REnault laguna 1994 immo off

[fanos]

Hi all! I have a '94 Laguna 2l engine, but I lost the only key. Can be immo off? ECU is Siemens S101727104 HOM7700860316 BVA / BVM. Thanks in advance

[jacostanzo]

Is IR or transponder key?
I think is IR key, in this case reed MC68HCP11E, write FF in the 2 first lines and cut immo line, from ecu pin 29. Works 100%

[fanos]

With the program can read / write HC11E1? With Xprog+adapter we did.

[luiggii79]

With the program can read / write HC11E1? With Xprog+adapter we did.

desolder those processor and you read use adaptor ,
you listen the checksum (read repetedly and compare)
if do not same ,the processor is bad

[fanos]

So I did, it seems that the processor is... dead :dong:

[jacostanzo]

You can read on board.
Bridge MCU pins 1, 2 and 3.
Pin 17 - RESET
Pin 20 ? RXD
Pin 21 ? TXD
Pin 26 - +5V.

File size is 512 bytes.

[alfabit]

So I did, it seems that the processor is... dead :dong:

Bad, bad idea to desolder... That ecu can be decoded with reno immo hand device, don`t even need to open the case.
Decoded electronically, no need screwdriver.
But now,....next time you`ll know.
Ecu dead, find a sh one and decode it with that tool.

[Am1n-0s]

You can read on board.
Bridge MCU pins 1, 2 and 3.
Pin 17 - RESET
Pin 20 ? RXD
Pin 21 ? TXD
Pin 26 - +5V.

File size is 512 bytes.

who have tested that step upper ?

[karanja]

hi jacostanzo

i tried your idea it works 100000000000000% to read this processor with xprog need to select and read it MC68HC11E9(W/SECURITY 0F36W) THEN CUT WIRE 8 ON ECU THEN JOB DONE

REGARDS

[Positron2200]

Hello Dears. What pin is really necesary cut for done immo off 29 or 8 ?