B1187 Honda Code - Gauge Control Module Lost Communication with the SRS Unit
Quick Answer
The B1187 Honda code indicates that there is a communication error between the Gauge Control Module and the Supplemental Restraint System (SRS) Unit in the vehicle. Common causes include Faulty wiring or connections between the Gauge Control Module and SRS Unit, Corrosion or damage to the connectors or terminals, Defective Gauge Control Module or SRS Unit. 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 Honda indicates Gauge Control Module Lost Communication with the SRS Unit.
- Common causes
- Common causes include Faulty wiring or connections between the Gauge Control Module and SRS Unit, Corrosion or damage to the connectors or terminals, Defective Gauge Control Module or SRS Unit.
- 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 Honda Description
The B1187 Honda code indicates that there is a communication error between the Gauge Control Module and the Supplemental Restraint System (SRS) Unit in the vehicle. The Gauge Control Module is responsible for controlling various gauges and indicators on the vehicle's dashboard, while the SRS Unit is crucial for the proper functioning of the airbags and seatbelt pre-tensioners in case of a collision. When these two modules are unable to communicate effectively, it can lead to issues with the vehicle's safety systems and overall performance.
Common Causes of B1187 Honda
- Faulty wiring or connections between the Gauge Control Module and SRS Unit
- Corrosion or damage to the connectors or terminals
- Defective Gauge Control Module or SRS Unit
- Software issues or programming errors
- Electrical interference or signal disruption
Symptoms of B1187 Honda
- Airbag warning light illuminated on the dashboard
- Inaccurate or erratic readings on the gauges
- Loss of communication with other modules in the vehicle
- SRS system failure or malfunction
- Vehicle may go into limp mode
How to Fix B1187 Honda
- Begin by conducting a thorough inspection of the wiring, connectors, and terminals between the Gauge Control Module and SRS Unit.
- Test the communication between the modules using a diagnostic scanner to pinpoint the exact source of the issue.
- Replace any damaged wiring, connectors, or terminals as needed.
- If the modules are found to be faulty, they may need to be replaced with new units.
- After completing the repairs, clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix B1187 Honda
The cost of repairing a B1187 Honda code can vary depending on the extent of the issue and the specific parts that need to be replaced. On average, the repair costs for this type of communication error can range from $200 to $500, including parts and labor. However, as mentioned earlier, labor rates can vary between different auto repair shops, so it's advisable to obtain quotes from multiple sources before proceeding with the repair.
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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 Honda Code
1. What are the common symptoms of OBDII code B1187 in a Honda related to Gauge Control Module communication loss with the SRS unit?
- Common symptoms include the airbag warning light illuminating on the dashboard, loss of communication with the gauge cluster, and potential issues with the airbag system.
2. What are the possible causes of the B1187 code in a Honda?
- The code B1187 can be triggered by a faulty Gauge Control Module, a communication error between the module and the SRS unit, a damaged wiring harness, or a malfunction in the SRS system.
3. How can I diagnose the cause of the B1187 code in my Honda?
- Diagnosis involves using an OBDII scanner to retrieve the specific code, checking the connections between the Gauge Control Module and SRS unit, inspecting the wiring harness for damage, and performing a system reset if needed.
4. Is it safe to drive my Honda with the B1187 code illuminated?
- It is not recommended to drive the vehicle with the B1187 code active, as it indicates a potential issue with the airbag system, which is crucial for occupant safety in the event of a collision.
5. Can I repair the B1187 code in my Honda myself, or do I need to take it to a professional mechanic?
- Depending on your familiarity with automotive diagnostics and repairs, you may be able to address the B1187 code yourself by checking connections and wiring. However, if you are unsure or the issue is complex, it is best to consult a professional mechanic.
6. What are some common repair tips for resolving the B1187 code in a Honda?
- Repair tips may include checking and securing the connections between the Gauge Control Module and SRS unit, inspecting the wiring harness for damage or corrosion, and performing a system reset to clear the code.
7. Can a low battery voltage cause the B1187 code to appear in a Honda?
- Yes, low battery voltage or a weak battery can sometimes trigger communication errors between modules, including the Gauge Control Module and SRS unit, leading to the B1187 code.
8. Will resetting the B1187 code make it go away permanently?
- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the B1187 code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem.
9. How long does it typically take to repair the B1187 code issue in a Honda?
- The repair time for the B1187 code can vary depending on the specific cause of the problem. Simple fixes like reseating connectors or resetting the system may take a short time, while more complex issues may require more extensive diagnosis and repair.
10. Is the B1187 code specific to Honda vehicles, or can it occur in other car makes and models?
- While the B1187 code is associated with Honda vehicles and the communication between the Gauge Control Module and SRS unit, similar codes related to communication loss between modules can occur in other car makes and models as well.
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