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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 B2546: Combination Meter ECU Communication Stop >> Description

DTC B2546: Combination Meter ECU Communication Stop: Description

The sliding roof control ECU assembly receives vehicle speed signal via BEAN communication from the combination meter assembly and changes operation permission condition of the metaltop system.

DTC No. Detection Condition Trouble Area
B2546 When the engine switch is on (IG), the vehicle speed signal is interrupted for 5.5 seconds or more.
  • Combination meter assembly
  • Sliding roof control ECU assembly