Diagnosis System

CAN BUS CHECK
1. Using the Techstream, select "CAN Bus Check" from the "System Select".

CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION

Systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs, sensors) are installed on the vehicle.

HINT:

ECUs and sensors that are connected to the LIN communication system and the local CAN system are also displayed.

ECU SENSOR NAME REFERENCE

ECU/Sensor Name	Check Method
ECM	Installed on all vehicles
Combination meter	Installed on all vehicles
Air conditioning amplifier	Installed on all vehicles
Center airbag sensor	Installed on all vehicles
Power steering ECU	Installed on all vehicles
Main body ECU	Installed on all vehicles
Skid control ECU	Installed on all vehicles
Steering angle sensor	w/VSC
Yaw rate sensor	w/VSC
Certification ECU	w/ Smart key system

DTC TABLE BY ECU

HINT:

In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the Techstream.
If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

SKID CONTROL ECU (w/o VSC)

HINT:

DTC communication uses the CAN communication system.

DTC REFERENCE CHART

DTC No.	Detection Item
U0073	Control Module Communication Bus Off

SKID CONTROL ECU (w/ VSC)

HINT:

DTC communication uses the CAN communication system.

DTC REFERENCE CHART

DTC No.	Detection Item
U0073	Control Module Communication Bus Off
U0100	Lost Communication with ECM/PCM "A"
U0123	Lost Communication with Yaw Rate Sensor Module
U0124	Lost Communication with Lateral Acceleration Sensor Module
U0126	Lost Communication with Steering Angle Sensor Module

AIR CONDITIONING AMPLIFIER

HINT:

DTC communication uses the CAN communication system.
The following DTC is output only for current malfunctions.

DTC REFERENCE CHART

DTC No.	Detection Item
B1499	Multiplex Communication Circuit

COMBINATION METER

HINT:

DTC communication uses the CAN communication system.

DTC REFERENCE CHART

DTC No.	Detection Item
U0100	Lost Communication with ECM/PCM "A"
U0129	Lost Communication with Brake System Control Module

POWER STEERING ECU

HINT:

DTC communication uses the CAN system.

DTC REFERENCE CHART

DTC No.	Detection Item
U0100	Lost Communication with ECM
U0129	Lost Communication with Anti-lock Brake System (ABS) Control Module

MAIN BODY ECU

HINT:

DTC communication uses the CAN system.

DTC REFERENCE CHART

DTC No.	Detection Item
U0327	Software Incompatibility with Vehicle Security Control Module
U1002	Lost Communication with Gateway Module

ECM
HINT:

The ECM is connected to the CAN communication system, but CAN communication DTCs are not output.
CENTER AIRBAG SENSOR
HINT:

The center airbag sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
STEERING ANGLE SENSOR (w/ VSC)
HINT:

The steering angle sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
YAW RATE SENSOR (w/ VSC)
HINT:

The yaw rate sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
CERTIFICATION ECU
HINT:

The certification ECU is connected to the CAN communication system, but CAN communication DTCs are not output.

DTC COMBINATION TABLE

CAN No. 1 Bus (w/o VSC)

DTC CHART

DTC		Trouble Mode
Output from	Output DTC	ECM Communlcation Stop Mode	Skid Control ECU Communlcation Stop Mode	Power Steering ECU Communication Stop Mode	Center Airbag Sensor Communication Stop Mode	Air Conditioning Amplifier Communlcation Stop Mode	Combination Meter ECU Communlcation Stop Mode	Main Body ECU Communlcation Stop Mode
Skid Control ECU	U0073	X	O*1	X	X	X	X	X
Combination Meter	U0100	O	X	X	X	X	O*1	X
Combination Meter	U0129	X	O	X	X	X	O*1	X
Power Steering ECU	U0100	O	X	O*1	X	X	X	X
Power Steering ECU	U0129	X	O	O*1	X	X	X	X

HINT:

O: Set
X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
*1: Does not output it during communication error

CAN No. 1 Bus (w/ VSC)

DTC CHART

DTC		Trouble Mode
Output from	Output DTC	ECM Communication Stop Mode	Skid Control ECU Communication Stop Mode	Steering Angle Sensor Communication Stop Mode	Yaw Rate Sensor Communication Stop Mode	Power Steering ECU Communication Stop Mode
Skid Control ECU	U0073	X	O*1	X	X	X
	U0100	O	O*1	X	X	X
	U0123	X	O*1	X	O	X
	U0124	X	O*1	X	O	X
	U0126	X	O*1	O	X	X
Combination Meter	U0100	O	X	X	X	X
Combination Meter	U0129	X	O	X	X	X
Power Steering ECU	U0100	O	X	X	X	O*1
Power Steering ECU	U0129	X	O	X	X	O*1
HINT: O: Set X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens *1: Does not output it during communication error

DTC CHART

DTC		Trouble Mode
Output from	Output DTC	Center Airbag Sensor Communication Stop Mode	Air Conditioning Amplifier Communication Stop Mode	Combination Meter ECU Communication Stop Mode	Main Body ECU Communication Stop Mode
Skid Control ECU	U0073	X	X	X	X
	U0100	X	X	X	X
	U0123	X	X	X	X
	U0124	X	X	X	X
	U0126	X	X	X	X
Combination Meter	U0100	X	X	O*1	X
Combination Meter	U0129	X	X	O*1	X
Power Steering ECU	U0100	X	X	X	X
Power Steering ECU	U0129	X	X	X	X

HINT:

O: Set
X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
*1: Does not output it during communication error
ECM Communication Stop Mode (See ECM COMMUNICATION STOP MODE )
Skid Control ECU Communication Stop Mode (See SKID CONTROL ECU COMMUNICATION STOP MODE )
Steering Angle Sensor Communication Stop Mode (See STEERING ANGLE SENSOR COMMUNICATION STOP MODE )
Yaw Rate Sensor Communication Stop Mode (See YAW RATE SENSOR COMMUNICATION STOP MODE )
Combination Meter Communication Stop Mode (See COMBINATION METER ECU COMMUNICATION STOP MODE )
Air Conditioning Amplifier Communication Stop Mode (See AIR CONDITIONING AMPLIFIER COMMUNICATION STOP MODE )
Center Airbag Sensor Communication Stop Mode (See CENTER AIRBAG SENSOR COMMUNICATION STOP MODE )
Power Steering ECU Communication Stop Mode (See POWER STEERING ECU COMMUNICATION STOP MODE )
Main Body ECU Communication Stop Mode (See MAIN BODY ECU COMMUNICATION STOP MODE )