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Home >> Lexus >> 2010 >> IS 350C >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B255A: Lost Communication with Clearance Sonar ECU >> Description

DTC B255A: Lost Communication with Clearance Sonar ECU: Description

The sliding roof control ECU assembly receives information about obstacles around the vehicle from the clearance warning ECU assembly (clearance sonar ECU) via BEAN communication. The sliding roof control ECU assembly changes the operation permission status of the metaltop system based on this information.

DTC No. Detection Condition Trouble Area
B255A When the engine switch is on (IG), the information about obstacles around the vehicle is interrupted for 16.5 seconds or more.
  • Clearance warning ECU assembly (clearance sonar ECU)
  • Sliding roof control ECU assembly