What it means
The restraint module monitors the deployment circuit for the second-row right inflatable seatbelt. It sets this code when the circuit’s measured electrical characteristics are outside the expected range.
At a glance
- Usually lights the airbag (SRS) or body-system warning light
How it works
The restraint control module monitors the deployment circuit for the second-row right inflatable seatbelt, which is designed to widen its webbing during a crash. B00F4 means the circuit’s electrical reading is outside the expected range, potentially preventing the right-side belt inflator from operating.
Common causes
Most likely first.
- Open or short in inflatable belt deployment circuit
- Damaged wiring or connector
- Failed belt inflator
- Fault in the restraint control module
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
How to diagnose it
- Confirm B00F4 with a restraint-capable scan tool, check for related restraint codes, and save freeze-frame details before clearing anything.
- Inspect the second-row right inflatable belt and nearby trim for impact damage, moisture, or evidence of recent interior work.
- Disable the restraint system as directed by the manufacturer, then inspect the right belt deployment connector and harness for loose or corroded terminals, pin damage, and chafing.
- Use the approved procedure to test the second-row right deployment circuit for an open or short; do not probe the inflator directly with standard electrical tools.
- If wiring checks are satisfactory, follow the maker’s diagnostic sequence to assess the right belt assembly and restraint control module.
Common fixes
- Repair damaged wiring or restore a loose connection in the second-row right deployment circuit using the approved method.
- Replace a damaged connector or harness section identified during circuit inspection.
- Replace the second-row right inflatable belt assembly if testing confirms an inflator failure.
- Repair or replace the restraint control module if testing confirms it is defective.
Can I keep driving?
The second-row right inflatable belt may not widen as designed in a collision, and occupant protection may be reduced. Avoid relying on that seat until repaired, and keep clear of the inflator during diagnosis or service.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.