NETWORKING CAN COMMUNICATION SYSTEM PROBLEM SYMPTOMS TABLE

HINT:: ·

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.

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Inspect the fuses and relays related to this system before inspecting the suspected areas below.

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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.

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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)
The result of "How to Proceed with Troubleshooting" is "Short in CAN Bus Lines".	Short in CAN Bus Lines
The result of "How to Proceed with Troubleshooting" is "Short to +B in CAN Bus Line".	Short to +B in CAN Bus Line
The result of "How to Proceed with Troubleshooting" is "Short to GND in CAN Bus Line".	Short to GND in CAN Bus Line
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

HINT:: 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.

Communication Stop Mode Table
Symptom	Suspected Area	Link
"Skid Control (ABS/VSC/TRAC)" is not displayed on the GTS.	Brake Actuator (Skid Control ECU) Communication Stop Mode
"Air Conditioning Amplifier" is not displayed on the GTS.	Air Conditioning Amplifier Communication Stop Mode
"Power Steering (EPS)" is not displayed on the GTS.	Power Steering ECU Communication Stop Mode
"ECM (Engine)" is not displayed on the GTS.	ECM Communication Stop Mode
"Main Body" is not displayed on the GTS.	Main Body ECU Communication Stop Mode
"Combination Meter" is not displayed on the GTS.	Combination Meter ECU Communication Stop Mode
"Airbag" is not displayed on the GTS.	Center Airbag Sensor Communication Stop Mode
"Spiral cable (Steering Angle Sensor)" is not displayed on the GTS.	Steering Angle Sensor Communication Stop Mode
"Certification (Smart)" is not displayed on the GTS.	Certification ECU Communication Stop Mode

Symptom	Suspected Area	Link
Although CAN communication is currently normal, an ECU connected to the CAN communication system has 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.