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 "Check Bus 2 Lines for Short Circuit". | Check Bus 2 Lines for Short Circuit | |
| 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 | |
| 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 | |
| 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 "Check Bus 3 Lines for Short Circuit". | Check Bus 3 Lines for Short Circuit | |
| 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 | |
| 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 | |
| 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 "Check Bus 5 Lines for Short Circuit". | Check Bus 5 Lines for Short Circuit | |
| The result of "How to Proceed with Troubleshooting" is "Check Bus 5 Line for Short to +B". | Check Bus 5 Line for Short to +B | |
| The result of "How to Proceed with Troubleshooting" is "Check Bus 5 Line for Short to GND". | Check Bus 5 Line for Short to GND | |
| 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 Bus Check procedure. the DTCs output from ECUs connected to the CAN communication system.
| Symptom | Suspected Area | Link |
|---|---|---|
| Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the GTS. | Skid Control ECU Communication Stop Mode | |
| Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the GTS. | Air Conditioning Amplifier 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 "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 "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 "Four Wheel Drive Control" is indicated on the "Communication Bus Check" screen of the GTS. | 4WD Control ECU Communication Stop Mode | |
| Communication stop for "Display and Navigation (AVN1)" is indicated on the "Communication Bus Check" screen of the GTS. | Navigation ECU Communication Stop Mode | |
| Communication stop for "Display and Navigation (AVN1)" is indicated on the "Communication Bus Check" screen of the GTS. | Audio Receiver Assembly Communication Stop Mode | |
| Communication stop for "Front Radar" is indicated on the "Communication Bus Check" screen of the GTS. | Millimeter Wave Radar Sensor Communication Stop Mode | |
| Communication stop for "Front Camera Module" is indicated on the "Communication Bus Check" screen of the GTS. | Front Camera Module 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. |