Diagnosis Description
WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
Though the power supply switching control to ON position by push-button ignition switch operation is performed normally, if there is no ON power supply input to the Intelligent Key unit, B2553 ignition power supply system judges it is the malfunction and displays the DTC (Diagnostic Trouble Code)