B1187 Lexus Code - Short To Ground In Passenger Side Air Bag Module Second Stage Squib Circuit
Quick Answer
The B1187 diagnostic trouble code for Lexus vehicles indicates a short to ground in the passenger side airbag module second stage squib circuit. Common causes include Damaged wiring harness leading to the passenger side airbag module, Faulty passenger side airbag module, Defective second stage squib 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
- B1187 Lexus indicates Short To Ground In Passenger Side Air Bag Module Second Stage Squib Circuit.
- Common causes
- Common causes include Damaged wiring harness leading to the passenger side airbag module, Faulty passenger side airbag module, Defective second stage squib 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 B1187 Lexus Description
The B1187 diagnostic trouble code for Lexus vehicles indicates a short to ground in the passenger side airbag module second stage squib circuit. This means that there is an electrical issue in the circuit that controls the deployment of the passenger side airbag in the event of a collision. The second stage squib is responsible for igniting the airbag inflator to deploy the airbag at the appropriate time.
Common Causes of B1187 Lexus
- Damaged wiring harness leading to the passenger side airbag module.
- Faulty passenger side airbag module.
- Defective second stage squib circuit.
- Poor electrical connection in the airbag system.
- Impact or collision that may have damaged the airbag system components.
Symptoms of B1187 Lexus
- Airbag warning light illuminated on the dashboard.
- Inability to turn off the passenger side airbag.
- Intermittent or non-deployment of the passenger side airbag.
- Diagnostic trouble code B1187 stored in the vehicle's computer system.
How to Fix B1187 Lexus
- Begin by disconnecting the vehicle's battery to prevent accidental deployment of the airbag system.
- Inspect the wiring harness for any visible damage or signs of wear. Repair or replace any damaged wires.
- Check the passenger side airbag module and the second stage squib circuit for faults. Replace any faulty components.
- Clear the diagnostic trouble code from the vehicle's computer system using a scan tool.
- Reconnect the battery and test the airbag system to ensure proper functionality.
Cost to Fix B1187 Lexus
The cost of repairing a short to ground in the passenger side airbag module second stage 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 $600, including parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to obtain quotes from multiple sources to get an 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 B1187 Lexus Code
1. What are common symptoms of OBDII code B1187 in a Lexus related to a short to ground in the passenger side air bag module second stage squib circuit?
The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the passenger side airbag deployment system.
2. What are some possible causes of the B1187 OBDII code in a Lexus indicating a short to ground in the air bag circuit?
Possible causes may include damaged wiring or connectors in the passenger side air bag system, a faulty air bag module, or a short circuit in the second stage squib circuit.
3. How can I diagnose the B1187 OBDII code in my Lexus related to a short to ground in the passenger side air bag circuit?
Diagnosing this issue typically involves using a diagnostic scanner to read the fault code, inspecting the wiring and connectors for damage, and testing the components in the passenger side air bag system.
4. Is it safe to drive my Lexus with the B1187 OBDII code indicating a short to ground in the passenger side air bag circuit?
It is not recommended to drive the vehicle with this fault code present, as it may affect the proper function of the passenger side airbag in the event of a collision.
5. Can I repair the short to ground issue in the passenger side air bag circuit myself?
Repairing this issue may require advanced knowledge and special tools, so it is recommended to seek assistance from a professional mechanic or dealership to properly diagnose and repair the problem.
6. How much does it typically cost to repair the B1187 OBDII code related to a short to ground in the passenger side air bag circuit in a Lexus?
The cost of repairs can vary depending on the exact cause of the issue, but it may involve replacing damaged wiring, connectors, or components in the air bag system, which can range from a few hundred to a few thousand dollars.
7. Are there any safety precautions I should take if I suspect a short to ground in the passenger side air bag circuit of my Lexus?
It is important to avoid tampering with the air bag system, as it contains explosive devices that can deploy accidentally and cause injury. Always consult a professional for diagnosis and repair of airbag-related issues.
8. Can the B1187 OBDII code be triggered by other factors besides a short to ground in the passenger side air bag circuit?
While the code specifically indicates a short to ground in the air bag system, other related faults or malfunctions in the system can sometimes trigger this code as well.
9. How long does it typically take to repair the B1187 OBDII code indicating a short to ground in the passenger side air bag circuit?
The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and repair the problem.
10. Is it important to address the B1187 OBDII code indicating a short to ground in the passenger side air bag circuit promptly?
Yes, it is crucial to address this issue promptly to ensure the proper operation of the passenger side airbag system in the event of a collision and maintain the safety of the vehicle occupants.
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