Car Does Not Start Half The Times Because Of Immobilizer ?

[lookludo]

Corolla 2006, 1,4 D

Today car came back from car dealer.

No mechanical problems with Battery or starting engine.

When inserting the (original) key the red security check light goes away but car does not start always. Somethimes the car starts the first time, somethimes after 10 tries.

But today the toyota dealer found out something interesting !

When the computer is connected with the obd, the car does start normally IF the computer gets a good connection with OBD. Sometimes the computer cannot connect to OBD and that's when the car fails to start.

My Toyota dealer has no solution at this moment :( , he thinks it maybe is a problem with the cable/connection to the immobilizer...

Someone a suggestion?

As said before, original keys and the red security check light goes away when inserting key.

When i have a good connection to OBD there are no error codes

[lookludo]

Allready one interesting issue: same problem exists with spare key :(