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Self-Diagnostic Results

DIAGNOSTIC REFERENCE CHART

Suspect Systems [DTC] Diagnostic item is detected when... Repair work Reference
CAN COMM CIRCUIT [U1000] Malfunction is detected in CAN communication Perform CAN communication system inspection CHECK CAN COMMUNICATION SYSTEM 
CONTROL UNIT (CAN) [U1010] Malfunction is detected in CAN communication caused by Intelligent Key unit internal malfunction Replace Intelligent Key unit. CHECK CAN COMMUNICATION SYSTEM 
STRG COMM 1 [B2013] Communication malfunction with steering lock unit is detected Check steering lock unit CONSULT-III FUNCTIONS (BCM-INTELLIGENT KEY) 
STEERING LOCK UNIT [B2551] Even if the communication with steering lock unit is normally performed, the steering lock is malfunctioning Replace steering lock unit B2551 STEERING LOCK UNIT 
INTELLIGENT KEY [B2552] Internal malfunction is detected in Intelligent Key unit Replace Intelligent Key unit. B2552 INTELLIGENT KEY 
IGN POWER CIRCUIT [B2553] 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 Check Intelligent Key unit ON power supply input B2552 INTELLIGENT KEY 
ACC POWER CIRCUIT [B2554] It continues for 2 seconds or more that ACC power supply input to Intelligent Key unit is excessively low when the power supply position is in ACC or ON position Check Intelligent Key unit ACC power supply input DIAGNOSTIC PROCEDURE 
STOP LAMP CIRCUIT [B2555] 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 Check stop lamp switch B2555 STOP LAMP CIRCUIT 
ENG START SW [B2556] Condition that push-button ignition switch is pushed is detected continuously for 100 seconds or more Check push-button ignition switch SELF-DIAGNOSTIC LOGIC 
VEHICLE SPEED [B2557] Some differences occur on one or more vehicle speed inputs of Intelligent Key unit Check vehicle speed signal DIAGNOSTIC PROCEDURE 
SHIFT POSITION [B2558]
  • 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 or more even if the shift position is detected in P position when the power supply position is in ON position
 Check shift position input B2558 SHIFT POSITION 
PDU [B2559] Internal malfunction is detected in PDU Replace PDU B2559 PDU 
START POW SUP CIRC [B2560] Though the engine start operation is not performed, starter relay in IPDM E/R is ON Check starter power supply B2560 START POW SUP CIRC 
LOW VOLTAGE [B2562] Battery power supply input to Intelligent Key unit (8.8V or less) is detected continuously for 1.5 seconds or more Check battery low voltage B2562 LOW VOLTAGE 
HI VOLTAGE [B2563] Battery power supply input to Intelligent Key unit (18V or more) is detected continuously for 90 seconds or more Check for battery high voltage B2563 HI VOLTAGE 
NATS MALFUNCTION [B2590] Malfunction is detected in immobilizer system Check (IVIS) NATS trouble diagnosis procedure IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS) 
CAUTION: When CAN COMM [U1000] and CONTROL UNIT (CAN) [U1010] are displayed, give priority to performing trouble diagnosis.
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