B1187 Code - Gauge Control Module Lost Communication with the SRS Unit
Quick Answer
The Supplemental Restraint System (SRS) Airbag Unit (airbag Module) monitors the Gauge Control Module (Tachometer Module) communication. Common causes include Faulty Supplemental Restraint System (SRS) Airbag Unit, Faulty Gauge Control Module, Gauge Control Module harness is open or shorted. 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 indicates Gauge Control Module Lost Communication with the SRS Unit.
- Common causes
- Common causes include Faulty Supplemental Restraint System (SRS) Airbag Unit, Faulty Gauge Control Module, Gauge Control Module harness is open or shorted.
- 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 B1187 Description
What are the Possible Causes of the DTC B1187?
- Faulty Supplemental Restraint System (SRS) Airbag Unit
- Faulty Gauge Control Module
- Gauge Control Module harness is open or shorted
- Gauge Control Module circuit poor electrical connection
How to Fix the DTC B1187?
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 B1187 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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Information for Specific Makes
- B1187 Acura — Gauge Control Module Lost Communication with the SRS Unit
- B1187 Honda — Gauge Control Module Lost Communication with the SRS Unit
- B1187 Lexus — Short To Ground In Passenger Side Air Bag Module Second Stage Squib Circuit
- B1187 Scion — Short To Ground In Passenger Side Air Bag Module Second Stage Squib Circuit
- B1187 Toyota — Short To Ground In Passenger Side Air Bag Module Second Stage Squib Circuit
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 Code
1. What are the common symptoms of OBDII code B1187?
- Common symptoms include the airbag or SRS warning light illuminating on the dashboard and potential loss of communication with the gauge control module.
2. What are the possible causes of OBDII code B1187?
- The code B1187 can be triggered by issues such as a faulty gauge control module, a damaged SRS unit, wiring problems, or a communication error between the two components.
3. How can I diagnose OBDII code B1187?
- Diagnosing code B1187 involves using a scan tool to retrieve the specific error code, checking the connections and wiring between the gauge control module and SRS unit, and testing the components for proper functionality.
4. Can I drive my vehicle with OBDII code B1187?
- It is not recommended to drive your vehicle with OBDII code B1187 present, as it indicates a potential issue with the SRS system, which is crucial for occupant safety in the event of a collision.
5. How can I repair OBDII code B1187?
- Repairing code B1187 may involve replacing a faulty gauge control module, repairing damaged wiring or connections, resetting the system, or seeking professional assistance for further diagnosis and repair.
6. Are there any safety concerns associated with OBDII code B1187?
- Yes, OBDII code B1187 relates to the Supplemental Restraint System (SRS), which includes airbags. Driving with this code unresolved may compromise the effectiveness of the airbags in the event of an accident.
7. Can a DIY enthusiast fix OBDII code B1187 at home?
- Depending on your experience and access to tools, you may be able to address simple causes like loose connections. However, for more complex issues, it is advisable to seek professional help to ensure proper diagnosis and repair.
8. How much does it cost to repair OBDII code B1187?
- The cost of repairing code B1187 can vary widely depending on the root cause of the issue, the extent of the damage, and whether you choose to repair it yourself or seek help from a mechanic. It's best to get a diagnosis and estimate from a professional.
9. Will resetting the OBDII code B1187 make it go away permanently?
- Resetting the code may temporarily turn off the warning light, but if the underlying issue persists, the code is likely to return. It's crucial to diagnose and fix the root cause to prevent future occurrences.
10. How long does it take to repair OBDII code B1187?
- The repair time for code B1187 can vary depending on the complexity of the issue, the availability of parts, and the expertise of the person performing the repair. Simple fixes may take a few hours, while more involved repairs could require more time.
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