Nissan Altima 2007-2012 Service Manual: B2557 vehicle speed
Description
BCM receives the 2 vehicle speed signals via CAN communication. One 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-433, "DTC Logic".
• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to SEC-434, "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-465, "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".
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:
Power steering
WARNING
● If the engine is not running or is turned
off while driving, the power assist for
the steering will not work. Steering will
be harder to operate.
● When the power steering warning light
illuminates with the engine running,
there will be no power assist for the
steering. ...
Power window main switch
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH
Wiring Diagram
Fail Safe
FAIL-SAFE CONTROL
Switches to fail-safe control when malfunction is detected in encoder signal
that detects up/down speed and
direction of door glass. S ...
USB interface (models with Navigation System)
Connecting a device to the USB input
jack
WARNING
Do not connect/disconnect or operate the
USB device while driving. Doing so can be
a distraction. If distracted you could lose
control of your vehicle and cause an accident
or serious injury.
CAUTION
● Do not force the USB device int ...