DTC B2090 Driving Support System Malfunction: Description

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

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 assembly.

When the driving support ECU detects a malfunction in the dynamic radar cruise control system, and pre-collision system ("PRE-COLLISION 2*1 or Pre-Collision 2*2" part), or detects that the object recognition camera has not been adjusted, the malfunction information is sent to the seat belt control ECU, which outputs this DTC.

When DTC B2090 is detected, other DTCs output by the driving support ECU (dynamic radar cruise control system, PRE-COLLISION 2*1 or Pre-Collision 2*2) are also output.

HINT

*1. for Intelligent tester

*2. for Techstream

HINT

If the object recognition camera is replaced with a new one and the adjustment of the object recognition camera has not been performed, DTC B2090 is output.

DTC TROUBLE DETECTION CONDITION CHART

DTC Code	DTC Detection Condition	Trouble Area
B2090	While initial check is running, power 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 initial beam axis adjustment has not been performed for 1 sec	Driving support system Seat belt control ECU