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Unichip77
16th October, 2016, 05:31 PM
Hello,

I need your generous help about a Volvo XC90 2.5 Turbo petrol car.
Recently bought ECO tuning file for the car and the problem is that it only starts once.
At the second try the engine don't crank, ECU light is not on and the message on the dash: "Immobilizer problem see the manual".
If I disconnect the ECU and back it starts again but only once. ORG file works fine.
29F800BB is the flash.
ECU: 0261208289software1039S05977

The tuner told he did not change any Immo related things.
Can somebody take a look and help to fix it if possible.

Regards
Unichip77
http://www.megalarm.hu/chiptuning/XC9025T ECO.MOD
http://www.megalarm.hu/chiptuning/XC9025T.ORG

gad3n
16th October, 2016, 06:52 PM
try this ...

BR404097

waldi1979
16th October, 2016, 09:04 PM
Probably checksum problem.

luca22
16th October, 2016, 09:51 PM
Probably checksum problem.

You are right :)

One of the chs is not calculated propely

Regards
Luca

Unichip77
17th October, 2016, 11:32 AM
try this ...

BR404097


Hi,

it is just fine, thank you.:)


Regards

gad3n
17th October, 2016, 06:26 PM
no problem mate ... i just corrected checksum