B1928 Scion Code - Short To Positive In Rear Pretensioner Squib LH Circuit
Quick Answer
The B1928 diagnostic trouble code for Scion vehicles indicates a "Short to Positive in Rear Pretensioner Squib LH Circuit." This code specifically points to a problem with the left-hand (LH) rear pretensioner squib circuit in the vehicle's supplemental restraint system (SRS), commonly known as the airbag system. Common causes include Wiring harness damage or wear leading to a short circuit, Faulty LH rear pretensioner squib, Corrosion or poor connections in 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
- B1928 Scion indicates Short To Positive In Rear Pretensioner Squib LH Circuit.
- Common causes
- Common causes include Wiring harness damage or wear leading to a short circuit, Faulty LH rear pretensioner squib, Corrosion or poor connections in 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.
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Code B1928 Scion Description
The B1928 diagnostic trouble code for Scion vehicles indicates a "Short to Positive in Rear Pretensioner Squib LH Circuit." This code specifically points to a problem with the left-hand (LH) rear pretensioner squib circuit in the vehicle's supplemental restraint system (SRS), commonly known as the airbag system. The pretensioner squib is a component that helps to tighten the seatbelt in the event of a collision, reducing the risk of injury to the occupants by securely holding them in place.
Common Causes of B1928 Scion
- Wiring harness damage or wear leading to a short circuit.
- Faulty LH rear pretensioner squib.
- Corrosion or poor connections in the circuit.
- Impact or collision that damaged the SRS components.
- Electrical issues such as a blown fuse or relay malfunction.
Symptoms of B1928 Scion
- Illumination of the airbag warning light on the instrument panel.
- Inability to properly tighten the seatbelt during sudden stops or collisions.
- Fault codes related to the SRS system stored in the vehicle's computer.
- Complete failure of the airbag system to deploy in a crash situation.
How to Fix B1928 Scion
- Begin by conducting a thorough visual inspection of the wiring harness and connections in the LH rear pretensioner squib circuit.
- Use a multimeter to test the continuity and resistance of the circuit to identify the location of the short to positive.
- Replace any damaged wiring, connectors, or components in the circuit.
- Clear the fault codes from the vehicle's computer using a diagnostic scanner.
- Perform a test to ensure that the LH rear pretensioner squib is functioning properly and that the airbag warning light is no longer illuminated.
Cost to Fix B1928 Scion
The cost of repairing a B1928 code for a Scion vehicle can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the parts required for this repair, such as wiring harnesses, connectors, or the LH rear pretensioner squib itself, can range from $100 to $500. Labor costs at an auto repair shop can add an additional $100 to $300 to the total bill. It's important to note that diagnosis time and labor rates can vary, so it's advisable to check with local repair 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.
Frequently Asked Questions about B1928 Scion Code
1. What does the OBDII code B1928 mean in a Scion?
Code B1928 indicates a short to positive in the rear pretensioner squib left-hand (LH) circuit, which is part of the airbag system.
2. What are the common symptoms of code B1928 in a Scion?
Symptoms include an illuminated airbag warning light and possible failure of the rear seatbelt pretensioner system to deploy properly in a collision.
3. What causes code B1928 in a Scion?
Common causes include damaged wiring, a short circuit in the pretensioner squib LH circuit, or a faulty seatbelt pretensioner.
4. How can I diagnose code B1928 in a Scion?
Use an OBDII scanner to confirm the code, then visually inspect the wiring and connectors in the rear pretensioner squib LH circuit for damage or signs of a short.
5. Can code B1928 be triggered by a faulty airbag control module?
Yes, a malfunctioning airbag control module can sometimes cause this code, though wiring issues are more common.
6. Is it safe to drive a Scion with code B1928?
While the vehicle may still be drivable, the airbag system may not function properly, posing a safety risk in the event of an accident.
7. How do I fix code B1928 in a Scion?
Repairs may involve replacing damaged wiring, connectors, or the rear seatbelt pretensioner. In some cases, the airbag control module may need servicing or replacement.
8. How expensive is it to repair code B1928 in a Scion?
Costs can vary depending on the specific issue, but repairs generally involve diagnosing and replacing faulty components, which may range from $100 to $500 or more.
9. Can a DIY mechanic fix code B1928 in a Scion?
Skilled DIY mechanics can attempt repairs by inspecting and replacing damaged wiring or components, but working on airbag systems requires caution to avoid accidental deployment.
10. Will clearing the code B1928 fix the problem in a Scion?
Clearing the code will not fix the underlying issue. The problem must be addressed to prevent the code from reappearing.
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