Toyota CH-R Service Manual: Problem Symptoms Table



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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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


Suspected Area


Automatic headlight beam level control system does not operate (Left Headlight)

Headlight Unit Assembly LH*1

Headlight Unit Assembly LH*2

Headlight ECU sub-assembly LH

Automatic headlight beam level control system does not operate (Right Headlight)

Headlight Unit Assembly RH*1

Headlight Unit Assembly RH*2

Headlight ECU sub-assembly RH

Initialization cannot be performed

CAN communication system

Headlight ECU sub-assembly LH

  • *1: for Halogen Headlight
  • *2: for LED Headlight
    INITIALIZATION NOTICE: The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced du ...

    Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION (a) Automatic headlight beam level control system data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the ...

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