B1100 Malfunction in the center airbag sensor assembly. The unit fails its self test or cannot judge the SRS state

What does B1100 mean on a Toyota?

B1100. Malfunction in the center airbag sensor assembly. The unit fails its self test or cannot judge the SRS state. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.

Common causes of B1100

• Internal fault in the center airbag sensor assembly
• Low system voltage during the self test
• Poor ground at the airbag sensor assembly
• Corroded or loose airbag sensor assembly connector
• Damaged wiring to the airbag sensor assembly

How to fix B1100

1. Disconnect the battery and wait before touching SRS wiring
2. Confirm the code with an SRS-capable scanner and read freeze frame
3. Check battery voltage and charging system output
4. Inspect and reseat the airbag sensor assembly connectors
5. Replace the center airbag sensor assembly if the fault repeats after voltage checks