Communication Interruption
Table of contents
B2621 TOYOTA Possible Causes
- Faulty Multiplex Tilt and Telescopic ECU
- Multiplex Tilt and Telescopic ECU harness is open or shorted
- Multiplex Tilt and Telescopic ECU circuit poor electrical connection
How do I fix code B2621 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 B2621 TOYOTA code
The cost of diagnosing the B2621 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)
B2621 TOYOTA Description
The Multiplex Tilt and Telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that it is connected to the network by outputting a specified signal (periodic signal) to the communication bus on a regular schedule. The Multiplex Tilt and Telescopic ECU detects the connection of each ECU based on the signal. The Diagnostic Trouble Code (DTC) sets when the periodic signal from a specified ECU has stopped.