What is a Honda Prelude SN airbag control unit?
The Honda Prelude SN 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 to maximize occupant safety. Repairing the Honda Prelude SN airbag control unit will restore full functionality.
This module is responsible for controlling airbag deployment and the seatbelt systems. It detects accident events through various sensors in the vehicle, ensuring quick and precise airbag activation when necessary.
Why is the Honda Prelude SN airbag control unit defective?
A defective Honda Prelude SN airbag control unit is often the result of an accident, as the module stores crash data and locks up. Internal errors or voltage fluctuations can cause failure even without an accident, necessitating repair of the Honda Prelude SN airbag control unit.
After an accident, the module stores irretrievable crash data. These so-called hard codes prevent the system from functioning until repaired or reset.
Even without a crash, the airbag control unit can fail. Age-related material fatigue or faulty electronics can then lead to system failure. A precise diagnosis helps determine the exact cause.
Common error codes for Honda Prelude SN airbag control unit repair
During Honda Prelude SN airbag control unit repairs, specific error codes may occur that indicate internal problems or inconsistencies within the module. These codes, such as 87-31 or B1620, often signal a defect in the control unit itself and must be read for successful diagnosis and repair. A professional repair shop can assist with this.
The following error codes are typical of an internal defect in the airbag control unit and often require repair of the Honda Prelude SN airbag control unit:
- 87-31 → Internal error of the SRS control unit → Indicates a malfunction of the airbag ECU.
- 91-1x → SRS control unit internal error → Indicates a general internal malfunction of the control unit.
- 85-63 → Model ID code or variation code inconsistent → The control unit does not correctly recognize the vehicle configuration.
- 85-64 → Serial ID code of the control unit inconsistent → There is a discrepancy in the serial number recognition of the module.
- 87-32 → Side impact airbag deactivation indicator remains on → Signals a persistent warning in the system that is attributable to the control module.
- 91-2x → Short circuit or open circuit in the SRS indicator circuit → Affects the internal logic of the warning light.
- B1620 → Control unit internal error detection, control unit defective → A clear indication of a serious internal defect.
- B1670 → Control unit internal error detection, control unit defective → Confirms an internal error of the airbag module.
- B1000 → Control unit communication error → Problems with data transmission within the ECU or to the vehicle network.
- 8-5 / 5-1 / 9-1 → Internal error of the SRS control unit → General internal errors that mean a failure of the system.
What part numbers are available for the Honda Prelude SN airbag control unit repair?
For Honda Prelude SN airbag control unit repair, two OEM part numbers are primarily relevant: 77960-S30-A81 and 38850830 / G8C-244H. These identify the original control units for the Honda Prelude SN and adjacent model years, which is crucial for a correct repair or replacement. Always ensure that the numbers match.
The exact part number is crucial to ensure airbag control unit compatibility. Here are the verified OEM numbers for the Honda Prelude SN and similar models that are relevant when repairing the Honda Prelude SN airbag control unit:
- 77960-S30-A81 : This is a genuine Honda OEM part number, specifically for the SRS airbag control module of the 1997 Honda Prelude (SN series).
- 38850830 / G8C-244H : This number is also a Honda OE number for control units in the Prelude from approximately 1996-2002. G8C-244H is the corresponding manufacturer's code.
It's important to check these numbers when purchasing replacement parts or requesting repairs for the Honda Prelude SN airbag control unit. Confusion with airbag modules or sensors should be avoided.