Engine-Codes - Fiat - B1B51 Fiat

B1B51 Fiat Code - 1st Row Driver Seat Belt Sensor Circuit High

- Code Popularity: 475 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1B51 Fiat?

  • 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 B1B51 Fiat Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code B1B51 Fiat?

Labor: 1.0

The cost to diagnose the B1B51 Fiat code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Fiat have Safety Recalls? → Check here

|When is the B1B51 Fiat Code Detected?

SHORT TO VOLTAGE: If the Occupant Restraint Controller (ORC) detects a short to voltage on the Driver Seat Belt Buckle Switch circuits for 2.5 seconds. The active code will change to stored after the ORC verifies the seat belt switch sense circuit voltage has returned to normal voltage range for five seconds. OPEN: If the ORC detects the driver seat belt buckle switch circuits have been open for 2.5 seconds. The active code will change to stored after the ORC verifies the driver seat belt buckle switch sense circuit voltage has returned to normal voltage range for five seconds.

|What are Code B1B51 Fiat Possible Symptoms?

  • Air Bag Warning Light ON

|What Does the B1B51 Fiat Code Mean?

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Driver Seat Belt Buckle Switch circuits every 100ms to verify the integrity of the switch and wiring. The front seat belt switches cannot be adjusted or repaired and, if ineffective or damaged, the entire front seat belt buckle-half unit must be replaced. The airbag warning lamp will display in the instrument cluster for this fault. With the ignition on and the Occupant Restraint Controller (ORC) configured for a Driver Seat Belt Buckle Switch. The ORC monitors the switch input current ranges at power up and continuously every 100ms.

B1B51 Fiat Code - 1st Row Driver Seat Belt Sensor Circuit High

|Need more Information on the B1B51 Fiat Code?

Need more information on how to fix the B1B51 Fiat code? Get Access to Factory Service Manuals

|Need Help with the B1B51 Fiat Code?

Get the B1B51 Fiat code diagnosed by a professional: Find a repair shop in your area

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.