Nissan Altima 2007-2012 Service Manual: B2557 vehicle speed

Description

BCM receives the 2 vehicle speed signals via CAN communication. 1 signal is transmitted by the “unified 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 SEC-36, "DTC Logic".

• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to SEC-37, "DTC Logic".

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1. Drive the vehicle at the vehicle speed of 10 km/h or more and wait for at least 10 seconds.

2. Check “Self diagnostic result” with CONSULT-III.

Is DTC detected? YES >> Refer to SEC-74, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

1.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Check “Self diagnostic result” with CONSULT-III. Refer to BRC-51, "DTC No. Index" (ABS), BRC-121, "DTC No. Index" (TCS/ABS) or BRC-223, "DTC No. Index" (VDS/TCS/ABS).

Is the inspection result normal? YES >> GO TO 2

NO >> Repair or replace malfunctioning parts.

2.CHECK UNIFIED METER.

Check unified meter. Refer to MWI-4, "Work Flow".

>> Inspection End.

    B2556 push-button ignition switch
    Description The switch that changes the power supply position. BCM maintains the power supply position status. BCM changes the power supply position with the operation of the push-button ignition ...

    B2560 starter control relay
    Description Starter control relay, integrated in IPDM E/R, permits the starter relay operation when in N or P position and the steering is locked or unlocked. It is installed in parallel with the ...

    Other materials:

    Multiport fuel injection system
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *1: This sensor is not used to control the engine system under normal conditions. *2: This signal is sent to the ECM through CAN communication line. *3: ECM determines the start signal status by the signals of engine speed and ...

    B2601 shift position
    Description BCM confirms the shift position with the following 2 signals. • CVT selector lever • P position signal from IPDM E/R (CAN) DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to SEC-4 ...

    Terms
    It is important to familiarize yourself with the following terms before loading your vehicle: ● Curb Weight (actual weight of your vehicle) - vehicle weight including: standard and optional equipment, fluids, emergency tools, and spare tire assembly. This weight does not include passen ...