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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 B2549: Driver Door ECU Communication Stop >> Description

DTC B2549: Driver Door ECU Communication Stop: Description

The sliding roof control ECU assembly receives a driver window position signal from the power window regulator master switch assembly via BEAN communication. The sliding roof control ECU assembly prohibits metaltop system operation when the driver window does not open to the specified position.

DTC No. Detection Condition Trouble Area
B2549 When the engine switch is on (IG), the driver window position signal is interrupted for 5.5 seconds or more.
  • Power window regulator master switch assembly
  • Sliding roof control ECU assembly