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Engine-Codes – Scion – B0137 Scion

B0137 Scion Code - Short To Ground Left Seat Belt Pretensioner Squib Circuit

Quick Answer

The B0137 Scion code indicates a problem with the left seat belt pretensioner squib circuit, specifically a short to ground. Common causes include Wiring harness damage or wear, Corrosion in the seat belt pretensioner squib circuit, Faulty seat belt pretensioner squib. 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
B0137 Scion indicates Short To Ground Left Seat Belt Pretensioner Squib Circuit.
Common causes
Common causes include Wiring harness damage or wear, Corrosion in the seat belt pretensioner squib circuit, Faulty seat belt pretensioner squib.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B0137 Scion Description

The B0137 Scion code indicates a problem with the left seat belt pretensioner squib circuit, specifically a short to ground. The seat belt pretensioner is a safety feature designed to tighten the seat belt in the event of a collision, reducing the forward movement of the occupant and minimizing the risk of injury. The squib circuit is responsible for deploying the pretensioner in a controlled manner. A short to ground in this circuit means that there is an unintended connection between the circuit and the vehicle's chassis or ground, which can prevent the pretensioner from functioning properly.

OBDII Code B0137 Scion - Short To Ground Left Seat Belt Pretensioner Squib Circuit
B0137 Scion Code - Short To Ground Left Seat Belt Pretensioner Squib Circuit

Common Causes of B0137 Scion

  1. Wiring harness damage or wear.
  2. Corrosion in the seat belt pretensioner squib circuit.
  3. Faulty seat belt pretensioner squib.
  4. Loose or corroded electrical connections.
  5. Impact or collision causing damage to the seat belt pretensioner system.

Symptoms of B0137 Scion

  1. Airbag warning light illuminated on the dashboard.
  2. Seat belt pretensioner not activating during a collision.
  3. Faulty seat belt retracting mechanism.
  4. Audible clicking or buzzing noise from the seat belt pretensioner area.
  5. Increased slack in the seat belt during sudden stops or impacts.

How to Fix B0137 Scion

  1. Begin by disconnecting the vehicle's battery to prevent any electrical mishaps.
  2. Inspect the wiring harness for any visible damage, corrosion, or wear. Repair or replace any damaged wires.
  3. Check the seat belt pretensioner squib for proper functionality. Replace if necessary.
  4. Test the electrical connections for tightness and corrosion. Clean or tighten connections as needed.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test the seat belt pretensioner system to ensure proper operation.

Cost to Fix B0137 Scion

The cost of repairing a short to ground in the left seat belt pretensioner squib circuit can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get a more accurate estimate for your specific vehicle.

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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 B0137 Scion Code

1. What does the OBDII code B0137 indicate on a Scion?

The code B0137 indicates a fault in the left seat belt pretensioner squib circuit, specifically pointing to a short to ground.

2. What symptoms might I notice if my Scion has the B0137 code?

You may see the SRS (airbag) warning light illuminated on the dashboard. In some cases, there might be no obvious physical symptoms, although the pretensioner might not deploy in the event of an accident.

3. What are the common causes of the B0137 code in a Scion?

Common causes include damaged wiring or connectors in the left seat belt pretensioner circuit, a faulty left seat belt pretensioner, or issues with the airbag control module.

4. How is the B0137 code diagnosed in a Scion?

Diagnosis involves using a scan tool to read the fault code, visually inspecting the wiring and connectors for damage, and testing the left seat belt pretensioner and associated circuits for continuity and resistance.

5. What are the steps to repair the B0137 code on a Scion?

Repair steps typically include repairing or replacing any damaged wiring or connectors, replacing the left seat belt pretensioner if it is defective, and possibly replacing or reprogramming the airbag control module if it is faulty.

6. Is it safe to drive my Scion with the B0137 code?

While the vehicle may operate normally, safety is compromised as the seat belt pretensioner might not function properly in an accident. It is advisable to address this issue as soon as possible.

7. Can I fix the B0137 code on my Scion by myself?

If you have experience in automotive electrical systems, you might be able to attempt the repair. However, due to the involvement of the safety restraint system, it is recommended to have a professional technician handle it.

8. How urgent is it to fix a B0137 code on a Scion?

It is quite urgent to address this issue because it involves a critical safety component of your vehicle. Delaying repairs can put passengers at risk in the event of a collision.

9. What tools are necessary to diagnose the B0137 code on a Scion?

Tools needed include a scan tool capable of reading SRS codes, a multimeter for electrical testing, and possibly a wiring diagram for tracing and inspecting the circuit involved.

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