What causes B1790 on a Toyota?

Failed center airbag sensor assembly Communication circuit open or shorted Poor electrical connection Failed occupant classification ECU Low system voltage

How do I fix B1790 on a Toyota?

Disconnect the battery and wait before touching SRS circuits Confirm the code and check the occupant system Inspect and reseat the airbag sensor and ECU connectors Test the communication circuit between the modules Replace the failed module only after tests fail

B1790 Occupant classification ECU loses its link to the airbag sensor

Q: What does B1790 mean on a Toyota?

B1790. Occupant classification ECU loses its link to the airbag sensor. Applies to Toyota, Lexus and Scion models that use this code.

Category: Body
Severity: Airbag Light
Applies to: Toyota, Lexus and Scion models that use this code

What does B1790 mean on a Toyota?

B1790. Occupant classification ECU loses its link to the airbag sensor. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.

Common causes of B1790

Failed center airbag sensor assembly
Communication circuit open or shorted
Poor electrical connection
Failed occupant classification ECU
Low system voltage

How to fix B1790

Disconnect the battery and wait before touching SRS circuits
Confirm the code and check the occupant system
Inspect and reseat the airbag sensor and ECU connectors
Test the communication circuit between the modules
Replace the failed module only after tests fail