What is a Honda Civic FB airbag control unit?
The Honda Civic FB airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle, making it crucial for your safety.
This sophisticated module, often known as the SRS control unit, rapidly processes information from various sensors in the vehicle. It is responsible for precisely deploying airbags, seatbelt pretensioners, and other restraint systems in the event of a collision.
It is specifically designed for the 9th generation Honda Civic (type FB, FK1/FK2/FK3) from 2011 to 2017. A repair of the Honda Civic FB airbag control unit is often necessary if the warning light is permanently illuminated.
Why is the Honda Civic FB airbag control unit defective?
A Honda Civic FB airbag control unit often fails because it stores crash data after an accident that needs to be erased, or because internal components fail due to aging, moisture, or overvoltage. This results in a broken system that requires immediate repair.
The most common cause of a defect is the storage of crash data after an accident, which blocks the control unit. Even if the airbags aren't deployed, this storage is often irreversible and requires repair of the control unit.
An internal failure, such as a short circuit or software error, can also disable the airbag control unit. Such failures often manifest themselves as the SRS warning light on the dashboard constantly illuminated, requiring rapid diagnosis.
Common error codes for Honda Civic FB airbag control unit repair
Typical error codes that require a Honda Civic FB airbag control unit repair directly indicate problems within the control unit itself, such as communication errors, internal defects, or short circuits. These specific codes help with the precise diagnosis of the failure.
- B1000: Control unit communication error → Cause: Problems with the data transmission between the airbag control unit and other systems in the vehicle.
- B1015: Faulty Airbag Control Module → Cause: An internal defect or malfunction in the module itself that causes it to break.
- B1139: SRS control unit error → Cause: Memory conflicts or internal configuration problems within the control unit.
- B1193: Airbag module related error (control unit) → Cause: General failure of the control unit logic or internal processing.
- 87-31: Internal failure of the SRS control unit → Cause: A serious hardware or software defect in the control unit.
- 91-1x: Internal error in the SRS control unit logic → Cause: A malfunction in the internal processing logic of the control unit.
- 91-2x: Short circuit in the SRS indicator circuit → Cause: An electrical short circuit that impairs the function of the airbag indicator light.
Properly diagnosing these codes is the first step to restoring the airbag system and ensuring your safety.
What part numbers are available for the Honda Civic FB airbag control unit repair?
When repairing a Honda Civic FB airbag control unit, specific OEM part numbers are crucial to ensure correct compatibility. Verified original parts include 77960-TV0-G020-M4, 77960-S5P-A121-M1, and 77960-S5S-G920-M1, allowing for precise selection.
The number 77960-TV0-G020-M4 is a genuine Honda number that is explicitly listed for the 9th generation of the Civic (type FK1/FK2/FK3) and is often used in the Honda Civic FB airbag control unit repair.
Furthermore, 77960-S5P-A121-M1 is considered the OEM number listed on MyAirbags.com as suitable for Honda Civic FB models. Its similar structure to the FB series makes it relevant for replacement or repair.
Part number 77960-S5S-G920-M1 is also a genuine Honda part number that is compatible with closely related Civic series such as EP1/2 and can be used on certain models of the Civic FB.
It is essential to match the exact part number of the defective control unit with the replacement part number. This is the most critical step to ensure that the repaired or replaced control unit will function properly in the vehicle.