CAN COMMUNICATION SYSTEM PROBLEM SYMPTOMS TABLE

Tip:

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here

Table 1. Result List of How to Proceed with Troubleshooting
Symptom	Suspected Area	Link
The result of "How to Proceed with Troubleshooting" is "Open in CAN Main Bus Line".	Open in CAN Main Bus Line (Includes DLC3 branch lines and terminating resistors)	Click here Click here
The result of "How to Proceed with Troubleshooting" is "Short in CAN Bus Lines".	Short in CAN Bus Lines	Click here 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 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 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 Click here

Tip:

Refer to How to Proceed with Troubleshooting for the V bus check procedure.

Table 2. Communication Stop Mode Table
The suspected communication stop area can be determined based on the ECU or sensor that was not displayed in CAN Bus Check and by referring to the table below.
Symptom	Suspected Area	Link
"Skid Control (ABS/VSC/TRAC)" is not displayed on the GTS.	Brake Actuator (Skid Control ECU) Communication Stop Mode	Click here
"Air Conditioning Amplifier" is not displayed on the GTS.	Air Conditioning Amplifier Communication Stop Mode	Click here
"Power Steering (EPS)" is not displayed on the GTS.	Power Steering ECU Communication Stop Mode	Click here
"Spiral cable (Steering Angle Sensor)" is not displayed on the GTS.	Steering Angle Sensor Communication Stop Mode	Click here
"ECM (Engine)" and "TCM"* are not displayed on the GTS.	ECM Communication Stop Mode	Click here Click here
"Combination Meter" is not displayed on the GTS.	Combination Meter ECU Communication Stop Mode	Click here
"Certification (Smart)" is not displayed on the GTS.	Certification ECU Communication Stop Mode	Click here
"Airbag" is not displayed on the GTS.	Center Airbag Sensor Communication Stop Mode	Click here
"Stop and Go/Start" is not displayed on the GTS.	Engine Stop and Start ECU Communication Stop Mode	Click here
"Display and Navigation (AVN1)" is not displayed on the GTS.	Radio Receiver Assembly Communication Stop Mode	Click here
"Front Camera Module" is not displayed on the GTS.	Front Camera Module Communication Stop Mode	Click here Click here

Tip:

*: w/ Multi-mode Manual Transaxle System


Symptom	Suspected Area	Link
Although CAN communication (V bus) is currently normal, ECUs connected to the V bus store CAN communication DTCs.	The probable part for which communication is interrupted can be determined using DTC combination table and comparing the DTCs output from ECUs connected to the CAN communication system	Click here Click here