No communication in immobilizer system

[Abel]

good day people,
i am new to this forum and i need help.

i bought a second hand Toyota Aristo 2JZ GE, 2000 model this year in march, after using it for 3 month, one morning it just would not start. Engine Cranks but does not start. The diagnosis machine came up with " no communication in immobilizer system" i have tried the recommended auto electricians who have failed me. the ECU and the KEY has been "re-programed" and the transponder was recently replaced but still nothing has worked.

please help me.

[Daddio]

Given it cranks, suggests the issue is possibly not the actual immobiliser (since the immobiliser isolates the starting circuit as well as fuel & ignition)...perhaps try bridging Fp and B+ in the diagnostic port to check if the fuel pump ECU is the culprit....?

[Abel]

Thank you sir for taking the Interest in the matter I will give that a try.