Problem Symptoms Table [04/2013 - 10/2016]
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2020 Lexus IS 350, 2020 Lexus IS 300, 2019 Lexus IS 350, 2019 Lexus IS 300, and 2018 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- 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.
AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic headlight beam level control system does not operate | Check DTCs | Refer to DTC CHECK / CLEAR [04/2013 - 09/2020] |
| Check fail-safe function | Refer to FAIL-SAFE CHART [04/2013 - 10/2016] | |
| Headlight leveling ECU power source circuit | Refer to Headlight Leveling ECU Power Source Circuit [04/2013 - 10/2016] | |
| Headlight beam level control actuator circuit | Refer to Headlight Beam Level Control Actuator Circuit [04/2013 - 10/2016] | |
| Headlight leveling ECU assembly | Refer to REMOVAL [04/2013 - 10/2016] | |
| Initialization cannot be performed | Check DTCs | Refer to DTC CHECK / CLEAR [04/2013 - 09/2020] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016] | |
| Headlight leveling ECU assembly | Refer to REMOVAL [04/2013 - 10/2016] | |
| Headlight leveling warning light does not come on when turning the engine switch on (IG) | Headlight leveling ECU assembly | Refer to REMOVAL [04/2013 - 10/2016] |
| Combination meter assembly | Refer to REMOVAL [04/2013 - 10/2016] |
NOTE:
- Initialize the headlight leveling ECU assembly after the vehicle height changes due to replacement of suspension components or after performing operations such as removal and reinstallation or replacement of the rear height control sensor sub-assembly.
- When the headlight leveling ECU assembly is replaced, initialization is also necessary.