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Home >> Lexus >> 2015 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Automatic Headlight Beam Level Control System (Single Beam Headlight) - Diagnostics - Introduction >> AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (for Single Beam Headlight) >> Problem Symptoms Table [09/2014 - 11/2017] >> Problem Symptoms Table [09/2014 - 11/2017]

Problem Symptoms Table [09/2014 - 11/2017]

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.

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 [09/2014 - 10/2018] 
Check fail-safe function Refer to FAIL-SAFE CHART [09/2014 - 11/2017] 
Headlight leveling ECU power source circuit Refer to Headlight Leveling ECU Power Source Circuit [09/2014 - 10/2018]
Headlight beam level control actuator circuit Refer to Headlight Beam Level Control Actuator Circuit [09/2014 - 10/2018]
Headlight leveling ECU assembly Refer to REMOVAL [09/2014 - 10/2018]
Initialization cannot be performed Check DTCs Refer to DTC CHECK / CLEAR [09/2014 - 10/2018] 
CAN communication system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017]
Headlight leveling ECU assembly Refer to REMOVAL [09/2014 - 10/2018]
Headlight leveling warning light does not come on when turning the engine switch on (IG) Headlight leveling ECU assembly Refer to REMOVAL [09/2014 - 10/2018]
Combination meter assembly Refer to REMOVAL [09/2014 - ]