Can Communication System Description - Suzuki SX4 Service Manual

CAN Communication System Description

ECM (1), ABS / ESP® control module (2), BCM (3), combination meter (4), keyless start control module (if equipped
with keyless start control system) (5), 4WD control module (for 4WD model) (6), steering angle sensor (ESP® model)
(8), yaw rate / G sensor (ESP® model) (9) and TCM (for A/T model) (7) of this vehicle communicate control data
between each control module.
Communication of each control module / sensor is established by CAN (Controller Area Network) communication
system.
CAN communication system uses the serial communication in which data is transmitted at a high speed. It uses a
twisted pair of two communication lines for the high-speed data transmission. As one of its characteristics, multiple
control modules can communicate simultaneously. In addition, it has a function to detect a communication error
automatically. Each module reads necessary data from the received data and transmits data. ECM communicates
control data with each control module as follows.
[A]
9
6
4
8
5
[B]
6
4
5
[A]: Non-Taiwan model
[B]: Taiwan model
Engine General Information and Diagnosis:
10
11
10
11
10. CAN junction connector
11. DLC
1A-9
S7RW0A1101006
7
1
2
3
7
1
2
3
I7RW0A110002-01