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	See page
The result of "How to Proceed with Troubleshooting" is "Open in Bus 2 Main Bus Line".	Open in Bus 2 Main Bus Line	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 2 Lines for Short Circuit".	Check Bus 2 Lines for Short Circuit	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 2 Line for Short to +B".	Check Bus 2 Line for Short to +B	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 2 Line for Short to GND".	Check Bus 2 Line for Short to GND	Click here
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 2 Branch Line".	Open in One Side of Bus 2 Branch Line	Click here
The result of "How to Proceed with Troubleshooting" is "Open in Bus 3 Main Bus Line".	Open in Bus 3 Main Bus Line	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 3 Lines for Short Circuit".	Check Bus 3 Lines for Short Circuit	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 3 Line for Short to +B".	Check Bus 3 Line for Short to +B	Click here
The result of "How to Proceed with Troubleshooting" is "Check Bus 3 Line for Short to GND".	Check Bus 3 Line for Short to GND	Click here
The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 3 Branch Line".	Open in One Side of Bus 3 Branch Line	Click here

Tip:

Refer to How to Proceed with Troubleshooting for the Bus Check procedure.

Table 2. Communication Stop Mode Table
Symptom	Suspected Area	See page
Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the GTS.	ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode	Click here
Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the GTS.	Air Conditioning Amplifier Communication Stop Mode	Click here
Communication stop for "Power Steering (EPS)" is indicated on the "Communication Bus Check" screen of the GTS.	Power Steering ECU Communication Stop Mode	Click here
Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "Communication Bus Check" screen of the GTS.	Steering Angle Sensor Communication Stop Mode	Click here
Communication stop for "Yaw Rate Sensor" is indicated on the "Communication Bus Check" screen of the GTS.	Yaw Rate Sensor Communication Stop Mode	Click here
Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the GTS.	ECM Communication Stop Mode	Click here
Communication stop for "Main Body" is indicated on the "Communication Bus Check" screen of the GTS.	Main Body ECU Communication Stop Mode	Click here
Communication stop for "Power Management1" is indicated on the "Communication Bus Check" screen of the GTS. (w/ Entry and Start System)	Power Management Control ECU Communication Stop Mode	Click here
Communication stop for "Combination Meter" is indicated on the "Communication Bus Check" screen of the GTS.	Combination Meter ECU Communication Stop Mode	Click here
Communication stop for "Certification (Smart)" is indicated on the "Communication Bus Check" screen of the GTS. (w/ Entry and Start System)	Certification ECU Communication Stop Mode	Click here
Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS.	Center Airbag Sensor Communication Stop Mode	Click here
Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS. (w/ Stop and Start System)	Engine Stop and Start ECU Communication Stop Mode	Click here
Communication stop for "Display and Navigation (AVN1)" is indicated on the "Communication Bus Check" screen of the GTS. (for Radio and Display Type)	Display and Navigation Assembly Communication Stop Mode	Click here
Communication stop for "CAN Gateway" is indicated on the "Communication Bus Check" screen of the GTS.	Central Gateway ECU Communication Stop Mode	Click here
Communication stop for "Front Camera Module" is indicated on the "Communication Bus Check" screen of the GTS. (w/ Pre-collision System)	Front Camera Module Communication Stop Mode	Click here

Table 3. DTC Combination Table
Symptom	Suspected Area	See page
Although CAN communication is currently normal, ECUs connected to each 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