Intelligent Key Unit B2551 - B2563

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.

CONSULT display	Description
B2551: STEERING LOCK UNIT	Even if the communication with steering lock unit is normally performed, the steering lock is malfunctioning.
B2552: INTELLIGENT KEY	Internal malfunction is detected in Intelligent Key unit.
B2553: IGN POWER CIRCUIT	It continues for 2 seconds or more that ON power supply input to Intelligent Key unit is excessively low when the power supply position is in ON position.
B2554: ACC POWER CIRCUIT	It continues for 2 seconds or more that ON power supply input to Intelligent Key unit is excessively low when the power supply position is in Acc or ON position.
B2555: STOP LAMP CIRCUIT	5V or less is detected at both the stop lamp switch signal input circuit that is input to Intelligent Key unit and the monitor input before stop lamp switch.
B2556: ENG START SW	Condition that push-button ignition switch is pushed is detected continuously for 100 seconds or more.
B2557: VEHICLE SPEED	Some differences occur on one or more vehicle speed input of Intelligent Key unit.
B2558: SHIFT POSITION	There is a difference between the shift position input via CAN communication and the P position input by detente switch. Vehicle speed (5 km/h or more) is detected continuously for 10 seconds of more even if the shift position is detected in P position when the power supply position is in ON position. -
B2559: PDU	Internal malfunction is detected in PDU.
B2560: START POW SUP CIRC	Though the engine start operation is not performed, starter relay in IPDM E/R is on.
B2562: LOW VOLTAGE	Battery power supply input to Intelligent Key unit (8.8V or less) is detected continuously for 1.5 seconds or more.
B2563: HI VOLTAGE	Battery power supply input to Intelligent Key unit (18V or more) is detected continuously for 90 seconds or more.