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 | |
| Short in CAN Bus Lines | Short in CAN Bus Lines | |
| Short to +B in CAN Bus Line | Short to B+ in CAN Bus Line | |
| Short to GND in CAN Bus Line | Short to GND in CAN Bus Line | |
| Open in One Side of CAN Branch Line | Open in One Side of CAN Branch Line |
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 | |
| "Air Conditioning Amplifier" is not displayed on GTS | Air Conditioning Amplifier Communication Stop Mode | |
| "Spiral cable (Steering Angle Sensor)" is not displayed on GTS | Steering Angle Sensor Communication Stop Mode | |
| "ECM (Engine)" is not displayed on the GTS | ECM Communication Stop Mode | |
| "Combination Meter" is not displayed on the GTS | Combination Meter ECU Communication Stop Mode | |
| "Certification (Smart)" is not displayed on the GTS (w/ Smart Entry and Start System) | Certification ECU Communication Stop Mode | |
| "Airbag" is not displayed on the GTS | Center Airbag Sensor Communication Stop Mode | |
| "Headlight swivel (AFS)" is not displayed on the GTS (for LED Headlight) | AFS ECU Communication Stop Mode | |
| "Four Wheel Drive Control" is not displayed on the GTS | 4WD Control ECU Communication Stop Mode | |
| "Display and Navigation (AVN1)" is not displayed on the GTS (w/ Navigation System) | Navigation ECU Communication Stop Mode | |
| "Display and Navigation (AVN1)" is not displayed on the GTS (w/ Audio and Visual System) | Audio Receiver Assembly Communication Stop Mode | |
| "Back Door" is not displayed on the GTS (w/ Power Back Door System) | Power Back Door ECU 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 |