Open In Left Side Lower MOS
Table of contents
B2021 TOYOTA Possible Causes
- Faulty Seat Belt Control ECU
- Seat Belt Control ECU harness is open or shorted
- Seat Belt Control ECU circuit poor electrical connection
How do I fix code B2021 TOYOTA?
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 B2021 TOYOTA code
The cost of diagnosing the B2021 TOYOTA 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
B2021 TOYOTA Description
The Seat Belt Control ECU receives information from the master cylinder solenoid (Skid Control ECU) via the Controlled Are Network (CAN) communication line and tightens the seat belt by operating the motor in the Front Seat Outer Belt Assembly Right (RH) or Left (LH). The Seat Belt Control ECU sets the OBDII code if there is an open in Left Side Lower MOS.