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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Inner rear view mirror assembly indicator light does not come on when ignition switch is turned from off to ON | Inner rear view mirror assembly | |
| Harness or connector | - | |
| Inner rear view mirror assembly indicator light remains on or flashes when inner rear view mirror assembly AUTO switch is pressed | Inner rear view mirror assembly | |
| Automatic high beam indicator light (green) does not come on when automatic high beam system is in standby mode (automatic light control system operates normally) | Combination meter assembly | |
| Main body ECU (Multiplex network body ECU) | ||
| Automatic high beam indicator light (green) does not come on when automatic high beam system is in standby mode (automatic light control system does not operate) | Check DTCs | |
| AFS ECU power source circuit | ||
| Headlight solenoid circuit | ||
| Headlight dimmer switch circuit | ||
| Check automatic light control system operation | ||
| Check Data List (Auto H Beam STS) | ||
| Inner rear view mirror assembly | ||
| AFS ECU (Headlight swivel ECU assembly) | ||
| Main body ECU (Multiplex network body ECU) | ||
| Automatic high beam indicator light (amber) comes on (w/ Multi-information Display (Segment LCD Type)) | Check DTCs | |
| Main body ECU (Multiplex network body ECU) | ||
| Combination meter assembly | ||
| "CHECK AHB SYSTEM" message is indicated on the multi-information display (w/ Multi-information Display (Dot LCD Type)) | Check DTCs | |
| Main body ECU (Multiplex network body ECU) | ||
| Combination meter assembly |
Tech Tips
Camera detection malfunctions can be detected using the GTS. Under the following conditions, if the camera built into the inner rear view mirror assembly cannot detect other vehicles or lights correctly, it will stop automatic high beam control and turn off the automatic high beam indicator light:
When the front windshield is not clear (ice, snow or frost on the glass).
When the front windshield is dirty (sand, mud, water stains or bugs are on the glass).
Aiming misalignment of the camera can be detected using the GTS. If the camera aiming is misaligned, check the following conditions:
Check if the vehicle is inclined.
Check if the windshield glass is installed correctly.
Check if the inner rear view mirror assembly is installed correctly.
Check if there is deformation of the camera or stay of the inner rear view mirror assembly.