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:
Washer tank
Removal and Installation
REMOVAL
1. Remove the washer tank filler tube (1).
2. Remove engine under cover.
3. Position the RH fender protector back. For Sedan Refer to EXT-40, "Removal
and Installation". For Coupe
Refer to EXT-19, "Removal and Installation" .
4. Discon ...
Road test
Description
DESCRIPTION
• The purpose of the test is to determine overall performance of CVT
and analyze causes of problems.
• The road test consists of the following three parts:
1. “Check Before Engine Is Started”TM-425.
2. “Check at Idle”TM-426.
3. “Cruise Test”TM-427 ...
Drive belts
Checking Drive Belts
1. Power steering pump
2. Drive belt auto-tensioner
3. Crankshaft
4. Idler pulley
5. A/C compressor pulley
6. Generator pulley
7. Idler pulley
8. Drive belt
A. Indicator
B. Possible use range (for new belt)
C. Belt replacement
WARNING:
Inspect and check the drive ...