B1656 Left seat belt buckle switch circuit reads a fault
What does B1656 mean on a Toyota?
B1656. Left seat belt buckle switch circuit reads a fault. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B1656
- Failed left front seat inner belt
- Seat belt buckle switch harness open or shorted
- Poor electrical connection
- Failed center airbag sensor assembly
- Low system voltage
How to fix B1656
- Disconnect the battery and wait before touching SRS circuits
- Confirm the code and check the seat belt buckle
- Inspect and reseat the buckle switch connectors
- Test the buckle switch circuit
- Replace the buckle assembly only after tests fail