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 |
|---|---|---|
| The result of "How to Proceed with Troubleshooting" is "Open in Bus 2 Main Bus Line". | Open in Bus 2 Main Bus Line | |
| The result of "How to Proceed with Troubleshooting" is "Short in Bus 2 Lines". | Short in Bus 2 Lines | |
| The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 2 Line". | Short to +B in Bus 2 Line | |
| The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 2 Line". | Short to GND in Bus 2 Line | |
| 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 | |
| The result of "How to Proceed with Troubleshooting" is "Open in Bus 3 Main Bus Line". | Open in Bus 3 Main Bus Line | |
| The result of "How to Proceed with Troubleshooting" is "Short in Bus 3 Lines". | Short in Bus 3 Lines | |
| The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 3 Line". | Short to +B in Bus 3 Line | |
| The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 3 Line". | Short to GND in Bus 3 Line | |
| 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 | |
| The result of "How to Proceed with Troubleshooting" is "Open in Bus 5 Main Bus Line". | Open in Bus 5 Main Bus Line | |
| The result of "How to Proceed with Troubleshooting" is "Short in Bus 5 Lines". | Short in Bus 5 Lines | |
| The result of "How to Proceed with Troubleshooting" is "Short to +B in Bus 5 Line". | Short to +B in Bus 5 Line | |
| The result of "How to Proceed with Troubleshooting" is "Short to GND in Bus 5 Line". | Short to GND in Bus 5 Line | |
| The result of "How to Proceed with Troubleshooting" is "Open in One Side of Bus 5 Branch Line". | Open in One Side of Bus 5 Branch Line |
Tech Tips
Refer to How to Proceed with Troubleshooting for the V bus check procedure.
| Symptom | Suspected Area | Link |
|---|---|---|
| Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the GTS. | Brake Actuator (Skid Control ECU) Communication Stop Mode | |
| Communication stop for "Clearance Warning (Clearance Sonar)" is indicated on the "Communication Bus Check" screen of the GTS. | Clearance Warning ECU Communication Stop Mode | |
| Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the GTS. | Air Conditioner Amplifier Communication Stop Mode | |
| Communication stop for "Power Steering (EPS)" is indicated on the "Communication Bus Check" screen of the GTS. | Power Steering ECU Communication Stop Mode | |
| 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 | |
| Communication stop for "ECM (Engine)" is indicated on the "Communication Bus Check" screen of the GTS. | ECM Communication Stop Mode | |
| Communication stop for "Main Body" is indicated on the "Communication Bus Check" screen of the GTS. | Main Body ECU Communication Stop Mode | |
| Communication stop for "Combination Meter" is indicated on the "Communication Bus Check" screen of the GTS. | Combination Meter ECU Communication Stop Mode | |
| Communication stop for "Certification (Smart)" is indicated on the "Communication Bus Check" screen of the GTS. | Certification ECU Communication Stop Mode | |
| Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS. | Center Airbag Sensor Communication Stop Mode | |
| Communication stop for "Headlight swivel (AFS)" is indicated on the "Communication Bus Check" screen of the GTS. | AFS ECU Communication Stop Mode | |
| Communication stop for "Electric Parking Brake" is indicated on the "Communication Bus Check" screen of the GTS. | Electric Parking Brake ECU Communication Stop Mode | |
| Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS. | Engine Stop and Start ECU Communication Stop Mode | |
| Communication stop for "Blind Spot Monitor Master" is indicated on the "Communication Bus Check" screen of the GTS. | Blind Spot Monitor Sensor Communication Stop Mode | |
| Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the GTS. | Navigation Receiver Assembly Communication Stop Mode |
| Symptom | Suspected Area | Link |
|---|---|---|
| Although CAN communication is currently normal, ECUs connected to the bus 2, bus 3 and bus 5 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 |