool or external source) after the adapter has been secured in a desired position – touching the ECU BDM pads. This will prevent you from short circuiting the setup.

  1. Open the ECU
  • at least one part of the casing (top or bottom) needs to be removed
  • refer to other sources (Internet) to get information on which part needs removing on your


  1. Locate the ECU BDM connector
  • usually a set of 10 – 12 pads in two rows (depending on the ECU)
  • pads may be 2.54 mm or 1.27 mm apart (depending on the ECU)
  • rows may be 2.54 mm or 5.08 mm apart (depending on the ECU)
  • if the ECU BDM connector can not be located, chances are that the BDM pads are scattered

all over the ECU PCB in which case you can not use the adapter directly – nevertheless it is

possible to manually route the adapter BDM signals to the ECU BDM pads (only for

advanced users)

  1. Locate the ECU BDM pin 1 position
  • pin 1 is usually not clearly marked on the ECU BDM pin out
  • on an ECU with the standard Motorola BDM pin out pins 3 and 5 are connected to ground –

this can be checked either visually or using a multimeter tool

  • refer to other sources (Internet) to get more information on the pin 1 position for your ECU
  1. Place the desired adapter in the frame saddle
  • make sure the pogo pins are facing out
  • lift the saddle so that the ECU can be slided under the frame adapter saddle
  1. Place the ECU on the frame
  • inspect the adapter for pogo pin 1 location which is clearly marked
  • rotate the ECU on the frame so that the adapter pogo pin 1 and ECU BDM pin 1 match
  • make sure ECU is firmly sitting on the frame
  • double check the ECU position
  1. Connect the multiplexer board and adapter
  • at this point multiplexer board should be connected to the adapter via MUX connector
  • this will allow LEDs on the adapter to illuminate the area of interest (where the pogo pins

need to touch the ECU BDM pads)

  • do not connect the tool yet
  1. Connect the external power (+12 V) to the multiplexer
  • multiplexer external power is used to power the LEDs on the adapter allowing easier

positioning of the adapter pogo pins on the ECU BDM pads

  • red LED on multiplexer board will light up when external power (+12 V) is present
  • at this point the white LEDs on the adapter should also light up
  • do not connect the tool yet
  1. Fine tune the ECU position
  • lower the frame adapter saddle to almost touch the ECU BDM pads
  • each adapter pogo pin needs to sit on a separate ECU BDM pad
  • if pogo pins do not sit on the pads you may be using the wrong adapter – do not use the

adapter in this case!

  1. Lower the frame adapter saddle
  • each adapter pogo pin should sit on one ECU BDM pad
  • minimum down force should be applied when making the interconnection between the

adapter and ECU

  1. Double check the adapter pogo pin and ECU BDM pad interconnection
  • in order not to damage the ECU and/or tool make sure that the steps above have been

performed correctly

  1. Connect the tool to the multiplexer board
  • only connect one tool at any given moment to the multiplexer
  • make sure to use the correct 10-pin IDC connector (FGTECH, XPROG, BDM100&KTAG)

for interfacing the tool used:

○ use provided 10-pin to 10-pin cable with FGTECH or BDM100 tools

○ use provided 10-pin to 16-pin cable with XPROG tool

○ use manufacturer 10-pin to 25-pin cable with KTAG tool

  • do not connect the tool to the 10-pin IDC connector labeled MUX
  • do not power up the tool yet
  1. For Bosch adapteronly
  • Bosch ECUs need to have ECU power supplied on the pogo pins (2 and 9)
  • some tools provide dedicated ECU power (BDM100, KTAG) while others do not


  • Bosch adapter can be used in both cases, providing that the jumper is properly placed on

the 3-pin header (found on the adapter)

  • place the jumper on the adapter on the 3-pin header to the correct position:

○ place jumper over left and central pins when using XPROG and FGTECH tools – this will use +12 V power delivered from the multiplexer board (external power) for powering the ECU

○ place jumper over right and central pins when using BDM100 or KTAG tools – this will use

+12 V power delivered by the tool for powering the ECU

  1. For Siemens, Delphi and Marelli adapters only
  • Siemens, Delphi and Marelli do not provide ECU power on the pogo pins
  • in order to power the ECU +12 V and ground signals needs to be connected to the ECU separately (usually over the ECU interfacing connector)
  • in this case ECU power can be taken from multiplexer board connectors J2 (+12 V) and J3 (ground), otherwise provide the +12 V ECU power from additional source
  • refer to other sources (Internet) to get more information on the location of the +12 V and

ground pin location for your ECU

  1. Connect the tool to the PC (or power up the tool)
  • perform software installation as described by the tool manufacturer if not done already
  • at this point the multiplexer, adapter and the ECU should be properly interconnected with

BDM signals and power lines

○ multiplexer red LED should be lit up

○ adapter white LEDs should be lit up

○ ECU power (+12 V) should be present

  • connect the tool to the PC (usually done over USB or serial connection)
  1. Perform BDM operation(s)
  • start up the software package to operate the tool
  • perform desired BDM operation(s)Note: This is used for reference; in fact, it depends. Try on your own risk.


Here is a list of words that are used throughout the manual with corresponding explanation in order to minimize misunderstandings when reading this users manual.


is an electronic circuit board designed for a certain ECU (manufacturer), with pogo pins and a 10-pin

IDC connector for interfacing the multiplexer board.


is an acronym for Background Debug Mode, an interface designed by the Motorola company, widely

used in automotive industry, present on modern ECUs. Not all ECUs are capable of interfacing

through the BDM – see Appendix for the list of ECUs that support the BDM interface.


is an acronym for Engine Control Unit, a piece of hardware containing electronic circuit used to

control and monitor the vehicle engine operation.


is a set of pads found on the ECU, used to interconnect adapter with the ECU in non destructive

way – usually by the means of the pogo pins. Most of the ECU BDM connectors have their pads laid

out according to the standard Motorola BDM pin out. Some ECUs may have proprietary BDM pin

outs or BDM pads scattered all over the ECU PCB.


is a mechanical contraption used to fix the adapter for the BDM operation. It usually allows sliding

the adapter up and down to get it into contact with the ECU BDM connector.


is an electronic circuit board for interfacing any adapter through the 10-pin IDC connector (MUX)

with one of the supported BDM tools through the designated 10-pin IDC connector (FGTECH,



is a third party piece of equipment used for BDM operation – supported tools include


BDM probe adapter full set in details…


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Original:What is KTAG KESS KTM BDM Adapter & How to use?