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Home >> Lexus >> 2010 >> IS 250C Standard >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B254E: Back Window Panel LH Pulse Sensor Abnormal Operation >> Description

DTC B254E: Back Window Panel LH Pulse Sensor Abnormal Operation: Description

The sliding roof control ECU assembly controls the speed of the back window panel using pulse signals that are generated by the rotation of the sliding roof drive gear assembly LH (back window motor LH).

DTC No. Detection Condition Trouble Area
B254E Pulse signals do not occur during sliding roof drive gear assembly (back window motor LH) operation or pulse signals show abnormal value.
  • Sliding roof drive gear assembly (back window motor LH)
  • Wire harness or connector
  • Sliding roof control ECU assembly