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.
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Open in CAN Main Bus Line | Open in CAN Main Wire | Click here |
| Short in CAN Bus Lines | Open in CAN Main Wire | Click here |
| Short to +B in CAN Bus Line | Short to B+ in CAN Bus Line | Click here |
| Short to GND in CAN Bus Line | Short to GND in CAN Bus Line | Click here |
| Open in One Side of CAN Branch Line | Open in One Side of CAN Branch Line | Click here |
Tech Tips
Refer to How to Proceed with Troubleshooting for the V Bus Check procedure.
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 GTS | Skid Control ECU Communication Stop Mode | Click here |
| "Air Conditioning Amplifier" is not displayed on GTS | Air Conditioning Amplifier Communication Stop Mode | |
| "Power Steering (EPS)" is not displayed on GTS | Power Steering ECU Communication Stop Mode | |
| "Spiral cable (Steering Angle Sensor)" is not displayed on GTS (w/ Vehicle Stability Control System) | Steering Angle Sensor Communication Stop Mode | Click here |
| "ECM (Engine)" is not displayed on the GTS | ECM Communication Stop Mode | Click here |
| "Main Body" is not displayed on the GTS | Main Body ECU Communication Stop Mode | 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 (w/ Entry and Start System) | 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 (w/ Stop and Start System) | Engine Stop and Start ECU Communication Stop Mode | Click here |
| "Four Wheel Drive" is not displayed on the GTS (for 4WD/AWD) | 4WD Control ECU Communication Stop Mode | Click here |
| "Display and Navigation (AVN1)" is not displayed on the GTS (for Radio and Display Type) | Audio Receiver Assembly Communication Stop Mode | |
| "Display and Navigation (AVN1)" is not displayed on the GTS (for Navigation Receiver Type) | Navigation ECU Communication Stop Mode | Click here |
| "Blind Spot Monitor Master" is not displayed on the GTS (w/ Blind Spot Monitor System) | Blind Spot Monitor Sensor Communication Stop Mode | |
| "Front Camera Module" is not displayed on the GTS (w/ Lane Departure Alert System) | Lane Departure Warning Camera Communication Stop Mode |
| 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 Communication Table and comparing the DTCs output from ECUs connected to the CAN communication system |