What is a Honda Civic FN airbag control unit?
The Honda Civic FN airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors various sensors, stores important crash data, and ensures the proper functioning of all airbag modules in the vehicle for maximum safety.
This component, also known as the SRS unit, is a key component of the supplemental restraint system. It makes a split-second decision about whether the protective mechanisms are triggered.
The control unit is closely integrated with the onboard electronics of the Honda Civic FN. It receives signals from impact sensors as well as seat occupancy and seat belt fastening sensors.
Why is the Honda Civic FN airbag control unit defective?
A Honda Civic FN airbag control unit often fails because it permanently stores crash data after an accident or because internal electronic errors occur. This causes the airbag warning light to illuminate and the system can no longer properly perform its safety function, making repair unavoidable.
After a collision, the control unit irreversibly stores crash information, often requiring reprogramming or replacement. Even without an accident, aging, short circuits, or moisture can lead to internal errors.
A failure of the airbag control unit compromises the vehicle's overall passive safety. A professional diagnosis at a workshop is crucial to determine the cause and initiate the necessary Honda Civic FN airbag control unit repair.
Common error codes for Honda Civic FN airbag control unit repair
When repairing the Honda Civic FN airbag control unit, specific error codes are crucial. They indicate internal problems or communication errors within the control unit. These codes, such as B1000 or 87-31, usually signal a direct malfunction of the SRS unit that must be corrected to restore safety.
- B1000 → Control unit communication error → Internal SDM malfunction or connection failure.
- B1499 → Deployed airbag detected → Permanent storage of crash data after an accident.
- 87-31 → Internal error of the SRS unit → Electronic defect within the control unit.
- 87-32 → Side Impact Air Bag Cutoff Indicator Stays On → Internal error related to the side air bag cutoff indicator.
- 91-1x → Internal error of the SRS unit → General internal malfunction of the SRS software or hardware.
- 91-2x → Short circuit/open circuit in the SRS indicator circuit → Problem with the wiring or the control of the airbag warning light.
- 85-63 → Model ID code or variation code inconsistent → Incompatibility or incorrect programming of the control unit for the vehicle model.
- 85-64 → ECU serial number inconsistent → Incorrect serial number in the control unit, possibly after improper repair or replacement.
- 85-71, 85-78, 85-79 → OPDS initialization and drift errors → Problems with the calibration or function of the occupant position detection system.
What part numbers are available for the Honda Civic FN airbag control unit repair?
The only verified and 100% accurate OEM part number for the Honda Civic FN airbag control unit repair is 77960-S5P-A121-M1 from Honda itself. This number is crucial to ensure that the replacement or repair part fits your vehicle model perfectly and ensures safe operation.
It's important to note that other part numbers such as 77960-SMG-G014-M1 (for Civic X) or 77960-TV0-G020-M4 (for Civic 9th Gen) are not compatible with the Honda Civic FN. Only an exact serial number match guarantees correct function.
When purchasing a replacement part or for Honda Civic FN airbag control unit repair, please use only the OEM number 77960-S5P-A121-M1. This will prevent malfunctions and ensure the vehicle meets safety standards. No alternative OEM part numbers from suppliers have been found for this specific model.