AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM PROBLEM SYMPTOMS TABLE

Note

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

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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.

  • Inspect the fuses related to this system before inspecting the suspected areas below.

Automatic Headlight Beam Level Control System (for Single Beam Headlight)
Symptom Suspected Area Link
Right side auto leveling does not operate (optical axis not controlled) Headlight beam level control actuator circuit

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Headlight ECU sub-assembly RH

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Left side auto leveling does not operate (optical axis not controlled) Headlight beam level control actuator circuit

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Headlight ECU sub-assembly LH

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Automatic Headlight Beam Level Control System (for Triple Beam Headlight)
Symptom Suspected Area Link
Right side auto leveling does not operate (optical axis not controlled) Headlight leveling motor RH

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Headlight unit assembly RH

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Headlight ECU sub-assembly RH

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Left side auto leveling does not operate (optical axis not controlled) Headlight leveling motor LH

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Headlight unit assembly LH

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Headlight ECU sub-assembly LH

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