Rear Impact Airbag Deployment Circuit Open
There’s an issue with the airbag deployment circuit for the rear impact sensors.
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 trying to check if the airbags can deploy, but it's not getting the right signal from the rear impact sensor circuit, meaning potential safety issues in a crash.
What the computer is actually seeing
The airbag control module detects an open circuit on the deployment line for the rear impact sensor. Ideally, this circuit should show continuity under normal conditions when the vehicle is in use.
What a healthy reading looks like
Resistance should be less than 5 ohms and voltage at the airbag module connector should be close to battery voltage (12-14 volts, depending on battery state).
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 wiring and connectors for damage, pinched wires, or corrosion. Check T1 and T2 pins at the airbag control module for continuity.
- 22. Use a multimeter to measure resistance across the airbag deployment circuit wiring. You should see less than 5 ohms. If higher, repair or replace faulty wiring.
- 33. Check the operation of the rear impact sensor by testing its resistance. Refer to the service manual for specific resistance values. Replace if out of spec.
- 44. Clear the fault code and perform a vehicle function test to see if the code returns.
Common causes
- Damaged wiring or connectors in the airbag circuit
- Faulty rear impact sensor
- Corrosion at connectors or ground points
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's moderately serious; the airbag may not deploy in a rear-end collision. Fixit as soon as possible.
Will this code come back after clearing?
If the underlying issue isn't fixed (like faulty wiring or a bad sensor), yes, it will return.
Why does this code pair with other airbag codes?
Airbag systems are interconnected, so issues with one sensor can trigger codes for others.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →