Description
BCM receives the 2 vehicle speed signals via CAN communication. One 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 SEC-29, "DTC Logic".
If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to SEC-30, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
Drive the vehicle at the vehicle speed of 10 km/h or more and wait for at least 10 seconds.
Check "Self Diagnostic Result" with CONSULT.
Diagnosis Procedure
1.CHECK DTC WITH "ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)"
Check "Self Diagnostic Result" with CONSULT. Refer to BRC-82, "DTC No. Index".
2.CHECK COMBINATION METER.
Check combination meter. Refer to MWI-4, "Work Flow".
Inspection End.
Driver seat control unit
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CONSULT MONITOR ITEM
*: The value at the position attained when the battery is connected is
regarded as 32768.
TERMINAL LAYOUT
PHYSICAL VALUES
Fail Safe
The fail-safe mode may be activated if the following symptoms are observed.
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CAN communication system
System Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and excellent error
detection ability. Many electronic
control units are equipped onto each vehicle, a ...
Encoder
DRIVER SIDE
DRIVER SIDE : Description
Detects condition of the front power window motor LH operation and transmits
to main power window and door
lock/unlock switch as pulse signal.
DRIVER SIDE : Component Function Check
1. CHECK ENCODER OPERATION
Check that front door glass LH performs AUTO ...