Lexus gs400 1998 ignition switch turned all the way to the start position, occasionally nothing happens won't start. Battery checked OK, cables clean and secured to battery terminals, headlights work. What can it be, loose connection to ignition switch? internal ignition switch contact problem? other?

Hi,

Sounds to me like either an Immobilisor or Key transponder issue.

Have your vehicle's OBD2 body computer checked for diagnostic codes by your nearest authorised agent - 90% of faults are monitored by this computer.

Checking for codes only takes 15mins (providing the technician knows what he is doing) and will save you unecessary expense.


Cheers,