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Engine-Codes – Scion – B19A5 Scion

B19A5 Scion Code - Short In Front Active Headrest Squib LH Circuit

Quick Answer

The B19A5 diagnostic trouble code (DTC) for Scion vehicles indicates a short in the front active headrest squib LH circuit. Common causes include Damaged wiring in the front active headrest squib LH circuit, Faulty front active headrest squib, Corrosion or poor connection in the connectors associated with the circuit. 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
B19A5 Scion indicates Short In Front Active Headrest Squib LH Circuit.
Common causes
Common causes include Damaged wiring in the front active headrest squib LH circuit, Faulty front active headrest squib, Corrosion or poor connection in the connectors associated with the circuit.
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 13, 2024
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Code B19A5 Scion Description

The B19A5 diagnostic trouble code (DTC) for Scion vehicles indicates a short in the front active headrest squib LH circuit. The active headrest system is designed to provide additional protection in the event of a rear-end collision by moving the headrest forward to reduce the risk of whiplash. The squib is a component within the system that is responsible for deploying the headrest in response to a collision.

OBDII Code B19A5 Scion - Short In Front Active Headrest Squib LH Circuit
B19A5 Scion Code - Short In Front Active Headrest Squib LH Circuit

Common Causes of B19A5 Scion

  1. Damaged wiring in the front active headrest squib LH circuit.
  2. Faulty front active headrest squib.
  3. Corrosion or poor connection in the connectors associated with the circuit.
  4. Impact or collision that damaged the active headrest system components.
  5. Manufacturing defect in the squib or wiring.

Symptoms of B19A5 Scion

  1. Airbag warning light illuminated on the dashboard.
  2. Inability of the active headrest system to deploy during a rear-end collision.
  3. Loss of functionality of the active headrest system.
  4. Possible fault codes related to the supplemental restraint system stored in the vehicle's computer.

How to Fix B19A5 Scion

  1. Begin by diagnosing the specific cause of the short circuit, using a scan tool to retrieve the DTC and inspecting the wiring and connectors for damage.
  2. Replace any damaged wiring or connectors in the front active headrest squib LH circuit.
  3. If the squib is found to be faulty, replace it with a new component.
  4. Clear the DTC from the vehicle's computer using a scan tool and perform a test to ensure that the active headrest system functions properly.
  5. Reset the airbag warning light on the dashboard if it was illuminated due to the B19A5 code.

Cost to Fix B19A5 Scion

The cost of repairing a short in the front active headrest squib LH circuit can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of replacing damaged wiring or connectors may range from $100 to $300, while replacing the squib can cost between $200 and $500. The total repair cost, including diagnosis time and labor, can range from $300 to $800. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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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 B19A5 Scion Code

1. What does the OBDII code B19A5 mean on a Scion?

The B19A5 code indicates a short circuit in the Front Active Headrest Squib LH (left-hand) circuit, which is part of the airbag system.

2. What are the common symptoms of the B19A5 code?

Common symptoms include an illuminated airbag warning light on the dashboard and potential deactivation of the airbag system.

3. What causes the B19A5 code to appear?

This code is typically caused by damaged wiring, a short circuit, a faulty left-hand front active headrest squib, or a malfunctioning airbag control module.

4. Is the B19A5 code serious?

Yes, it is serious because it involves the airbag system, which may not function properly in the event of a collision.

5. Can I drive my Scion with the B19A5 code?

While the vehicle may still be drivable, it is not safe because the airbag system could fail to deploy during an accident.

6. How do I diagnose the B19A5 code?

Diagnosis typically involves inspecting the wiring and connectors for damage or corrosion, testing the squib with a multimeter, and checking for faults in the airbag control module.

7. How can I fix the B19A5 code on my Scion?

Repairs may include replacing damaged wiring, repairing connectors, or replacing the faulty left-hand front active headrest squib or airbag control module.

8. How much does it cost to fix the B19A5 code?

Repair costs vary depending on the issue, but they can range from $100 for simple wiring repairs to over $1,000 if parts like the squib or airbag module need replacement.

9. What tools are needed to address the B19A5 code?

Basic tools include a diagnostic scanner, multimeter, and possibly wire repair kits. Advanced repairs may require specialized airbag system tools.

10. Can I fix the B19A5 code myself?

If you have experience working with automotive electrical systems and airbag components, you may be able to fix it. However, due to the safety risks, it’s recommended to have a professional handle airbag-related repairs.

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