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.
When replacing the combination meter assembly, make sure to replace it with a newone.
| Symptom | Suspected Area | Link |
|---|---|---|
| Lane departure alert system does not operate | Lane departure warning camera power source circuit | |
| Driving support ECU assembly power source circuit (w/ Dynamic Rader Cruise Control System) | ||
| Steering pad switch circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Lane departure warning camera | ||
| Lane departure alert indicator abnormal (Does not turn on) | Lane departure alert indicator circuit | |
| Steering pad switch circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| Lane departure warning camera | ||
| Lane departure alert indicator abnormal (Remains on) | Lane departure alert indicator circuit | |
| Steering pad switch circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| Lane departure warning camera | ||
| Lane departure alert system is not canceled even when turn signal light switch is operated | Data List / Active Test | |
| Turn signal light switch circuit | ||
| Lane departure warning camera | ||
| Increase in cases in which driver can see lane markers but system cannot detect lane markers | Windshield glass is dirty | - |
| Lane departure warning camera is dirty | - | |
| Object placed on top of instrument panel | - | |
| Headlight assemblies are dirty or worn | - | |
| Replacement with suspension outside of specifications | - | |
| Replacement with tire size outside of specifications | - | |
| Replacement with windshield outside of specifications | - | |
| Foreign objects stuck between windshield glass and lane departure warning camera | - | |
| Stickers, etc. attached to camera area | - | |
| Adjustment of lane departure warning camera | ||
| Lane departure warning camera | ||
| Lane departure alert system is operating, but no operation condition is displayed on multi-information display in combination meter assembly | Data List / Active Test | |
| Combination meter assembly | ||
| Lane departure warning camera | ||
| Buzzer does not sound even when lane markers are lost while lane departure warning function is operating | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Combination meter assembly | ||
| Lane departure warning camera |