CONTROLLER AREA NETWORK (CAN) SYSTEM


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Outline

•  A CAN system has been adopted which can send and receive multiple signals over a single communication path from related modules.
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System Wiring Diagram

HS-CAN (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (L.H.D.))

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HS-CAN (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (R.H.D.))

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HS-CAN (SKYACTIV-D 2.2 (L.H.D.))

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HS-CAN (SKYACTIV-D 2.2 (R.H.D.))

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MS-CAN

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Structure

•  The CAN system consists of CAN system-related modules built into the CPU and wiring harnesses connecting related modules.

L.H.D.

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R.H.D.

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Function

•  Terminator resistors are built into the PCM and instrument cluster which form the HS-CAN between the PCM and instrument cluster.
•  Terminator resistors are built into the rear body control module (RBCM) and instrument cluster which form the MS-CAN between the rear body control module (RBCM) and instrument cluster.
•  The instrument cluster is connected to the HS-CAN and MS-CAN which communicate with each other via the instrument cluster.

L.H.D.

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R.H.D.

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Body communication function

•  The front body control module (FBCM) is located at the vehicle front, the start stop unit is located in the dashboard, the rear body control module (RBCM) is located at the rear, and lighting parts, wiper parts, each type of switch, and door lock parts in each location are each connected to three CMs, creating a three-system communication network.
•  The front body control module (FBCM) and start stop unit are connected to the HS-CAN and the rear body control module (RBCM) is connected to the MS-CAN which communicate with each other via the instrument cluster.
•  For example, when the switch connected to the start stop unit is turned ON, the start stop unit sends an operation request signal to the front body control module (FBCM) and rear body control module (RBCM), which operate the parts on the front or rear.
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•  By connecting the front body control module (FBCM), start stop unit, and rear body control module (RBCM) via the CAN, the number of wiring harness used compared to the conventional number used has decreased.
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CAN Signal Table

•  Signals transmitted using the CAN system are as follows:

HS-CAN communication table

OUT: Output (sends signal)
IN: Input (receives signal)

Signal

CAN system related module

PCM

TCM*1

AFS control module*2

4WD control module*3

Laser sensor*4

DSC HU/CM

EPS control module

Front body control module (FBCM)

Forward sensing camera*5

Instrument cluster

Start stop unit

SAS control module

Position memory control module*7

Accelerator pedal opening angle
OUT
IN
IN
IN
IN
IN
AFS OFF switch status
IN
OUT
AFS system configuration information
OUT
IN
AFS system warning light status
OUT
IN
All memory clear signal
OUT
IN
Air bag system warning buzzer status
IN
OUT
Air bag system warning light on request
IN
OUT
Air bag system-related information
IN
OUT
Ambient temperature
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
OUT
IN
Answer-back-related information
IN
OUT
AT shift position
IN
OUT
Back-up light on request
IN
IN
IN
OUT
Back-up light switch
OUT
IN
IN
IN
Battery management system malfunction determination
OUT
IN
Battery regeneration status
OUT
IN
Blower motor relay status
OUT
IN
Bonnet status (with i-stop)
IN
OUT
IN
Brake fluid level
OUT
IN
Brake light status
IN
OUT
Brake override system cancel execution signal
OUT
IN
IN
Brake pedal depressed status
OUT
IN
Brake switch (No.1 signal)
OUT
IN
IN
IN
IN
IN
Brake switch (No.2 signal)
OUT
IN
IN
IN
IN
IN
Brake switch malfunction determination
OUT
IN
Check engine light on request
OUT
IN
Cluster switch status
IN
IN
OUT
Clutch pedal stroke sensor
OUT
IN
IN
Collision detection (front, side, roll over)
IN
IN
IN
OUT
Collision detection (rear)
IN
IN
IN
OUT
Cranking start
IN
IN
IN
OUT
Cranking time
OUT
IN
Cruise control control status
OUT
IN
Cruise control set speed
OUT
IN
Cruise control switch
OUT
IN
Cruise control switch signal
IN
OUT
IN
IN
OUT
Cruise control system-related information
IN
OUT
OUT
IN
OUT
IN
OUT
IN
IN
Dimmer cancel
OUT
IN
Driver-side buckle switch status
IN
IN
OUT
IN
Driver's door status
OUT
IN
TCS OFF switch status
IN
OUT
DSC system-related information
OUT
IN
IN
OUT
IN
OUT
IN
IN
OUT
IN
OUT
IN
DPF warning light on request*6
OUT
IN
Electric AT oil pump-related signal (i-stop)
IN
OUT
Engine coolant temperature
OUT
IN
IN
Engine displacement
OUT
IN
IN
IN
OUT
IN
IN
IN
IN
IN
IN
Engine status
OUT
IN
Engine status at idle
OUT
IN
Engine torque
OUT
IN
OUT
IN
OUT
IN
IN
Engine-off time
IN
OUT
EPS status
IN
IN
OUT
IN
OUT
OUT
IN
Forward sensing camera customize request
OUT
IN
IN
OUT
Front combination light on request
IN
OUT
Front fog light information
OUT
IN
IN
Fuel cap status
OUT
IN
Fuel cut request
IN
IN
IN
OUT
IN
IN
OUT
Fuel injection amount
OUT
IN
Generator warning light on request
OUT
IN
IN
Glow indicator light on request*6
OUT
IN
Hazard warning switch information
IN
IN
IN
OUT
Headlight information
IN
IN
OUT
IN
IN
Headlight status
OUT
IN
High-beam indicator
OUT
IN
IN
Ignition off timer
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
IN
Ignition switch status
IN
IN
IN
IN
IN
OUT
IN
Immobilizer system related information
OUT
IN
IN
OUT
ID data
OUT
IN
i-stop OFF switch status
IN
OUT
i-stop status
OUT
IN
i-stop-related information (with i-stop)
IN
OUT
OUT
IN
OUT
IN
IN
OUT
IN
IN
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
IN
IN
IN
IN
IN
Key status
OUT
IN
Keyless indicator light on request
IN
OUT
Keyless warning buzzer operation request
IN
OUT
Keyless warning light on request
IN
OUT
Laser sensor-related information
IN
OUT
Lock/unlock condition
OUT
IN
Manual air conditioner operation request
IN
OUT
IN
Manual shift control
IN
OUT
IN
OUT
Neutral switch
OUT
IN
IN
IN
Oil pressure warning light on request
OUT
IN
PAD indicator on request
IN
OUT
Parking brake status
IN
IN
IN
IN
OUT
IN
Passenger-side buckle switch status
IN
OUT
Power supply status
IN
IN
IN
OUT
IN
IN
OUT
Priority recirculate request
OUT
IN
IN
Push button system-related information
IN
OUT
Rear body control module (RBCM) customize request
IN
OUT
Rear fog indicator light information
IN
OUT
Rear fog light information
OUT
IN
IN
Rear washer switch information
IN
OUT
Rear window defroster information
IN
OUT
IN
Rear wiper information
OUT
IN
IN
Rear wiper status
IN
IN
OUT
ROOM fuse status
IN
IN
IN
IN
OUT
Seat warmer cut status
OUT
IN
Security indicator buzzer sound request
IN
OUT
Security indicator on request
IN
OUT
Selector lever position
IN
OUT
IN
IN
IN
IN
IN
IN
OUT
IN
IN
OUT
IN
OUT
IN
IN
Shift indicator light
OUT
IN
Shift range position
OUT
IN
IN
Start stop unit customize request
IN
OUT
OUT
IN
Starter relay status
OUT
IN
Steering angle (absolute angle) signal
IN
OUT
Steering angle (relative angle) signal
IN
OUT
IN
IN
Steering angle (estimated absolute angle) signal
IN
IN
IN
IN
IN
OUT
IN
IN
IN
IN
IN
IN
IN
OUT
IN
IN
IN
IN
IN
IN
IN
OUT
IN
IN
IN
IN
IN
IN
OUT
Steering angle condition
OUT
IN
IN
IN
OUT
IN
OUT
IN
OUT
IN
IN
OUT
Steering lock system-related information
IN
OUT
Steering shift switch
IN
OUT
Steering switch information
IN
IN
IN
OUT
IN
IN
OUT
IN
OUT
Target gear position
IN
OUT
IN
IN
Theft-deterrent system alarm-related information
IN
OUT
Theft-deterrent system status
OUT
IN
Tire size
IN
IN
IN
OUT
TNS status
OUT
IN
IN
TPMS OFF switch status
IN
OUT
Traveled distance
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
IN
Turn indicator light on request
OUT
IN
IN
Vehicle speed
IN
IN
OUT
IN
IN
IN
IN
OUT
IN
IN
IN
IN
OUT
IN
IN
IN
OUT
IN
OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
Washer level sensor status
OUT
IN
Wheel speed (LF, RF, LR, RR)
IN
IN
IN
OUT
IN
IN
IN
IN
IN
Windshield washer switch information
IN
IN
IN
OUT
Windshield wiper (INT) status
IN
OUT
Windshield wiper operation status
IN
OUT
IN
IN
Windshield wiper status
OUT
IN
IN
IN
OUT
Windshield wiper switch information
IN
IN
IN
OUT
Yaw rate
IN
IN
IN
OUT
IN
IN
IN
IN
OUT
IN
4WD system status
OUT
IN
OUT
IN

*1  :ATX
*2  :With AFS system
*3  :4WD
*4  :With smart city brake support
*5  :With hi-beam control (HBC) system
*6  :SKYACTIV-D 2.2
*7  :With position memory system


MS-CAN communication table

OUT: Output (sends signal)
IN: Input (receives signal)

Signal

CAN system related module

Rear body control module (RBCM)

BSM control module (LH)*1

BSM control module (RH)*1

Climate control unit*2

Clock*3

Audio

Instrument cluster

Rear vehicle monitoring control module*4

Rear mount camera*5

Parking sensor control module*6

A/C
OUT
IN
Alarm status
OUT
IN
Answer-back-related information
OUT
IN
Audio configuration information
IN
OUT
Back-up light on request signal
IN
IN
IN
OUT
IN
IN
IN
Blower speed
OUT
IN
Brake light status
IN
OUT
BSM control module (LH) status
OUT
IN
BSM control module (RH) status
IN
OUT
BSM control module configuration information
IN
IN
OUT
BSM system (LH) buzzer on request
OUT
IN
BSM system (LH) indicator off request
OUT
IN
BSM system (RH) buzzer on request
IN
OUT
BSM system (RH) indicator off request
IN
OUT
BSM system buzzer on request
IN
OUT
IN
BSM system customize-related information
IN
IN
OUT
IN
OUT
IN
BSM system indicator off request
IN
OUT
IN
BSM system main switch status
IN
OUT
Climate control unit configuration information
IN
OUT
Cranking start status
IN
OUT
Customize information
OUT
IN
IN
OUT
Defroster
OUT
IN
Dimmer cancel
IN
IN
IN
OUT
IN
Driver's seat belt status
IN
OUT
Engine status (with i-stop)
IN
OUT
Engine stop request
OUT
IN
Engine-off time
IN
IN
OUT
IN
Fuel cut request
IN
IN
OUT
Fuel-level sensor-related information
OUT
IN
Gear position
IN
OUT
IN
IN
OUT
IN
Gear position/selector lever position
OUT
IN
IN
Hazard warning switch status
IN
OUT
Headlight status
OUT
IN
IN
High beam control system customize information
OUT
IN
IN
OUT
Ignition key status
IN
IN
OUT
Ignition switch status
IN
OUT
IN
OUT
IN
IN
IN
IN
IN
OUT
IN
Light switch status
IN
IN
OUT
Neutral switch status
OUT
IN
PAD indicator on status
OUT
OUT
IN
Panel light level
IN
IN
OUT
Parking assist control signal
IN
OUT
Parking brake status
IN
OUT
IN
IN
Parking sensor system status
IN
IN
OUT
Passing switch status
OUT
IN
PTC heater operation request
OUT
IN
Rear body control module (RBCM) customize-related information
IN
OUT
OUT
IN
OUT
IN
IN
OUT
IN
Rear fog indicator light on request
OUT
IN
Rear fog light status
IN
OUT
Rear vehicle monitoring control module configuration information
OUT
IN
Rear vehicle monitoring status
IN
OUT
Rear vehicle monitoring system buzzer on request
IN
OUT
Rear window defroster operation request
OUT
IN
Rear window defroster status
IN
OUT
Rear wiper low speed status
IN
OUT
ROOM fuse status
IN
OUT
IN
OUT
IN
IN
Seat belt status
OUT
IN
Seat belt warning status (passenger's seat, rear)
IN
IN
OUT
Seat warmer cut status
IN
IN
OUT
Security indicator light on request
OUT
IN
Steering angle (relative angle) signal
OUT
IN
Steering angle (estimated absolute angle) signal
IN
IN
OUT
IN
Temperature control dial status
OUT
IN
Theft-deterrent system alarm-related information
OUT
IN
Theft-deterrent system status
OUT
IN
Traveled distance
IN
IN
OUT
Turn switch status
IN
IN
OUT
IN
IN
Warning buzzer request signal
IN
OUT
Wheel speed
OUT
IN
Windshield washer switch status
OUT
IN
Windshield wiper operation status
IN
OUT

*1  :With BSM system
*2  :With full-auto air conditioner
*3  :With manual air conditioner
*4  :With rear vehicle monitoring system
*5  :With rear mount camera
*6  :With parking sensor system


Construction

•  The HS-CAN has terminator resistors built into the following units which form the CAN lines.
―  Between PCM terminal 2AK (CAN_H)—2AL terminal (CAN_L), resistance value: 124 ohms
―  Between instrument cluster terminal B (CAN_H)—Terminal D (CAN_L), resistance value:120 ohms
•  The MS-CAN has terminal resistors built into the following units which form the CAN lines.
―  Rear body control module (RBCM) terminal 4G (CAN_H)—Terminal 4J (CAN_L), resistance value: 120 ohms
―  instrument cluster terminal C (CAN_H)—Terminal E (CAN_L), resistance value: 120 ohms