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 CAN Main Bus Line". | Open in CAN Main Bus Line (for LHD) (Includes DLC3 branch lines and terminating resistors) | |
| Open in CAN Main Bus Line (for RHD) (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 (for LHD) | |
| Short in CAN Bus Lines (for RHD) | ||
| The result of "How to Proceed with Troubleshooting" is "Short to +B in CAN Bus Line". | Short to +B in CAN Bus Line (for LHD) | |
| Short to +B in CAN Bus Line (for RHD) | ||
| The result of "How to Proceed with Troubleshooting" is "Short to GND in CAN Bus Line". | Short to GND in CAN Bus Line (for LHD) | |
| Short to GND in CAN Bus Line (for RHD) | ||
| 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 |
Tech Tips
Refer to How to Proceed with Troubleshooting for the V Bus Check procedure.
| Symptom | Suspected Area | Link |
|---|---|---|
| "Skid Control (ABS/VSC/TRAC)" is not displayed on the GTS. | Skid Control ECU Communication Stop Mode | |
| "Air Conditioning Amplifier" is not displayed on the GTS. | Air Conditioner Amplifier Communication Stop Mode | |
| "Power Steering (EPS)" is not displayed on the GTS. | Power Steering ECU Communication Stop Mode | |
| "CAN Gateway1" is not displayed on the GTS.*1 | Gateway ECU Communication Stop Mode | |
| "Spiral cable (Steering Angle Sensor)" is not displayed on the GTS. | Steering Angle Sensor Communication Stop Mode | |
| "Yaw Rate Sensor" is not displayed on the GTS. | Yaw Rate Sensor Communication Stop Mode | |
| "ECM (Engine)" are 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 | |
| "Certification (Smart)" is not displayed on the GTS. | 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. | AFS ECU Communication Stop Mode | |
| "Display and Navigation (AVN1)" is not displayed on the GTS. | Radio Receiver Assembly Communication Stop Mode | |
| "Hybrid Vehicle Control" and/or "Power management1" are not displayed on the GTS. | Power Management Control ECU Communication Stop Mode | |
| "Active Sound Control" is not displayed on the GTS.*2 | ASC ECU Communication Stop Mode |
Tech Tips
*1: w/ Network gateway ECU
*2: w/ ASC system
| 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 Combination Table and comparing the DTCs output from ECUs connected to the CAN communication system |