B1902 Lexus Code - Short to Ground in Front Pretensioner Squib Right Circuit
Quick Answer
The Front Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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
- B1902 Lexus indicates Short to Ground in Front Pretensioner Squib Right Circuit.
- Common causes
- Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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.
Code B1902 Lexus Description
What are the Possible Causes of the DTC B1902 Lexus?
- Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right)
- Front Seat Outer Belt Assembly Right harness is open or shorted
- Front Seat Outer Belt Assembly Right circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1902 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 B1902 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.
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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.
Frequently Asked Questions about B1902 Lexus Code
1. What are the common symptoms of OBDII code B1902 in a Lexus related to the Front Pretensioner Squib Right Circuit?
- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the front right seatbelt pretensioner system.
2. What does "Short to Ground in Front Pretensioner Squib Right Circuit" mean in relation to OBDII code B1902 for a Lexus?
- This indicates there is an electrical short circuit in the wiring of the front right seatbelt pretensioner system, which can affect its proper operation.
3. What are the possible causes of OBDII code B1902 in a Lexus, signaling a Short to Ground in Front Pretensioner Squib Right Circuit?
- Causes may include damaged wiring, a faulty pretensioner squib, poor connections, or issues with the airbag control module.
4. How can I diagnose OBDII code B1902 in a Lexus with a Short to Ground in Front Pretensioner Squib Right Circuit?
- Diagnosis typically involves inspecting the wiring harness, connectors, and components in the front right seatbelt pretensioner system for any visible damage or faults.
5. Can I repair OBDII code B1902 related to the Front Pretensioner Squib Right Circuit issue in my Lexus at home?
- While basic inspections like checking connections and wiring can be done at home, repairing the issue may require specialized tools and expertise, so it's recommended to consult a professional.
6. Is it safe to drive my Lexus with OBDII code B1902 triggered by a Short to Ground in Front Pretensioner Squib Right Circuit?
- It is not recommended to drive the vehicle with this code active, as it may compromise the functionality of the front right seatbelt pretensioner system, affecting occupant safety in the event of a collision.
7. How much does it typically cost to repair OBDII code B1902 in a Lexus due to a Short to Ground in Front Pretensioner Squib Right Circuit?
- Repair costs can vary depending on the extent of the damage and the specific components needing replacement, but it's advisable to consult a professional for an accurate estimate.
8. Will resetting the OBDII code B1902 in my Lexus resolve the issue related to the Front Pretensioner Squib Right Circuit?
- Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the Short to Ground issue. It's essential to address the root cause of the fault.
9. Can a DIY enthusiast with some automotive experience tackle the repair for OBDII code B1902 in a Lexus on their own?
- While some basic troubleshooting steps can be DIY-friendly, dealing with airbag systems and electrical circuits requires specialized knowledge and tools, making it best left to professionals.
10. How can I prevent OBDII code B1902 from reoccurring in my Lexus after repairing the Short to Ground in Front Pretensioner Squib Right Circuit issue?
- Ensuring proper installation of components, regular maintenance checks on the airbag system, and addressing any wiring issues promptly can help prevent the code from reoccurring.
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