B00D3
Restraint System Malfunction Indicator 2.
- Generic
- Body
- Generic code
- Medium severity
How this code is built
- B
- SystemBody
- 0
- Defined bySAE, the same on every car
- 0
- AreaBody area 0
- D3
- FaultThe specific fault in that area
What it means
B00D3 is the SAE J2012 generic code for a fault in Restraint System Malfunction Indicator 2, the second warning indicator controlled by the airbag (SRS) control unit. The control unit has found a fault in that indicator's circuit, its control or its status. Exactly which lamp this is, and what the control unit tests, varies by manufacturer and model, so confirm it against the vehicle's own documentation.
Symptoms
- Airbag or SRS warning light on, flashing or behaving oddly
- Second restraint-related indicator (for example a passenger airbag status lamp, where fitted) not lighting, stuck on or flickering
- Warning light fails to complete its normal bulb check at ignition on
- Other stored restraint system codes alongside B00D3
- Failed inspection or test because of the airbag warning
Possible causes
- Fault in the wiring or connector to the indicator, such as a loose, corroded or damaged pinlikely
- Faulty indicator lamp or LED, or a fault in the instrument cluster or display that drives itlikely
- Low battery voltage or a poor earth or supply to the SRS control unit or cluster, causing a temporary faultpossible
- Recent work on seats, trim, dashboard or steering column that has disturbed a connector or harnesspossible
- Communication fault between the SRS control unit and the cluster or other module that controls the indicatorpossible
- Faulty SRS control unit or outdated software, where this is a known issue for the specific modelrare
How to diagnose
- Scan all modules, record every stored and pending code and any freeze frame or status data, and note whether other restraint codes are present
- Check the warning light behaviour at ignition on and compare it with the manufacturer's expected bulb check sequence
- Test battery condition and charging voltage, as low voltage can set restraint codes
- Look for signs of recent repair or modification around the seats, dashboard, centre console and steering column, and check the connectors there are fully seated
- Wait the time the manufacturer specifies after disconnecting the battery before touching any airbag connector, then inspect the indicator and SRS control unit connectors for damage, corrosion or bent pins
- Check the indicator circuit supply, earth and signal using the manufacturer's wiring diagram, and never probe airbag deployment circuits with a test lamp or an unsuitable meter
- Check for communication faults and for manufacturer service bulletins covering the SRS control unit or cluster on this model
- Clear the code after the repair, then retest and confirm the light behaves correctly and the code does not return
How to fix
- Repair or replace damaged wiring and clean or refit corroded or loose connectors in the indicator circuit
- Replace the faulty indicator or repair the instrument cluster or display, as directed by the manufacturer's procedure
- Correct battery, supply or earth problems affecting the SRS control unit or cluster
- Refit or correct any connector or harness disturbed during previous work
- Update the SRS control unit or cluster software, or replace the unit, only if the manufacturer identifies this as the cause, and following their procedure
Can I keep driving?
The car can usually be driven, but the airbag system may not be fully monitored or may not work correctly in a crash, so have it checked as soon as possible. Treat it as more urgent if the main airbag warning light is also on or other restraint codes are stored.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.