B1277 2015 Chevrolet Silverado Code - Microphone 1 Input Signal Circuit
Quick Answer
For Cellular, Entertainment, and Navigation Systems: The Human Machine Interface Control Module uses the cellular telephone microphone for voice recognition and cellular features. Common causes include Faulty Cellular Phone Microphone (For Cellular, Entertainment, and Navigation Systems), Faulty Radio Volume Compensator Interior Noise Microphone (For Active Noise Cancellation System), Faulty Audio Amplifier (For Active Noise Cancellation System). Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B1277 2015 Chevrolet Silverado indicates Microphone 1 Input Signal Circuit.
- Common causes
- Common causes include Faulty Cellular Phone Microphone (For Cellular, Entertainment, and Navigation Systems), Faulty Radio Volume Compensator Interior Noise Microphone (For Active Noise Cancellation System), Faulty Audio Amplifier (For Active Noise Cancellation System).
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B1277 2015 Chevrolet Silverado Description
The Human Machine Interface Control Module uses the cellular telephone microphone for voice recognition and cellular features. The Human Machine Interface Control Module provides a bias voltage to each microphone (+) and (-) signal circuit for the operation of the microphone.
The radio provides the cellular phone microphone with a supplied voltage on the cellular phone microphone high signal circuit. When the microphone is in use, voice data from the user is sent back to the radio on the cellular microphone low signal circuit.
For Active Noise Cancellation System:
The active noise cancellation system uses three microphones in the vehicle headliner: one above each front seating position, and one above the rear seat. The Audio Amplifier provides a bias voltage to each microphone (+) and (-) signal circuit for the operation of the microphone. The microphones monitor the vehicle cabin for undesirable engine sounds. The Audio Amplifier uses the microphone inputs and an engine RPM signal to determine the frequency of the undesirable sound.
What are the Possible Causes of the DTC B1277 2015 Chevrolet Silverado?
- Faulty Cellular Phone Microphone (For Cellular, Entertainment, and Navigation Systems)
- Faulty Radio Volume Compensator Interior Noise Microphone (For Active Noise Cancellation System)
- Faulty Audio Amplifier (For Active Noise Cancellation System)
- Faulty Human Machine Interface Control Module or Radio (For Cellular, Entertainment, and Navigation Systems)
How to Fix the DTC B1277 2015 Chevrolet Silverado?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1277 2015 Chevrolet Silverado 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.
Need more information about the B1277 2015 Chevrolet Silverado code?
Need more information on how to fix the B1277 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1277 2015 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1277 2015 Chevrolet Silverado Code
1. What does OBDII code B1277 mean on a 2015 Chevrolet Silverado?
Code B1277 indicates an issue with the Microphone 1 Input Signal Circuit, which may affect the vehicle's hands-free or voice recognition system.
2. What are the common symptoms of code B1277 in a 2015 Chevrolet Silverado?
Symptoms may include non-functional voice recognition, poor audio quality during phone calls, or the hands-free system not detecting voice inputs.
3. What causes code B1277 on a Chevrolet Silverado?
Common causes include a damaged or disconnected microphone, faulty wiring or connectors in the microphone circuit, or a malfunctioning infotainment module.
4. How can I diagnose the issue causing code B1277?
Start by inspecting the microphone and its wiring for visible damage or loose connections. Use a multimeter to check for continuity in the circuit and ensure the infotainment module is receiving proper input.
5. Can a faulty microphone trigger the B1277 code?
Yes, a defective microphone can prevent proper signal transmission and trigger this code.
6. How do I fix code B1277 in my Silverado?
Repairs may involve replacing the microphone, repairing damaged wiring or connectors, or reprogramming or replacing the infotainment module if necessary.
7. Where is Microphone 1 located in the 2015 Chevrolet Silverado?
Microphone 1 is typically located in the overhead console or near the rearview mirror, depending on the trim level and configuration.
8. Can I continue driving with code B1277 present?
Yes, you can drive safely, but the hands-free and voice recognition features may not function correctly until the issue is resolved.
9. How much does it cost to repair code B1277?
Repair costs vary but typically range from $100 to $300, depending on whether the microphone, wiring, or infotainment module requires attention.
10. Will disconnecting the battery clear the B1277 code?
Disconnecting the battery may temporarily clear the code, but if the underlying issue is not resolved, the code will likely return.
Discuss the causes and fixes for B1277 2015 Chevrolet Silverado OBDII Code
Code B1277 2015 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
