MULTIPLEX COMMUNICATION SYSTEM

id100000001400

Outline

• A controller area network (CAN) system has been adopted in which multiplex communication is performed using a single communication path.

• For individual communication between the control modules, a local CAN, ISO communication, and LIN communication have been adopted in consideration of the required communication speed and cost.

System Wiring Diagram

CAN/LIN communication/ISO communication/local CAN

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Local CAN

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Structural view

L.H.D.

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L.H.D.

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R.H.D.

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R.H.D.

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Function

CAN (controller area network) system

• HS-CAN (high-speed controller area network) is used for communication between the following modules:

― PCM

― ABS HU/CM (With ABS)

― DSC HU/CM (With DSC)

― Front body control module (FBCM)

― TCM (ATX)

― DC-DC converter (i-ELOOP) (With i-ELOOP system)

― AFS control module (with AFS)

― Laser sensor (with smart city brake support)

― Forward sensing camera (FSC) (with forward sensing camera)

― Start stop unit

― EPS control module

― SAS control module

― Connectivity master unit (with center display)

― Audio amplifier (with Bose^®)

― Vehicle control module (V/C-module)

― Instrument cluster

• MS-CAN (mid-speed controller area network) is used for communication between the following modules:

― Instrument cluster

― Parking sensor control module (with parking sensor system)

― Climate control unit (full-auto air conditioner)

― Rear vehicle monitoring control module (LH) (with rear vehicle monitoring system)

― BSM control module (LH) (with BSM system)

― Rear body control module (RBCM)

• 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
Signal	PCM	TCM	AFS control module	Laser sensor	ABS HU/CM (With ABS), DSC HU/CM (With DSC)	EPS control module	Front body control module (FBCM)	Forward sensing camera (FSC)	Instrument cluster	Start stop unit	Vehicle control module (V/C-module)	SAS control module	DC-DC converter (i-ELOOP)	Connectivity master unit	Audio amplifier
Accelerator pedal opening angle	OUT	–	–	–	IN	–	–	IN	IN	–	IN	IN	–	IN	IN
Accelerator pedal opening angle	OUT	–	–	–	IN	–	–	IN	IN	–	IN	IN	–	IN	–
Accelerator pedal position	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–	–
Acceleration signal status	–	–	–	–	IN	–	–	–	–	–	–	OUT	–	–	–
A/C operation signal	IN	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
AFS system warning light status	–	–	OUT	–	–	–	–	–	IN	–	–	–	–	IN	–
AFS (adaptive front lighting system) level configuration	–	–	OUT	–	–	–	–	–	IN	–	–	–	–	IN	–
AFS OFF switch status	–	–	IN	–	–	–	–	–	OUT	–	–	–	–	–	–
Air bag system warning light on request	–	–	–	–	–	–	–	–	IN	–	–	OUT	–	IN	–
	–	–	–	–	–	–	–	–	OUT	–	–	IN	–	–	–
	–	–	–	IN	IN	–	IN	–	OUT	IN	IN	–	–	IN	–
Air bag system warning buzzer on request	–	–	–	–	–	–	–	–	IN	–	–	OUT	–	IN	–
Air bag system-related information	–	–	–	–	–	–	–	–	IN	–	–	OUT	–	IN	–
Air conditioner signal	OUT	–	–	–	–	–	IN	–	IN	–	–	–	–	–	–
Ambient temperature	IN^*1	IN	IN	IN	IN	IN	IN	–	OUT	–	IN	IN	–	IN	–
	OUT	–	–	–	IN	–	–	–	–	–	–	–	–	IN	–
	OUT	–	IN	IN	–	IN	–	IN	–	–	–	–	–	IN	–
Answer-back-related information	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
AT shift position	IN	OUT^*1	–	–	–	–	–	–	–	–	–	–	–	–	–
ATX gear position	IN	OUT^*1	–	–	IN	–	IN	IN	IN	IN	IN	–	–	IN	–
	OUT^*3	–	–	–	IN	–	IN	IN	IN	IN	IN	–	–	IN	–
	IN	OUT^*1	–	–	–	–	–	–	IN	–	IN	–	–	IN	–
	OUT^*3	–	–	–	–	–	–	–	IN	–	IN	–	–	IN	–
	IN	OUT^*1	–	–	–	–	–	–	IN	–	–	–	–	IN	–
	OUT^*3	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Audio configuration information	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Back-up light on request	–	–	IN	IN	IN	–	–	–	OUT	–	–	–	–	IN	–
Back-up light switch	OUT	–	–	–	IN	–	–	IN	IN	–	IN	–	–	IN	–
Battery charge status	IN^*1	–	IN	IN	IN	IN	IN	–	OUT	IN	IN	IN	–	IN	–
Battery regeneration status	OUT^*1	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Blower motor relay status	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	–	–
Blower relay on request	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
Blower speed	IN	–	–	–	–	–	OUT	–	–	–	–	–	–	IN	–
Brake fluid level	–	–	–	–	–	–	OUT	–	IN	–	IN	–	–	IN	–
Brake light status	–	–	–	–	IN	–	–	–	OUT	–	IN	–	–	IN	–
Brake pedal depressed status	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–	–
Brake status	–	–	–	–	OUT	–	–	–	–	–	IN	–	–	–	–
Brake switch (No.1 signal)	OUT	IN	–	–	IN	–	IN	IN	IN	–	–	–	–	IN	–
Brake switch (No.2 signal)	OUT	IN	–	–	–	–	–	IN	IN	IN	IN	IN	–	IN	–
Brake switch (No.2 signal)	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	–	–
Brake switch malfunction determination	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Brake switch status	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–	–
BSM system personalization-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
BSM system personalization-related information	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Clutch pedal stroke sensor	OUT	–	–	–	IN	–	–	–	–	–	–	–	–	–	–
Clutch status	OUT^*1	–	–	–	–	–	–	–	–	–	–	–	–	IN	–
Cluster switch status	–	–	IN	–	–	–	–	IN	OUT	–	IN	–	–	–	–
Combiner current position signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Combiner target angle signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Combiner autodimming level signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Combiner dimming switch signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Combiner manual-dimming level signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Collision detection (front, side, roll over)	IN	–	–	–	IN	–	IN	–	–	–	–	OUT	–	IN	–
Collision detection (rear)	IN	–	–	–	IN	–	IN	–	–	–	–	OUT	–	IN	–
Cranking start	IN	–	–	–	–	–	IN	–	IN	OUT	–	–	–	–	–
Cranking time	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	IN	–
Cruise control control status	OUT^*1	–	–	–	IN	–	–	–	–	–	IN	–	–	–	–
Cruise control set speed	OUT^*1	–	–	–	IN	–	–	–	–	–	IN	–	–	–	–
Cruise control switch	OUT^*1	–	–	–	IN	–	–	–	–	–	IN	–	–	–	–
Cruise control switch signal	IN	–	–	–	IN	–	–	–	–	OUT	IN	–	–	–	–
	IN	–	–	–	–	–	–	–	–	OUT	IN	–	–	–	–
	OUT	–	–	–	–	–	–	–	IN	IN	–	–	–	IN	–
Cruise control system-related information	IN^*1	–	–	–	IN	–	–	–	–	–	OUT	–	–	IN	–
	–	–	–	–	–	–	–	–	IN	–	OUT	–	–	IN	–
	IN^*1	–	–	OUT	–	–	–	–	–	–	–	–	–	IN	–
	IN^*1	–	–	–	OUT	–	–	–	–	–	IN	–	–	–	–
	–	–	–	–	OUT	–	–	–	–	–	IN	–	–	–	–
	OUT^*1	–	–	–	IN	–	–	–	–	–	IN	–	–	–	–
	–	–	–	OUT	–	–	–	–	IN	–	–	–	–	IN	–
	–	–	–	OUT	–	–	–	–	IN	–	–	–	–	–	–
	–	–	–	OUT	IN	–	–	–	IN	–	IN	–	–	IN	–
	–	–	–	OUT	IN	–	–	–	IN	–	–	–	–	–	–
	–	–	–	OUT	–	–	–	–	IN	–	IN	–	–	IN	–
DC-DC converter condition	IN^*1	–	–	–	–	–	OUT	–	–	–	–	–	–	–	–
Diesel particulate filter warning light	OUT^*2	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Dimmer cancel	–	–	–	–	–	–	–	–	OUT	IN	–	–	–	IN	–
Distance unit switch signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Door status	IN^*1	–	–	–	–	–	–	–	OUT	IN	–	–	–	IN	–
	IN^*1	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	IN
	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	IN
	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Driving condition	IN^*1	–	IN	IN	IN	IN	IN	–	OUT	IN	IN	IN	–	IN	–
Driver-side buckle switch status	IN^*1	–	–	–	–	–	–	–	IN	IN	–	OUT	–	IN	–
DSC OFF switch status	IN^*3	–	–	–	IN	–	–	–	OUT	–	–	–	–	–	–
ABS system-related information (With ABS), DSC system-related information (With DSC)	OUT	–	–	–	IN	–	–	–	–	–	–	–	–	–	–
	IN	–	–	–	OUT	–	–	–	–	–	–	–	–	–	–
	IN	IN	–	–	OUT	IN	IN	IN	–	–	IN	IN	–	IN	–
	–	–	–	–	OUT	–	–	–	–	–	–	–	–	IN	–
	IN	IN	–	–	OUT	IN	–	IN	–	–	IN	IN	–	IN	–
	IN	IN	–	–	OUT	IN	–	IN	–	–	IN	–	–	IN	–
	IN	IN	–	–	OUT	–	–	IN	–	–	IN	–	–	IN	–
	IN	IN	–	–	OUT	–	–	–	–	–	–	–	–	IN	–
	IN	–	–	–	OUT	–	–	–	–	–	IN	–	–	IN	–
	IN	IN	–	–	OUT	–	IN	–	–	–	IN	–	–	IN	–
	–	IN	–	–	OUT	–	–	–	IN	–	IN	–	–	IN	–
	–	–	–	–	OUT	–	–	–	IN	–	IN	–	–	IN	–
	–	–	–	–	OUT	–	–	–	IN	–	–	–	–	IN	–
	IN^*3	IN	–	–	OUT	–	–	–	–	–	IN	–	–	–	–
	–	–	–	–	OUT	–	–	–	IN	–	–	–	–	IN	–
	–	–	–	–	OUT	–	IN	–	–	–	–	–	–	IN	–
Electric AT oil pump-related signal (i-stop)	IN	OUT^*1	–	–	–	–	–	–	–	–	–	–	–	–	–
Engine coolant temperature	OUT	–	–	–	–	–	IN	–	IN	–	–	–	–	IN	–
Engine displacement	OUT	IN	–	–	IN	IN	IN	–	IN	–	IN	–	–	IN	IN
Engine displacement	OUT	–	–	–	IN	–	–	–	IN	–	–	–	–	–	IN
Engine off time	IN	–	–	–	–	–	–	–	–	OUT	–	–	–	–	–
Engine off time	IN	IN	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Engine Status	OUT	IN	–	–	–	–	–	–	IN	–	–	–	–	IN	–
	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	–	–
	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–	–
	OUT	–	–	IN	–	–	–	–	IN	–	–	–	–	IN	–
	OUT	–	–	IN	–	–	–	–	IN	–	–	–	–	–	–
	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	IN	–
	–	–	–	–	OUT	–	–	–	–	–	IN	–	–	–	–
Engine speed	OUT	–	–	–	IN	IN	IN	IN	IN	IN	IN	IN	–	IN	IN
Engine speed	OUT^*1	IN	–	–	–	–	–	–	–	–	–	–	–	–	–
Engine status at idle	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	–	–
Engine stop request	IN^*1	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Engine torque	OUT	–	–	–	–	–	IN	–	–	–	–	–	–	–	–
Engine torque	OUT	–	–	–	IN	–	–	–	–	–	–	–	–	–	–
EPS status	IN^*1	–	–	–	–	OUT	–	–	–	–	–	–	–	IN	–
	–	–	–	–	–	OUT	–	–	IN	–	–	–	–	IN	–
	–	–	–	–	–	OUT	–	–	–	–	–	–	–	IN	–
Forward sensing camera (FSC) personalization-related information	–	–	–	–	–	–	–	OUT	–	–	IN	–	–	–	–
	–	–	–	–	–	–	–	–	–	OUT	–	–	–	IN	–
	–	–	–	–	–	–	–	IN	–	–	–	–	–	OUT	–
	–	–	–	–	–	–	–	OUT	–	–	–	–	–	IN	–
	–	–	–	–	–	–	–	–	–	–	OUT	–	–	IN	–
Front combination light on request	–	–	–	–	–	–	IN	OUT	–	–	IN	–	–	–	–
Front fog light information	–	–	–	–	–	–	OUT	IN	IN	–	–	–	–	IN	–
Fuel cap warning light on request	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Fuel cut request	IN	–	–	–	–	–	IN	–	IN	–	–	OUT	–	IN	–
Fuel cut request	IN	–	–	–	IN	–	–	–	–	–	–	OUT	–	–	–
Fuel economy information reset request signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Fuel injection amount	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Fuel tank level	IN	–	–	–	–	–	–	–	OUT^*2	–	–	–	–	IN	–
Fuel tank level	IN	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Gear position	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Gear position	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	–	–
Global central configuration	IN	IN	IN	IN	IN	IN	–	–	OUT	IN	IN	–	–	IN	IN
Global central configuration error	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Hands-free telephone system-related information	–	IN	–	–	IN	–	–	–	OUT	IN	IN	–	–	IN	–
Hazard warning switch information	–	–	–	–	–	–	IN	IN	IN	OUT	IN	–	–	–	–
Headlight information	IN^*1	–	IN	–	–	–	OUT	IN	IN	–	IN	–	–	IN	–
Headlight warning request signal	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	IN	–
Headlight status	–	–	–	–	–	–	OUT	IN	–	–	–	–	–	IN	–
High-beam indicator	–	–	–	–	–	–	OUT	IN	IN	–	–	–	–	IN	–
High-beam control personalization-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Horn control	–	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Hood status	IN^*1	–	–	–	–	–	–	–	OUT	IN	–	–	IN	IN	–
i-ELOOP-related information	IN^*1	IN	–	–	–	–	–	–	–	–	–	–	OUT	IN	–
	IN^*1	–	–	–	–	–	–	–	–	–	–	–	OUT	–	–
	OUT^*1	IN	–	–	–	–	–	–	–	–	–	–	IN	IN	–
	OUT^*1	IN	–	–	–	–	–	–	IN	–	–	–	IN	IN	–
	IN^*1	–	–	–	–	–	–	–	–	–	–	–	OUT	–	–
Ignition key status	IN^*1	–	IN	IN	IN	IN	IN	–	OUT	IN	IN	IN	–	IN	–
Ignition off timer	IN^*1	IN	IN	IN	IN	IN	IN	–	OUT	IN	IN	IN	–	IN	–
Ignition switch status	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	IN	–
Ignition switch status	–	–	IN	–	–	IN	IN	IN	OUT	–	IN	–	–	IN	IN
Immobilizer system related information	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	–	–
Immobilizer system related information	IN	–	–	–	–	–	–	–	–	OUT	–	–	–	–	–
Instrument cluster personalization-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Instrument cluster personalization-related information	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
i-stop OFF switch status	IN	–	–	–	–	–	–	–	OUT^*1	–	–	–	–	–	–
i-stop related information	IN^*1	–	–	–	–	–	–	–	–	OUT	–	–	–	–	–
	IN^*1	–	–	–	OUT	–	–	–	–	–	–	–	–	–	–
	OUT^*1	IN	–	–	–	–	–	–	IN	–	–	–	–	IN	–
	OUT^*1	IN	–	–	–	–	–	–	IN	IN	–	–	–	IN	–
	OUT^*1	–	–	–	IN	–	–	–	–	–	–	–	–	IN	–
	OUT^*1	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
	OUT^*1	–	–	–	–	–	–	–	–	–	–	–	–	IN	–
	OUT^*1	–	–	–	–	–	–	–	–	IN	–	–	–	IN	–
	OUT^*1	–	–	–	–	–	IN	–	–	–	–	–	–	IN	–
	OUT	IN	–	–	IN	IN	IN	–	IN	IN	IN	–	–	IN	–
	OUT^*2	–	–	–	–	–	–	–	–	–	–	–	–	IN	–
Keyless warning buzzer operation request	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
Keyless warning light on request	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
Key status	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	IN	–
Laser sensor-related information	IN^*1	–	–	OUT	–	–	–	–	–	–	IN	–	–	IN	–
Laser sensor-related information	IN^*1	–	–	OUT	–	–	–	–	–	–	–	–	–	IN	–
Lane departure warning system (LDWS) warning indication request signal^*4	–	–	–	–	–	–	–	OUT	–	–	IN	–	–	–	–
	–	–	–	–	–	–	–	–	IN	–	OUT	–	–	–	–
Lane departure warning system (LDWS) warning indication request signal^*5	–	–	–	–	–	–	–	OUT	IN	–	–	–	–	–	–
Lane departure warning system (LDWS) warning sound request signal^*4	–	–	–	–	–	–	–	OUT	–	–	IN	–	–	–	–
	–	–	–	–	–	–	–	–	IN	–	OUT	–	–	IN	–
Lane departure warning system (LDWS) warning sound request signal^*5	–	–	–	–	–	–	–	OUT	IN	–	–	–	–	IN	–
Maintenance monitor-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Manual air conditioner operation request	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	–	–
Manual shift control	IN^*3	IN	–	–	–	–	–	–	OUT	–	–	–	–	–	–
	IN	–	–	–	–	–	–	–	OUT	–	IN	–	–	IN	–
	IN	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–
	OUT^*3	–	–	–	IN	–	–	–	–	–	–	–	–	–	–
Master warning light on request signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
MIL on request	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Neutral switch	OUT	–	–	–	–	–	–	–	IN	IN	IN	–	–	IN	–
Neutral switch	OUT^*1	IN	–	–	–	–	–	–	–	–	–	–	–	IN	–
Oil level warning	OUT^*2	–	–	–	–	–	–	–	IN	–	–	–	–	–	–
Oil pressure warning light on request	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
PAD indicator on status	–	–	–	–	–	–	–	–	OUT	–	–	IN	–	–	–
PAD indicator on request	–	–	–	–	–	–	–	–	IN	–	–	OUT	–	IN	–
Panel light level	–	–	–	–	–	–	–	–	OUT	IN	–	–	–	IN	–
Parking brake status	IN	–	–	–	IN	–	IN	–	OUT	–	IN	–	–	IN	–
Parking sensor system status	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Parking sensor system personalization-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Parking sensor system personalization-related information	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Passenger-side buckle switch status	–	–	–	–	–	–	–	–	IN	–	–	OUT	–	IN	–
Power consumption	IN^*1	–	–	–	–	OUT	–	–	–	–	–	–	–	IN	–
Power supply status	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
	IN	–	–	–	–	–	IN	–	IN	OUT	–	–	–	–	–
	IN	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Push button system-related information	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
PTC heater operation request	IN^*2	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
RBCM personalization-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	IN	–
Rear fog light information	–	–	–	–	–	–	OUT	IN	IN	–	–	–	–	IN	–
Rear fog indicator light information	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	IN	–
Rear washer switch information	–	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Rear window defroster information	IN^*1	–	–	–	–	–	OUT	–	IN	–	–	–	–	IN	–
Rear window defroster operation request	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
Rear wiper information	–	–	–	–	–	–	OUT	IN	IN	–	–	–	–	IN	–
Rear wiper status	–	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Rolling counter	–	–	–	–	IN	–	–	–	–	–	–	OUT	–	–	–
ROOM fuse status	–	IN	–	–	–	–	–	IN	OUT	–	IN	–	IN	–	–
ROOM fuse status	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Seat belt status	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Seat warmer cut status	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	–	–
Security indicator on request	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
Security indicator light on request	–	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Shift range position	–	OUT^*1	–	–	IN	–	–	–	IN	–	IN	–	–	IN	–
	OUT	–	–	–	–	–	–	–	IN	–	IN	–	–	–	IN
	OUT^*3	–	–	–	IN	–	–	–	IN	–	IN	–	–	IN	–
Smart City Brake Support (SCBS)-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
	–	–	–	OUT	IN	–	–	–	IN	–	IN	–	–	IN	–
	–	–	–	IN	OUT	–	–	–	IN	–	IN	–	–	IN	–
	–	–	–	OUT	IN	–	–	–	IN	–	–	–	–	–	–
	–	–	–	OUT	IN	–	–	–	–	–	–	–	–	–	–
	–	–	–	IN	OUT	–	–	–	IN	–	–	–	–	IN	–
	–	–	–	IN	OUT	–	–	–	–	–	–	–	–	–	–
	–	–	–	IN	OUT	–	–	–	IN	–	–	–	–	–	–
Smart brake support (SBS) related information	IN^*1	–	–	–	IN	–	–	–	–	–	OUT	–	–	IN	–
Start stop unit customize status	–	–	–	–	–	–	–	–	–	OUT	–	–	–	IN	–
Start stop unit personalization-related information	–	–	–	–	–	–	–	–	–	IN	–	–	–	OUT	–
	–	–	–	–	–	–	–	–	–	OUT	–	–	–	IN	–
	–	–	–	–	–	–	–	IN	–	–	–	–	–	OUT	–
	–	–	–	–	–	–	–	OUT	–	–	–	–	–	IN	–
	–	–	–	–	–	–	–	–	–	–	OUT	–	–	IN	–
Starter relay status	OUT	–	–	–	–	–	–	–	–	IN	–	–	–	–	–
Steering angle (absolute steering angle) signal	–	–	–	–	–	IN	–	–	–	OUT	–	–	–	–	–
Steering angle (relative steering angle) signal	–	–	–	–	IN	OUT	–	IN	IN	–	IN	–	–	–	–
Steering angle (estimated absolute steering angle) signal	IN	IN	IN	IN	–	OUT	–	IN	IN	IN	IN	–	–	IN	–
Steering angle (estimated absolute steering angle) signal	IN	IN	IN	IN	–	OUT	–	IN	IN	IN	IN	–	IN	–	–
Steering angle condition	IN^*1	–	–	IN	–	OUT	–	–	–	–	–	–	–	IN	–
	IN^*1	–	–	–	–	OUT	–	–	–	–	–	–	–	–	–
	–	IN	–	–	–	–	–	–	OUT	–	IN	–	–	IN	IN
Steering lock system-related information	–	–	–	–	–	–	–	–	IN	OUT	–	–	–	IN	–
Steering shift switch	–	IN	–	–	–	–	–	–	–	OUT	–	–	–	–	–
Steering switch information	–	–	–	–	–	–	IN	IN	IN	OUT	IN	–	–	–	–
	–	–	–	–	–	–	IN	IN	IN	OUT	–	–	–	–	–
	–	–	–	–	–	–	IN	IN	–	OUT	IN	–	–	–	–
	–	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Supply power status	OUT^*1	–	–	IN	–	–	–	–	–	–	–	–	–	–	–
Target gear position	IN	OUT^*1	–	–	IN	–	–	–	IN	–	–	–	–	IN	IN
Target gear position	OUT^*3	–	–	–	IN	–	–	–	IN	–	–	–	–	IN	IN
TAU communication status signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Temperature control dial status	IN	–	–	–	–	–	–	–	OUT	–	–	–	–	IN	–
Temperature unit switch signal	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Theft-deterrent system status	–	–	–	–	–	–	–	–	OUT	IN	–	–	–	IN	–
Theft-deterrent system alarm-related information	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
Tire size	IN	IN	–	–	IN	–	–	–	OUT	–	IN	–	–	IN	–
TNS status	–	–	–	–	–	–	OUT	–	IN	IN	–	–	–	IN	–
TPMS OFF switch status	–	–	–	–	IN	–	–	–	OUT	–	–	–	–	–	–
Transmission type	OUT	IN	–	–	–	–	IN	–	IN	IN	–	–	–	–	–
Traveled distance	OUT	–	–	–	–	–	–	–	IN	–	–	–	–	IN	–
Traveled distance	IN	IN	IN	IN	IN	IN	IN	–	OUT	IN	IN	IN	–	IN	–
Turn indicator light on request	–	–	–	–	–	–	OUT	IN	IN	–	IN	–	–	IN	–
Vehicle speed	IN^*1	–	–	IN	OUT	IN	–	IN	IN	–	IN	–	–	–	–
	IN^*1	–	–	–	OUT	IN	–	IN	–	–	IN	–	–	–	–
	IN^*1	–	–	IN	OUT	–	–	IN	–	–	IN	–	–	–	–
	IN	–	–	IN	OUT	–	–	–	–	IN	–	–	–	–	–
	OUT	–	IN	–	IN	IN	IN	IN	IN	IN	IN	IN	–	IN	–
	OUT	–	IN	–	IN	IN	IN	IN	IN	IN	IN	IN	–	IN	IN
	OUT	–	–	–	IN	–	–	–	IN	–	IN	–	–	–	–
Warning guidance-related information	–	–	–	–	–	–	–	–	IN	–	–	–	–	OUT	–
Washer level sensor status	–	–	–	–	–	–	OUT	–	IN	–	–	–	–	IN	–
Wheel speed (LF, RF, LR, RR)	IN	IN	–	–	OUT	IN	IN	IN	IN	IN	IN	–	–	IN	–
Wheel speed (LF, RF, LR, RR)	IN^*3	–	–	IN	OUT	–	–	IN	IN	–	–	–	–	–	–
Windshield wiper (INT) status	–	–	–	–	–	–	IN	–	–	OUT	–	–	–	–	–
Windshield window defroster operation request	–	–	–	–	–	–	IN	–	OUT	–	–	–	–	–	–
Windshield wiper status	IN^*1	–	–	–	–	–	OUT	IN	IN	–	IN	–	–	IN	–
	–	–	–	–	–	–	OUT	IN	–	–	–	–	–	IN	–
	–	–	–	–	–	–	IN	–	–	OUT	IN	–	–	–	–
Windshield wiper switch information	–	–	–	IN	–	–	IN	–	–	OUT	IN	–	–	–	–
Windshield washer switch information	–	–	–	IN	–	–	IN	–	IN	OUT	–	–	–	–	–
Yaw rate	–	–	–	–	IN	–	–	–	–	–	–	OUT	–	–	–
	IN	IN	–	IN	OUT	–	IN	IN	IN	–	IN	–	–	IN	–
	IN^*1	IN	–	IN	OUT	IN	–	IN	IN	–	IN	–	–	IN	–
	IN^*1	IN	–	IN	OUT	IN	–	IN	–	–	IN	–	–	IN	–
	IN^*1	IN	–	–	OUT	–	–	IN	–	–	IN	–	–	–	–

*1 :SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 1.5, SKYACTIV-D 2.2

*2 :SKYACTIV-D 1.5, SKYACTIV-D 2.2

*3 :MZR 1.6

*4 :With Mazda Radar Cruise Control (MRCC)

*5 :WIthout Mazda Radar Cruise Control (MRCC)

MS-CAN communication table

OUT: Output (sends signal)

IN: Input (receives signal)

Signal	CAN system related module
Signal	Rear body control module (RBCM)	Climate control unit	Instrument cluster	Rear vehicle control module (LH)	BSM control module (LH)	Parking sensor control module
Air bag system warning light on request	IN	IN	OUT	–	–	–
Air conditioner signal	–	IN	OUT	–	–	–
A/C operation signal	–	OUT	IN	–	–	–
Alarm status	OUT	–	IN	–	–	–
Ambient temperature	IN	IN	OUT	–	–	–
Ambient temperature	–	IN	OUT	–	–	–
Answer-back-related information	OUT	–	IN	–	–	–
Back-up light on request	IN	–	OUT	IN	IN	IN
Battery charge status	IN	IN	OUT	–	–	–
Blower motor relay status	–	IN	OUT	–	–	–
Blower speed	–	OUT	IN	–	–	–
BSM control module configuration information	–	–	OUT	–	IN	–
BSM system indicator off request	–	–	IN	–	OUT	–
BSM system-related information	–	–	IN	–	OUT	–
Brake light status	IN	–	OUT	–	–	–
Brake light status	OUT	–	IN	–	–	–
Cluster switch status	–	–	OUT	IN	IN	–
Cranking start status	–	IN	OUT	–	–	–
Dimmer cancel	–	IN	OUT	IN	IN	–
Door status	OUT	–	IN	–	–	–
Drive information system data	–	IN	OUT	–	–	–
Driver's seat belt status	IN	–	OUT	–	–	–
Engine coolant temperature	–	IN	OUT	–	–	–
Engine exhaust volume	–	IN	OUT	–	–	–
Engine-off status	IN	IN	OUT	–	–	–
Engine speed	IN	IN	OUT	–	–	–
Engine status (i-stop)	–	IN	OUT	–	–	–
Engine stop request	–	OUT	IN	–	–	–
Fuel cut request	IN	–	OUT	–	–	–
Fuel-level sensor-related information	OUT	–	IN	–	–	–
Gear position	IN	–	OUT	IN	–	IN
Gear position	–	–	OUT	IN	–	–
Global central configuration	IN	IN	OUT	–	IN	IN
Hands-free telephone system related information	–	IN	OUT	IN	IN	–
Hazard warning switch information	IN	–	OUT	–	–	–
Heater control unit configuration information	–	IN	OUT	–	–	–
Head light on request	–	–	OUT	–	–	IN
High-beam control personalization-related information	IN	–	OUT	–	–	–
High-beam control personalization-related information	–	–	OUT	IN	–	–
Ignition key status	IN	IN	OUT	–	–	–
Ignition off timer	IN	IN	OUT	–	–	–
Ignition switch status	IN	–	OUT	–	–	–
Ignition switch status	IN	IN	OUT	–	IN	–
Keyless indicator light on request	OUT	–	IN	–	–	–
MTX gear position	–	–	OUT	–	–	IN
Neutral switch status	–	–	OUT	–	–	IN
Panel light level	–	IN	OUT	–	–	–
Parking brake status	IN	–	OUT	–	–	IN
Parking sensor system status	–	–	IN	–	–	OUT
Parking sensor personalization-related information	–	–	IN	–	–	OUT
Parking sensor personalization-related information	–	–	OUT	–	–	IN
PTC heater operation request	–	OUT	IN	–	–	–
RBCM personalization-related information	IN	–	OUT	–	–	–
RBCM personalization-related information	OUT	–	IN	–	–	–
Rear fog light illumination request signal	IN	–	OUT	–	–	–
Rear vehicle monitoring control module configuration information	–	–	OUT	IN	–	–
Rear vehicle monitoring status	–	–	IN	OUT	–	–
Rear vehicle monitoring / BSM switch information	–	–	OUT	IN	IN	–
Rear vehicle monitoring / BSM system-related information	–	–	OUT	IN	IN	–
Rear window defroster information	–	IN	OUT	–	–	–
Rear window defroster operation request	–	OUT	IN	–	–	–
Rear wiper information	IN	–	OUT	–	–	–
Rear fog Indicator light status	OUT	–	IN	–	–	–
Running status	IN	IN	OUT	–	–	–
ROOM fuse status	–	IN	OUT	–	–	–
ROOM fuse status	OUT	–	IN	–	–	–
Seat belt status	OUT	–	IN	–	–	–
Smart city brake support (SCBS) related information	IN	–	OUT	–	–	–
Start stop unit personalization-related information	OUT	–	IN	–	–	–
Supply voltage	IN	IN	OUT	–	–	–
Temperature control dial status	–	OUT	IN	–	–	–
Theft-deterrent system alarm-related information	OUT	–	IN	–	–	–
Traveled distance	IN	IN	OUT	–	–	–
Turn switch signal	–	–	OUT	IN	IN	–
Vehicle speed	–	–	OUT	IN	–	–
Vehicle speed	IN	IN	OUT	IN	IN	IN
windshield wiper status	–	IN	OUT	–	–	–
Windshield washer switch information	–	–	OUT	–	–	IN
Yaw rate	–	–	OUT	IN	–	–

Malfunction diagnosis procedure

• If a vehicle with a malfunction in a system controlled by a CAN system related module is brought in, verify the repair order form and the malfunctioning symptom first, then perform CAN malfunction diagnosis to determine if the malfunction cause is in the CAN system or not.

• For CAN malfunction diagnosis, the voltage at the CAN connection terminal on the DLC-2 is measured, and based on the measured value, the CAN circuit can be examined or the malfunction symptom can be determined.

• If the malfunction symptom is not an open circuit, inspect the voltage or continuity at the CAN circuit and determine the malfunctioning location.

• If the malfunction symptom is an open circuit, determine the area of the open circuit by using the displayed communication error DTC and the module in which communication has failed.

Ex.) Open circuit location determination procedure

1. Verify the CAN system-related module DTCs and the failed module using the Mazda Modular Diagnostic System (M-MDS).

DTC output module

Mazda Modular Diagnostic System (M-MDS) display

Output DTC

PCM

PCM

U0121:00

Front body control module (FBCM)

F_BCM

U0121:00

TCM

TCM

U0121:00

Laser sensor

SCBS

U0121:00

Forward sensing camera (FSC)

FSC

U0121:00

Start stop unit

SSU

U0121:00

Start stop unit

SSU

U0121:87

EPS control module

EPS

U0121:00

Connectivity master unit

CMU

U0121:00

Vehicle control module (V/C-module)

SBS/MRCC

U0121:00

Instrument cluster

IC

U0121:00

DTC output module	Mazda Modular Diagnostic System (M-MDS) display	Output DTC
PCM	PCM	U0121:00
Front body control module (FBCM)	F_BCM	U0121:00
TCM	TCM	U0121:00
Laser sensor	SCBS	U0121:00
Forward sensing camera (FSC)	FSC	U0121:00
Start stop unit	SSU	U0121:00
Start stop unit	SSU	U0121:87
EPS control module	EPS	U0121:00
Connectivity master unit	CMU	U0121:00
Vehicle control module (V/C-module)	SBS/MRCC	U0121:00
Instrument cluster	IC	U0121:00

Module

Fail display

DSC HU/CM

×

Module	Fail display
DSC HU/CM	×

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2. The wiring harness between the DSC HU/CM and front body control module (FBCM), or the DSC HU/CM itself could have a malfunction because the DTCs indicating a communication error between the following units, in addition to "Fail" on the DSC HU/CM, are displayed even though communication between the PCM and instrument cluster is normal.

• Between DSC HU/CM and PCM

• Between DSC HU/CM and front body control module (FBCM)

• Between DSC HU/CM and TCM

• Between DSC HU/CM and laser sensor

• Between DSC HU/CM and forward sensing camera (FSC)

• Between DSC HU/CM and start stop unit

• Between DSC HU/CM and EPS control module

• Between DSC HU/CM and connectivity master unit

• Between DSC HU/CM and vehicle control-module (V/C-module)

• Between DSC HU/CM and instrument cluster

Local CAN

• Local CAN is used for communication between the following modules:

― Between PCM and TCM (ATX)

― Between connectivity master unit, CD unit, and tuner and amp unit (with center display)

― Between audio unit, Bluetooth^® unit, and CD unit (without center display)

― Between rear vehicle monitoring control module (LH) and rear vehicle monitoring control module (RH) (with rear vehicle monitoring system)

― Between BSM control module (LH) and BSM control module (RH) (with BSM system)

― Between vehicle control-module (V/C-module) and radar sensor (with Mazda Radar Cruise Control (MRCC) system)

LIN communication

• LIN communication is used for communication between the following modules:

― Between front body control module (FBCM) and rain sensor (with auto wiper/ auto light system)

― Between front body control module (FBCM) and current sensor (with i-ELOOP)

― Between front body control module (FBCM) and climate control unit (with manual air conditioner)

― Between AFS control module and swivel actuator (front combination light)

― Between PCM and active air shutter actuator

― Between connectivity master unit and commander switch (with center display)

ISO communication

• ISO communication is used for communication between the following modules:

― Between rear body control module (RBCM) and start stop unit

Construction

CAN

• The HS-CAN has terminator resistors built into the following units which form the CAN lines.

― Between PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2) terminals 2AK (CAN_H) and 2AL (CAN_L), resistance value: 124 ohms

― Between PCM (MZR 1.6) terminals 1BE (CAN_H) and 1AZ (CAN_L), resistance value: 124 ohms

― Between instrument cluster terminals B (CAN_H) and D (CAN_L), resistance value: 120 ohms

• The MS-CAN has terminal resistors built into the following units which form the CAN lines.

― Between rear body control module (RBCM) terminals 4G (CAN_H) and 4J (CAN_L), resistance value: 120 ohms

― Between instrument cluster terminals 2C (CAN_H) and 2E (CAN_L), resistance value: 120 ohms

Local CAN

• The local CAN has terminator resistors built into the following units which form the CAN lines.

― Between connectivity master unit terminals 2AK (CAN_H) and 2AL (CAN_L), resistance value: 124 ohms (with center display)

― Between tuner and amp unit terminals B (CAN_H) and D (CAN_L), resistance value: 120 ohms (with center display)

― Between audio unit terminals 1O (CAN_H) and 1Q (CAN_L), resistance value: 120 ohms (without center display)

― Between rear vehicle monitoring control module (LH) terminals H (CAN_H) and J (CAN_L), resistance value: 120 ohms

― Between rear vehicle monitoring control module (RH) terminals A (CAN_H) and D (CAN_L), resistance value: 120 ohms

― Between BSM control module (LH) terminals A (CAN_H) and B (CAN_L), resistance value: 120 ohms

― Between BSM control module (RH) terminals A (CAN_H) and B (CAN_L), resistance value: 120 ohms

― Between PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5) terminals 1A (CAN_H) and 1B (CAN_L), resistance value: 120 ohms

― Between PCM (SKYACTIV-D 2.2) terminals 1AD (CAN_H) and 1Y (CAN_L), resistance value: 120 ohms

― Between TCM terminals G (CAN_H) and H (CAN_L), resistance value: 120 ohms

― Between vehicle control-module (V/C-module) terminals AB (CAN_H) and AD (CAN_L), resistance value: 120 ohms

― Between radar sensor terminals D (CAN_H) and C (CAN_L), resistance value: 120 ohms

LIN communication

• The LIN communication has drivers built into the following units which form the LIN communication lines.

― PCM

― AFS control module

― Front body control module (FBCM)

― Rain sensor

― Current sensor

― Climate control unit (with manual air conditioner)

― Swivel actuator (front combination light)

― Active air shutter actuator

ISO communication

• The ISO communication has drivers built into the following units which form the ISO communication lines.

― Start stop unit

― Rear body control module (RBCM)