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EC-42
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
CAN Communication Unit BBS0019E
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN COMMUNICATION UNIT
TYPE 2
System Diagram
Input/output Signal Chart
T: Transmit R: Receive
Body type Wagon
Axle 4WD 2WD
Transmission M/T A/T M/T A/T M/T
Brake control ABS ESP ABS
CAN system type 2 3 5 6 7
ECM ×××××
TCM ××
ESP/TCS/ABS control unit ××
ABS actuator and electric unit (con-
trol unit)
×× ×
Steering angle sensor ××
4WD control unit ××××
Combination meter ×××××
PKIA6458E
Signals ECM
ABS actuator and
electric unit
(control unit)
4WD control unit Combination meter
4WD mode indicator lamp signal T R
4WD warning lamp signal TR
A/C compressor feedback signal T R
ABS warning lamp signal T R
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