What is a Honda City SL airbag control unit?
The Honda City SL airbag control unit is the central safety unit in your vehicle, continuously monitoring all relevant sensors. It precisely activates occupant restraint systems such as airbags and seatbelt pretensioners in the event of an accident, stores important crash data, and is therefore essential for the safety of vehicle occupants.
This electronic control unit, also called an ECU, analyzes data from front, side, and roll monitoring sensors to determine the severity and type of impact.
It is responsible for the precise deployment of the airbags and the activation of the seat belt tensioners, optimized for the protection of the driver and front passengers.
Why is the Honda City SL airbag control unit defective?
A Honda City SL airbag control unit often fails because it stores crash data after an accident, preventing it from being reset. Internal hardware or software errors, voltage spikes, or age-related wear can also cause failure. This is often indicated by a permanently illuminated airbag warning light.
Typical causes of failure are crash events that leave permanent errors in the memory and make a Honda City SL airbag control unit repair necessary.
Moisture ingress or short circuits within the vehicle electronics can also permanently damage the control unit, leading to a complete failure.
A defective airbag control unit prevents the entire airbag system from functioning properly and must be repaired or replaced immediately to ensure vehicle safety.
Common error codes for Honda City SL airbag control unit repair
During Honda City SL airbag control unit repair, specific diagnostic codes indicate internal ECU problems. These codes help identify precise causes such as hardware or software defects, internal communication problems, or ECU identification errors, allowing for targeted troubleshooting.
- 87-31: SRS control unit internal error → Unknown internal defect or software problem of the airbag ECU.
- 87-32: Side Impact Air Bag Cutoff Indicator remains on → Side impact air bag cutoff indicator control or communication error.
- 91-1x: SRS control unit internal error → General internal malfunction of the airbag control unit requiring diagnosis.
- 91-2x: Short circuit in the SRS warning light circuit → Problem with the control or wiring of the airbag warning light in the instrument panel.
- 85-63: Model ID code or variation code inconsistent → Inconsistency in the configuration or identification of the control unit after replacement or reset.
- 85-64: ECU serial ID code inconsistent → Different serial number of the control unit, often after manipulation or incompatible replacement.
- 85-71/85-78: OPDS unit not initialized → Error initializing the passenger seat occupant detection, which affects the control unit.
These specific DTCs signal problems that directly affect the airbag control module and not external sensors or actuators.
A precise diagnosis with a suitable scanner is essential to locate the exact cause of the failure and successfully perform the Honda City SL airbag control unit repair.
What part numbers are available for the Honda City SL airbag control unit repair?
For Honda City SL airbag control unit repairs, exact OEM part numbers are difficult to access and could not be definitively verified. These numbers are often only available through manufacturer catalogs or specialized databases like TecDoc with a specific chassis number to ensure precise compatibility.
Without access to such licensed databases, it is not possible to provide a verified, exact OEM part number for your Honda City SL airbag control unit.
We therefore recommend using the Vehicle Identification Number (VIN) and searching for the correct part number directly with an authorized Honda dealer or via a TecDoc-certified database before attempting any repair or replacement.
This ensures that the correct control unit is selected for your specific vehicle model and year, avoiding further errors.