Problem Symptoms Table [08/2013 - ]
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
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.
NOTE:
If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [08/2013 - ] .
AUTOMATIC HIGH BEAM SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Automatic high beam indicator on the combination meter assembly does not illuminate. | Check operating conditions | Refer to OPERATION CHECK [08/2013 - ] |
| Combination meter assembly | Refer to REMOVAL [08/2013 - ] | |
| Lane departure warning camera | Refer to REMOVAL [08/2013 - ] | |
| Driving support ECU assembly*1 | Refer to REMOVAL [08/2013 - ] | |
| Main body ECU (multiplex network body ECU) | Refer to REMOVAL [08/2013 - ] | |
| Automatic high beam system does not operate. | Check Data List (Auto H Beam STS) | Refer to DATA LIST / ACTIVE TEST [08/2013 - ] |
| Automatic high beam switch circuit | Refer to Automatic High Beam Switch Circuit [08/2013 - ] | |
| Low beam headlight circuit | Refer to Low Beam Headlight Circuit [08/2013 - ] | |
| High beam headlight circuit | Refer to High Beam Headlight Circuit [08/2013 - ] | |
| Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [08/2013 - ] | |
| Check automatic light control system operation | Refer to OPERATION CHECK [08/2013 - ] | |
| Lane departure warning camera power source circuit*1 | Refer to Power Source Circuit [08/2013 - ] | |
| Lane departure warning camera power source circuit*2 | Refer to Power Source Circuit [08/2013 - ] | |
| Lane departure warning camera | Refer to REMOVAL [08/2013 - ] | |
| Driving support ECU assembly*1 | Refer to REMOVAL [08/2013 - ] | |
| Main body ECU (multiplex network body ECU) | Refer to REMOVAL [08/2013 - ] |
- *1: w/ Dynamic Radar Cruise Control System
- *2: w/o Dynamic Radar Cruise Control System
HINT:
- Camera detection malfunctions can be detected using the Techstream.
- Aiming misalignment of the camera can be detected using the Techstream. 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 lane departure warning camera is installed correctly.
- Check if there is deformation of the lane departure warning camera.