B1B50 RAM Code - 1st Row Driver Seat Belt Sensor Circuit Low
Quick Answer
When powered, the Occupant Restraint Controller (ORC) sends a test current across the Driver Seat Belt Switch circuits every 100ms to verify the integrity of the switch and wiring. Common causes include Faulty Driver Seat Belt Buckle Switch, Driver Seat Belt Buckle Switch harness is open or shorted, Driver Seat Belt Buckle Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1B50 RAM indicates 1st Row Driver Seat Belt Sensor Circuit Low.
- Common causes
- Common causes include Faulty Driver Seat Belt Buckle Switch, Driver Seat Belt Buckle Switch harness is open or shorted, Driver Seat Belt Buckle Switch circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B1B50 RAM Description
What are the Possible Causes of the DTC B1B50 RAM?
- Faulty Driver Seat Belt Buckle Switch
- Driver Seat Belt Buckle Switch harness is open or shorted
- Driver Seat Belt Buckle Switch circuit poor electrical connection
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC B1B50 RAM?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1B50 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B1B50 RAM code?
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B1B50 RAM Code
1. What does the OBDII code B1B50 mean?
B1B50 indicates a problem with the 1st Row Driver Seat Belt Sensor Circuit, specifically a low voltage or electrical fault in the circuit.
2. What are the symptoms of code B1B50?
Common symptoms include the airbag warning light being illuminated, the seat belt warning light staying on, or the seat belt chime not functioning properly.
3. What causes the B1B50 code to appear?
Possible causes include a faulty seat belt sensor, damaged wiring or connectors, a short circuit, or a failed control module.
4. Can I drive my vehicle with the B1B50 code?
While the vehicle may still be drivable, the airbag system may not function correctly, posing a safety risk. It’s best to diagnose and fix the issue promptly.
5. How do I diagnose the B1B50 code?
Start by inspecting the seat belt sensor wiring and connectors for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.
6. How do I fix the B1B50 code?
Repairs may include replacing the seat belt sensor, repairing or replacing damaged wiring, or, in rare cases, replacing the control module.
7. Can a dead battery cause the B1B50 code?
Yes, a low or dead battery can sometimes cause voltage-related errors, including the B1B50 code. Ensure the battery is fully charged and functioning properly.
8. Is the B1B50 code covered under warranty?
This depends on your vehicle’s warranty coverage. Check with your dealer to see if seat belt-related repairs are covered.
9. How much does it cost to fix the B1B50 code?
Repair costs can vary but typically range from $100 to $300 for diagnostics and repairs, depending on whether parts like the seat belt sensor need replacement.
10. Will clearing the code with an OBDII scanner fix the problem?
Clearing the code may turn off the warning lights temporarily, but it won’t address the underlying issue. Proper diagnosis and repair are required.
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