Nissan Altima (L32) 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:
Precaution
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
dr ...
Front power seat adjustment
(if so equipped)
Operating tips
The power seat motor has an auto-reset
overload protection circuit. If the motor
stops during operation, wait 30 seconds
then reactivate the switch.
Do not operate the power seat switch for
a long period of time when the engine is
off. This will discharge the battery.
For add ...
P1805 Brake switch
Description
Brake switch signal is applied to the ECM via the stop lamp switch when the
brake pedal is depressed. This
signal is used mainly to decrease the engine speed when the vehicle is being
driven.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION ...