LANE-KEEPING ASSIST SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Lane-keeping assist system does not operate | Main switch circuit | |
| Object recognition camera | ||
| Object recognition ECU | ||
| Harness or connector | - | |
| Driving support ECU | ||
| LKA indicator light abnormal (Does not turn on) | Indicator light circuit | |
| Main switch circuit | ||
| No. 1 meter ECU sub-assembly | ||
| Driving support ECU | ||
| LKA indicator light abnormal (Remains on) | Indicator light circuit | |
| Main switch circuit | ||
| No. 1 meter ECU sub-assembly | ||
| Driving support ECU | ||
| Lane-keeping assist system is not canceled even when turn signal light switch is operated. | Turn signal light switch | |
| Harness or connector | - | |
| Driving support ECU | ||
| Lane-keeping assist system is not canceled even when windshield wiper switch is operated (Lo or Hi) | Windshield wiper switch | |
| Harness or connector | - | |
| Driving support ECU | ||
| Increase in cases that driver can see line marker but system cannot detect lane markers | Windshield glass is dirty | - |
| Object recognition camera is dirty | - | |
| Adjust object recognition camera | ||
| Driving support ECU | ||
| Lane-keeping assist system is operating, but no operation condition is displayed on multi-information display in combination meter | No. 1 meter ECU sub-assembly | |
| Driving support ECU | ||
| Buzzer does not sound even when lane markers are lost during lane departure warning function | Skid control buzzer | |
| Skid control ECU (for LHD) | ||
| Skid control ECU (for RHD) | ||
| Driving support ECU | ||
| Lane-keeping assist system cannot detect line marker during nighttime | Headlight assembly (for HID) | |
| Headlight assembly (for LED) | ||
| Multiplex network front light ECU (Front controller) | - | |
| Driving support ECU |