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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 B2557: Motor Lock in Roof Drive Motor(LH) >> Description

DTC B2557: Motor Lock in Roof Drive Motor(LH): Description

The sliding roof control ECU assembly operates the roof panels, luggage door, back window panel and package trays in the specified order while the sliding roof switch assembly is operated. The sliding roof drive gear assembly LH (roof motor LH) operates the roof panel while adjusting the speed of the right and left side motors.

DTC No. Detection Condition Trouble Area
B2557 Excessive current flow in the sliding roof drive gear assembly LH (roof motor LH) circuit.
  • Sliding roof drive gear assembly LH (roof motor LH)
  • Sliding roof control ECU assembly