How To Replace an 8-Pin Surface Mount IC Chip on a BMW DME MSV90 Continental Computer Module.

[@dhikaramadhan2054]

hi mate, what fault code is displayed in this case?

[@TECHNOLOGYTIPS101]

Hi, sorry, but I was not the actual car mechanic who removed the computer unit. I am only the technician who replaced the IC Chip for them.

[@bfgillan]

How did you cut open the canister? Is it not possible to open it using a heat gun.

[@TECHNOLOGYTIPS101]

Unfortunately it is not possible, they had to use metal cutter very carefully not to damage the board.

[@chijiokeudeani9378]

What is the function of the ic you replaced?

[@TECHNOLOGYTIPS101]

Goos question. This is a TJA1020 LIN chip. The TJA1020 is the interface between the LIN leader/follower protocol controller and the physical bus in a Local Interconnect Network (LIN). It is primarily intended for in-vehicle sub-networks using baud rates from 2.4 up to 20 Kbaud. The transmit data stream of the protocol controller at the TXD input is converted by the LIN transceiver into a bus signal with controlled slew rate and wave shaping to minimize EME. The LIN bus output pin is pulled HIGH via an internal termination resistor. For a leader application an external resistor in series with a diode should be connected between pin INH or pin BAT and pin LIN. The receiver detects the data stream at the LIN bus input pin and transfers it via pin RXD to the microcontroller. In normal transceiver operation the TJA1020 can be switched in the normal slope mode or the low slope mode. In the low slope mode the TJA1020 lengthens the rise and fall slopes of the LIN bus signal, thus further reducing the already very low emission in normal slope mode. In sleep mode the power consumption of the TJA1020 is very low, whereas in failure modes the power consumption is reduced to a minimum.

[@bfgillan]

@@TECHNOLOGYTIPS101can you tell me where you obtained the replacement chip, I may have to do a similar repair. After you returned the DME to the owner, was the issue resolved? Thanks for this video.

[@TECHNOLOGYTIPS101]

@@bfgillan@bfgillan, the owner was happy, and the problem was resolved. The chips can be found on eBay.

[@anikseth8326]

Hi Khaled big fan of your channel! Would actually like to contact you for some help regarding an install we are doing. Is there anyway we can get in touch?

[@TECHNOLOGYTIPS101]

Hi, Mr. Anik yes sir you can get in touch with me using the contact us on your web page buygreeninc.com