Driver Side Door ECU Communication Stop
Table of contents
B2321 TOYOTA Possible Causes
- Faulty Front Power Window Regulator Motor Assembly Left (LH)
- Front Power Window Regulator Motor Assembly Left harness is open or shorted
- Front Power Window Regulator Motor Assembly Left circuit poor electrical connection
- Faulty Main Body ECU (Instrument Panel Junction Block Assembly)
How do I fix code B2321 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 B2321 TOYOTA code
The cost of diagnosing the B2321 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
- Engine Light ON (or Service Engine Soon Warning Light)
B2321 TOYOTA Description
This Diagnostic Trouble Code (DTC) is output when LIN communication between the Front Power Window Regulator Motor Assembly Left (LH) and Main Body ECU (Instrument Panel Junction Block Assembly) stops for more than 10 seconds.