Rear Left Seat Belt Reminder Signal
Indicates a fault in the rear left seat belt reminder system.
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 receiving the correct signal from the sensor that tells it whether the rear left seat belt is buckled or not.
What the computer is actually seeing
The system expects a voltage signal around 0.5V when the seat belt is unbuckled and around 4.5V when it is buckled. If it reads a different voltage or no signal at all for a specified time frame, it sets this code.
What a healthy reading looks like
0.5V unbuckled, 4.5V buckled, signal must stabilize within 100 milliseconds after the seat is occupied.
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 rear left seat belt connector for corrosion or damage. Repair or replace as necessary. Decision: If fixed, clear codes and retest; if not, proceed to step 2.
- 22. Check the wiring between the seat belt sensor and the body control module for shorts or breaks. Use a multimeter to test for continuity. Decision: If wiring is good, proceed to step 3; if not, repair wiring as needed.
- 33. Test the seat belt sensor output using a scan tool to confirm voltage levels. Ensure it matches expected values (0.5V unbuckled, 4.5V buckled). Decision: If voltage is correct, proceed to step 4; if not, replace the seat belt sensor.
- 44. If all else fails, check the functionality of the body control module for proper operation. Decision: Replace the body control module if no other causes are found.
Common causes
- Faulty seat belt sensor
- Wiring issue or short to ground
- Connector corrosion or damage
- Faulty body control module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code active?
Yes, but it's recommended to fix it soon, as it can indicate a safety issue for passengers.
Will this code come back after clearing it?
It may come back if the underlying issue is not resolved.
Why does this code show up with another code?
Multiple codes can indicate cascading failures in related systems, such as seat belt reminders and other safety features.
Working a real vehicle right now?
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