AutoCodesRAM – B1B53 RAM

B1B53 RAM Code - 1st Row Driver Seat Belt Sensor Circuit Shorted Together

Quick Answer

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Driver Seat Belt Buckle Switch circuits every 100 ms 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
B1B53 RAM indicates 1st Row Driver Seat Belt Sensor Circuit Shorted Together.
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.
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Code Popularity 543
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 21, 2019
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Code B1B53 RAM Description

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Driver Seat Belt Buckle Switch circuits every 100 ms to verify the integrity of the switch and wiring. The DTC will set if the circuits are shorted together for 2.5 seconds and the code will transitions from active to stored when the current returns to normal range for five seconds. 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. The ORC monitors the status of the seat belt switch circuits at power up and every 100 ms thereafter while the ignition is in on.
OBDII Code B1B53 RAM - 1st Row Driver Seat Belt Sensor Circuit Shorted Together - AutoCodes.com
B1B53 RAM Code - 1st Row Driver Seat Belt Sensor Circuit Shorted Together

What are the Possible Causes of the DTC B1B53 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 B1B53 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 B1B53 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 B1B53 RAM code?

Need more information on how to fix the B1B53 RAM code? Get Access to Factory Service Manuals

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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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1B53 RAM Code

What does OBDII code B1B53 mean?

1. Code B1B53 indicates a problem with the first-row driver seat belt sensor circuit, specifically that the circuit is shorted together. 2.

What are the common symptoms of code B1B53?

Common symptoms include the seat belt warning light staying on, malfunctioning seat belt chime, or improper airbag deployment readiness. 3.

What causes the B1B53 code to appear?

The code is usually caused by damaged wiring, a faulty seat belt buckle sensor, corroded connectors, or a short circuit in the seat belt sensor circuit. 4.

Can a faulty seat belt buckle trigger code B1B53?

Yes, a defective seat belt buckle sensor can cause the circuit to short together and trigger this code. 5.

How do I diagnose code B1B53?

Diagnose this code by checking the seat belt sensor wiring for damage, testing the seat belt buckle sensor, and inspecting the connectors for corrosion or loose connections. 6.

Can I drive with code B1B53 active?

Driving is possible, but it is not recommended, as the issue could affect airbag functionality and overall safety in the event of a collision. 7.

How do I fix code B1B53?

To fix the code, repair or replace damaged wiring, clean or replace corroded connectors, and replace the faulty seat belt buckle sensor if needed. 8.

Will clearing the code fix the problem?

Clearing the code may temporarily remove the warning, but if the underlying issue is not addressed, the code will likely return. 9.

How much does it cost to repair code B1B53?

The repair cost depends on the specific issue but typically ranges from $50 to $300, depending on whether you're repairing wiring or replacing the seat belt sensor. 10.

Does code B1B53 affect airbag deployment?

Yes, since the seat belt sensor is linked to the airbag system, this code may impact the airbag’s ability to deploy correctly during an accident.

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