Nissan GT-R (R35) · Service Manual BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY

B2557 VEHICLE SPEED

INTELLIGENT KEY SYSTEM

B2557

Description


BCM receives the 2 vehicle speed signals via CAN communication. 1 signal is transmitted by the “combination meter” Another signal is transmitted by “ABS actuator and electric unit (control unit).” BCM compares both signals to detect the vehicle speed.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
  • If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Logic.
  • If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Logic.

DTC
 		Self-diagnosis name
 		DTC detecting condition
 		Possible causes
B2557
 		VEHICLE SPEED
 		BCM detects the following difference between the vehicle speed from “combination meter” and the one from “ABS actuator and electric unit” for 10 seconds continuously.
  • One is 10 km/h (6.2 MPH) or more and the other is 4 km/h (2.5 MPH) or less.
  • Wheel sensor
  • Combination meter
  • ABS actuator and electric unit (control unit)

 
 DTC CONFIRMATION PROCEDURE

 
 1.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
 
 2.CHECK DTC WITH “COMBINATION METER”
 
 3.CHECK INTERMITTENT INCIDENT