Driving Support System Malfunction
Table of contents
B2090 Possible Causes
- Faulty Seat Belt Control ECU
- Seat Belt Control ECU harness is open or shorted
- Seat Belt Control ECU circuit poor electrical connection
- Faulty Driving Support ECU
How do I fix code B2090?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B2090 code
The cost of diagnosing the B2090 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Air Bag Warning Light ON
B2090 Description
The Seat Belt Control ECU receives collision information from the Driving Support ECU and brake booster with master cylinder (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 Diagnostic Trouble Code (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). Also, if the lane recognition camera sensor assembly beam axis adjustment is not performed after installing the lane recognition camera sensor assembly, DTC B2090 is stored.