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Home >> Lexus >> 2015 >> RX 350 Base, FWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC B2090: Driving Support System Malfunction [03/2014 - ] >> Description
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DTC B2090: Driving Support System Malfunction [03/2014 - ]: Description

The seat belt control ECU receives collision information from the driving support ECU and skid control ECU via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt.

When the driving support ECU detects a malfunction in the dynamic radar cruise control system and pre-collision system, the malfunction information is sent to the seat belt control ECU, which outputs this DTC.

When DTC B2090 is detected, other DTCs are also stored by the driving support ECU (dynamic radar cruise control system and pre-collision system).

DTC No. DTC Detection Condition Trouble Area
B2090 While initial check is running, engine switch is on (IG) and pre-collision system is operating, malfunction is detected in any one system of driving support system, or object recognition camera sensor initial beam axis adjustment has not been performed for 1 second.
  • Driving support system
  • Seat belt control ECU