AutoCodesLexus – B0103 Lexus

B0103 Lexus Code - Short To Battery In D Squib Circuit

Quick Answer

The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad. Common causes include Faulty Steering Wheel Pad (D Squib), Steering Wheel Pad (D Squib) harness is open or shorted, Steering Wheel Pad (D Squib) 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
B0103 Lexus indicates Short To Battery In D Squib Circuit.
Common causes
Common causes include Faulty Steering Wheel Pad (D Squib), Steering Wheel Pad (D Squib) harness is open or shorted, Steering Wheel Pad (D Squib) 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 7,695
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code B0103 Lexus Description

The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad. It causes the airbag to deploy when the airbag deployment conditions are satisfied. The Air Bag Control Module monitors the D Squib. The Air Bag Control Module sets the OBDII code when the D Squib is not to factory specifications.
OBDII Code B0103 Lexus - Short To Battery In D Squib Circuit - AutoCodes.com
B0103 Lexus Code - Short To Battery In D Squib Circuit

What are the Possible Causes of the DTC B0103 Lexus?

  • Faulty Steering Wheel Pad (D Squib)
  • Steering Wheel Pad (D Squib) harness is open or shorted
  • Steering Wheel Pad (D Squib) circuit poor electrical connection
  • Faulty Spiral cable
  • Faulty Airbag Sensor Assembly

How to Fix the DTC B0103 Lexus?

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 B0103 Lexus 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 B0103 Lexus code?

Need more information on how to fix the B0103 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0103 Lexus 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.

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 B0103 Lexus Code

1. What are the common symptoms of OBDII code B0103 in a Lexus related to a short to battery in the D squib circuit?

The common symptoms include an illuminated airbag warning light on the dashboard, non-functioning airbag system, and potential issues with the vehicle's safety features.

2. What can cause the OBDII code B0103 in a Lexus indicating a short to battery in the D squib circuit?

Potential causes of this code include damaged wiring in the airbag system, a faulty D squib circuit, a short circuit in the system, or a malfunctioning airbag control module.

3. How can I diagnose the OBDII code B0103 in my Lexus related to a short to battery in the D squib circuit?

Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the airbag system wiring for any visible damage, checking the D squib circuit for continuity, and testing the airbag control module for proper operation.

4. Are there any safety concerns associated with the OBDII code B0103 in a Lexus due to a short to battery in the D squib circuit?

Yes, there are significant safety concerns as the airbag system may not deploy properly in the event of a collision, potentially increasing the risk of injury to the vehicle occupants.

5. Can I drive my Lexus with the OBDII code B0103 indicating a short to battery in the D squib circuit?

It is not recommended to drive the vehicle with this code present, as the airbag system may not function correctly in the event of an accident. Immediate inspection and repair are advised.

6. What are some repair tips for addressing the OBDII code B0103 in a Lexus related to a short to battery in the D squib circuit?

Repair tips include carefully inspecting and repairing any damaged wiring, replacing the faulty D squib circuit, addressing any short circuits, and resetting the airbag control module after repairs are completed.

7. Can I reset the OBDII code B0103 in my Lexus myself after repairing the issue with the D squib circuit?

Yes, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is essential to ensure that the underlying issue has been properly repaired before resetting the code.

8. How much does it typically cost to repair the OBDII code B0103 in a Lexus related to a short to battery in the D squib circuit?

The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to consult a professional mechanic for an accurate estimate.

9. Are there any recalls or technical service bulletins related to the OBDII code B0103 in Lexus vehicles?

It is advisable to check with a Lexus dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to this specific OBDII code in Lexus vehicles.

10. How can I prevent the OBDII code B0103 from recurring in my Lexus after repairs have been made to the D squib circuit?

To prevent the code from recurring, it is essential to ensure that all repairs are performed correctly, conduct regular inspections of the airbag system components, and address any issues promptly to maintain the safety of the vehicle.

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