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Home >> Toyota >> 2021 >> C-HR Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Lighting System - Diagnostic Codes & Circuit Tests) >> Lighting System >> DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [10/2017 - 09/2019] >> Description

DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [10/2017 - 09/2019]: Description

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A DTC is stored when the headlight ECU sub-assembly receives a light source malfunction signal from its respective headlight unit. The headlight ECU sub-assembly LH stores DTC B2439 or B243A.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2439 Headlamp LH Circuit headlight ECU sub-assembly LH light source malfunction
  • Headlight unit assembly LH
  • Headlight ECU sub-assembly LH
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B243A Headlamp RH Circuit headlight ECU sub-assembly RH light source malfunction
  • Headlight unit assembly RH
  • Headlight ECU sub-assembly RH
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