Seat Belt Reminder Circuit Failure
The seat belt reminder system is not functioning properly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is not getting the right signals from the seat belt switch, so it can't tell if the driver or passenger is buckled up or not.
What the computer is actually seeing
The vehicle's computer expects a voltage signal (typically around 0V when unbuckled and approximately 5V when buckled) from the seat belt switch but is seeing either a constant voltage or an open circuit instead.
What a healthy reading looks like
0V for unbuckled and 5V for buckled; check these at the connector pins of the seat belt switch.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the seat belt wiring and connectors for damage, corrosion, or disconnection. If found, repair or replace as needed.
- 22. With the seat belt disconnected, measure the voltage at the seat belt switch connector. Check for approximately 0V (unbuckled) or 5V (buckled). If not as expected, check for continuity of the wiring to the seat belt module.
- 33. If the wiring is okay, disconnect the seat belt switch and check its resistance. It should show continuity when pressed (buckled) and infinite when released (unbuckled). Replace if faulty.
- 44. If the switch and wiring are good, test or replace the seat belt module.
Common causes
- Faulty seat belt switch
- Open or shorted wiring in the seat belt circuit
- Poor connection at the seat belt module
- Faulty seat belt module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you won’t have a functioning seat belt reminder system.
Will the warning light come back if I clear the code?
It likely will if the underlying issue isn't resolved.
Why does this code show up with other codes?
Often, multiple faults in the seat belt system can trigger multiple codes.
Working a real vehicle right now?
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