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.
AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL
| Symptom | Suspected Area | See |
|---|---|---|
| Headlight beam level control indicator light flashes. | Check DTCs | Refer to DTC CHECK / CLEAR [08/2013 - ] |
| Indicator circuit | Refer to Indicator Circuit [08/2013 - ] | |
| Headlight leveling ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| Headlight beam level control does not operate (indicator light is off). | Check the FAIL-SAFE function | Refer to FAIL-SAFE CHART [08/2013 - ] |
| Check DTCs | Refer to DTC CHECK / CLEAR [08/2013 - ] | |
| Headlight leveling ECU power source circuit | Refer to Headlight Leveling ECU Power Source Circuit [08/2013 - ] | |
| Headlight signal circuit | Refer to Headlight Signal Circuit [08/2013 - ] | |
| Headlight beam level control actuator circuit | Refer to Headlight Beam Level Control Actuator Circuit [08/2013 - ] | |
| Speed signal circuit | Refer to Speed Signal Circuit [08/2013 - ] | |
| Headlight leveling ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| Headlight beam level control system indicator light does not come on when turning the power switch on (IG). | Indicator circuit | Refer to Indicator Circuit [08/2013 - ] |
| Headlight leveling ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| Combination meter assembly | Refer to REMOVAL [08/2013 - ] | |
| DTC information cannot be detected. | Diagnosis circuit | Refer to Diagnosis Circuit [08/2013 - ] |
| Headlight leveling ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| Initialization cannot be performed. | Check DTCs | Refer to DTC CHECK / CLEAR [08/2013 - ] |
| LVL terminal circuit | Refer to LVL Terminal Circuit [08/2013 - ] | |
| Headlight leveling ECU assembly | Refer to REMOVAL [08/2013 - ] |
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.