CAN COMMUNICATION SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Result List of Check CAN Bus Line
Symptom	Suspected Area	See page
The result of "How to proceed with Troubleshooting" is "Open in CAN Main Wire".	Open in CAN Main Wire	Click here
The result of "How to Proceed with Troubleshooting" is "Short in CAN Bus Lines".	Short in CAN Bus Lines	Click here
The result of "How to Proceed with Troubleshooting" is "Open in One Side of CAN Branch Line".	Open in One Side of CAN Branch Line	Click here
The result of "How to Proceed with Troubleshooting" is "Short to B+ in CAN Bus Line".	Short to B+ in CAN Bus Line	Click here
The result of "How to Proceed with Troubleshooting" is "Short to GND in CAN Bus Line".	Short to GND in CAN Bus Line	Click here

Communication Stop Mode Table
Symptom	Suspected Area	See page
"ABS/VSC/TRAC" is not displayed on the intelligent tester.	Brake Actuator (Skid Control ECU) Communication Stop Mode	Click here
"Air Conditioner" is not displayed on the intelligent tester.	Air Conditioning Amplifier Communication Stop Mode	Click here
"EPS" is not displayed on the intelligent tester.	Power Steering ECU Communication Stop Mode	Click here
"Steering Angle Sensor" is not displayed on the intelligent tester.	Steering Angle Sensor Communication Stop Mode	Click here
"Yaw Rate / Deceleration" is not displayed on the intelligent tester.	Yaw Rate Sensor Communication Stop Mode	Click here
"Engine" is not displayed on the intelligent tester.	ECM Communication Stop Mode	Click here
"Main Body" is not displayed on the intelligent tester.	Main Body ECU Communication Stop Mode	Click here
"Power Management1" and "Power Management2" are not displayed on the intelligent tester.	Power Management Control ECU Communication Stop Mode	Click here
"Combination Meter" is not displayed on the intelligent tester.	Combination Meter ECU Communication Stop Mode	Click here
"SRS Airbag" is not displayed on the intelligent tester.	Center Airbag Sensor Communication Stop Mode	Click here
"Entry & Start / Wireless Tuner" is not displayed on the intelligent tester.	Certification ECU Communication Stop Mode	Click here
"Electric Parking Brake" is not displayed on the intelligent tester.	Electric Parking Brake ECU Communication Stop Mode	Click here