B1818 Short to positive in the front passenger side squib second step circuit
What does B1818 mean on a Toyota?
B1818. Short to positive in the front passenger side squib second step circuit. The passenger airbag second stage loop sees battery voltage and the SRS light stays on. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B1818
- Second stage squib wire shorted to power
- Faulty front passenger airbag assembly
- Corroded or loose squib connector
- Failed center airbag sensor assembly
- Harness pinched behind the dash
How to fix B1818
- Disconnect the battery and wait before touching SRS circuits
- Confirm the code with an SRS-capable scan tool
- Inspect and reseat the squib connector
- Test the squib circuit for opens and shorts
- Replace the airbag part only after tests fail