Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSAIR BAG SYSTEM (DIAGNOSTICS)
2016 Subaru Legacy 2.5i
Air Bag System (Diagnostics)
2016 Subaru Legacy 2.5iSECTION Air Bag System (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Component Location
- Airbag Connector
- Airbag Control Module I/O Signal
- Subaru Select Monitor
- Read Diagnostic Trouble Code (DTC)
- Inspection Mode
- Clear Memory Mode
- Read Current Data
- Event Record Data
- Batch save of Event record data
- Airbag Warning Light Illumination Pattern
- Airbag Warning Light Failure
- List of Diagnostic Trouble Code (DTC)
- Diagnostic Chart with Trouble Code
- DTC U0073 Control Module Communication Bus Off
- DTC U0100 Lost Communication With ECM/Pcm "A"
- DTC U0101 Lost Communication With TCM
- DTC U0122 Lost Communication With Vehicle Dynamics Control Module
- DTC U0140 Lost Communication With Body Control Module
- DTC U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module
- DTC U0401 Invalid Data Received From ECM/Pcm "A"
- DTC U0402 Invalid Data Received From TCM
- DTC U0416 Invalid Data Received From Vehicle Dynamics Control Module
- DTC U0422 Invalid Data Received From Body Control Module
- DTC U0423 Invalid Data Received From Instrument Panel Cluster Control Module
- DTC B1000 Airbag Ecu Malfunction
- DTC B1003 Airbag Ecu Malfunction
- DTC B1004 Airbag Ecu Malfunction
- DTC B1005 Airbag Ecu Malfunction
- DTC B1006 Airbag Ecu Malfunction
- DTC B111A Airbag Ecu Malfunction
- DTC B111B Airbag Ecu Malfunction
- DTC B1125 Airbag Ecu Malfunction
- DTC B1126 Airbag Ecu Malfunction
- DTC B1135 Airbag Ecu Malfunction
- DTC B1136 Airbag Ecu Malfunction
- DTC B113A Airbag Ecu Malfunction
- DTC B1145 Airbag Ecu Malfunction
- DTC B1146 Airbag Ecu Malfunction
- DTC B117A Airbag Ecu Malfunction
- DTC B1185 Airbag Ecu Malfunction
- DTC B1195 Airbag Ecu Malfunction
- DTC B1196 Airbag Ecu Malfunction
- DTC B1197 Airbag Ecu Malfunction
- DTC B1198 Airbag Ecu Malfunction
- DTC B1199 Airbag Ecu Malfunction
- DTC B11E0 Rollover Deployment History
- DTC B11F0 Disposal Process Complete
- DTC B11F3 Front Impact Deployment
- DTC B11F4 Front Impact Deployment
- DTC Detecting Condition
- DTC B11F5 Front Impact Deployment
- DTC B11F7 Side Impact Deployment
- DTC B11F8 Side Impact Deployment
- DTC B11F9 Side Impact Deployment
- DTC B11FA Side Impact Deployment
- DTC B11FB Side Impact Deployment
- DTC B11FC Side Impact Deployment
- DTC B1610 Front Sub Sensor RH Failure
- DTC B1612 Front Sub Sensor RH Lost Communication
- DTC B1613 Front Sub Sensor RH Initialization Error
- DTC B1615 Front Sub Sensor LH Failure
- DTC B1617 Front Sub Sensor LH Lost Communication
- DTC B1618 Front Sub Sensor LH Initialization Error
- DTC B1620 Side Airbag Sensor RH Failure
- DTC B1622 Side Airbag Sensor RH Lost Communication
- DTC B1623 Side Airbag Sensor RH Initialization Error
- DTC B1625 Side Airbag Sensor LH Failure
- DTC B1627 Side Airbag Sensor LH Lost Communication
- DTC B1628 Side Airbag Sensor LH Initialization Error
- DTC B1630 Curtain Airbag Sensor RH Failure
- DTC B1632 Curtain Airbag Sensor RH Lost Communication
- DTC B1633 Curtain Airbag Sensor RH Initialization Error
- DTC B1635 Curtain Airbag Sensor LH Failure
- DTC B1637 Curtain Airbag Sensor LH Lost Communication
- DTC B1638 Curtain Airbag Sensor LH Initialization Error
- DTC B1643 Side Satellite Sensor Bus RH Initialization Error
- DTC B1648 Side Satellite Sensor Bus LH Initialization Error
- DTC B1650 Occupant Detection System Malfunction
- DTC B1652 Incomplete Connection In Airbag Sensor Connector
- DTC B1655 Front Buckle Switch RH Failure
- DTC B1656 Front Buckle Switch LH Failure
- DTC B1661 Passenger's Airbag On/Off Indicator Failure
- DTC B1690 Door Sensor RH Failure
- DTC B1692 Lost Communication With Door Sensor RH
- DTC B1693 Door Sensor RH Initialization Incomplete
- DTC B1695 Door Sensor LH Failure
- DTC B1697 Lost Communication With Door Sensor LH
- DTC B1698 Door Sensor LH Initialization Incomplete
- DTC B169F Door Sensor Failure: Abnormal Pressure
- DTC B16A2 Short In Front Sub Sensor RH (To Ground)
- DTC B16A3 Short In Front Sub Sensor RH (To +B)
- DTC B16A4 Short In Front Sub Sensor RH
- DTC B16A7 Short In Front Sub Sensor LH (To Ground)
- DTC B16A8 Short In Front Sub Sensor LH (To +B)
- DTC B16A9 Short In Front Sub Sensor LH
- DTC B16B2 Short In Side Satellite Sensor Bus RH (To Ground)
- DTC B16B3 Short In Side Satellite Sensor Bus RH (To +B)
- DTC B16B4 Short In Side Satellite Sensor Bus RH
- DTC B16B7 Short In Side Satellite Sensor Bus LH (To Ground)
- DTC B16B8 Short In Side Satellite Sensor Bus LH (To +B)
- DTC B16B9 Short In Side Satellite Sensor Bus LH
- DTC B16EA Side Airbag Sensor RH Initialization Error
- DTC B16EB Side Airbag Sensor LH Initialization Error
- DTC B16EC Curtain Airbag Sensor RH Initialization Error
- DTC B16ED Curtain Airbag Sensor LH Initialization Error
- DTC B1800 Short In Driver's Airbag
- DTC B1801 Open In Driver's Airbag
- DTC B1802 Short In Driver's Airbag (To Ground)
- DTC B1803 Short In Driver's Airbag (To +B)
- DTC B1804 Short In Driver's Airbag
- DTC B1805 Short In Passenger's Airbag
- DTC B1806 Open In Passenger's Airbag
- DTC B1807 Short In Passenger's Airbag (To Ground)
- DTC B1808 Short In Passenger's Airbag (To +B)
- DTC B1809 Short In Passenger's Airbag
- DTC B1810 Short In Driver's Airbag Dual Stage - 2ND Step
- DTC B1811 Open In Driver's Airbag Dual Stage - 2ND Step
- DTC B1812 Short In Driver's Airbag Dual Stage - 2ND Step (To Ground)
- DTC B1813 Short In Driver's Airbag Dual Stage - 2ND Step Circuit (To +B)
- DTC B1814 Short In Driver's Airbag Dual Stage - 2ND Step
- DTC B1815 Short In Passenger's Airbag Dual Stage - 2ND Step
- DTC B1816 Open In Passenger's Airbag Dual Stage - 2ND Step
- DTC B1817 Short In Passenger's Airbag Dual Stage - 2ND Step (To Ground)
- DTC B1818 Short In Passenger's Airbag Dual Stage - 2ND Step Circuit (To +B)
- DTC B1819 Short In Passenger's Airbag Dual Stage - 2ND Step
- DTC B1820 Short In Side Airbag RH
- DTC B1821 Open In Side Airbag RH
- DTC B1822 Short In Side Airbag RH (To Ground)
- DTC B1823 Short In Side Airbag RH (To +B)
- DTC B1824 Short In Side Airbag RH
- DTC B1825 Short In Side Airbag LH
- DTC B1826 Open In Side Airbag LH
- DTC B1827 Short In Side Airbag LH (To Ground)
- DTC B1828 Short In Side Airbag LH (To +B)
- DTC B1829 Short In Side Airbag LH
- DTC B1830 Short In Curtain Airbag RH Squib Circuit
- DTC B1831 Open In Curtain Airbag RH Squib Circuit
- DTC B1832 Short In Curtain Airbag RH Squib Circuit (To Ground)
- DTC B1833 Short In Curtain Shield Airbag RH Squib Circuit (To +B)
- DTC B1834 Short In Curtain Airbag RH Squib Circuit
- DTC B1835 Short In Curtain Airbag LH Squib Circuit
- DTC B1836 Open In Curtain Airbag LH Squib Circuit
- DTC B1837 Short In Curtain Airbag LH Squib Circuit (To Ground)
- DTC B1838 Short In Curtain Shield Airbag LH Squib Circuit (To +B)
- DTC B1839 Short In Curtain Airbag LH Squib Circuit
- DTC B1870 Short In Front Seat Cushion Airbag RH
- DTC B1871 Open In Front Seat Cushion Airbag RH
- DTC B1872 Short In Front Seat Cushion Airbag RH (To Ground)
- DTC B1873 Short In Front Seat Cushion Airbag RH (To +B)
- DTC B1874 Short In Front Seat Cushion Airbag RH
- DTC B1875 Short In Front Seat Cushion Airbag LH
- DTC B1876 Open In Front Seat Cushion Airbag LH
- DTC B1877 Short In Front Seat Cushion Airbag LH (To Ground)
- DTC B1878 Short In Front Seat Cushion Airbag LH (To +B)
- DTC B1879 Short In Front Seat Cushion Airbag LH
- DTC B1900 Short In Front P/T RH
- DTC B1901 Open In Front P/T RH
- DTC B1902 Short In Front P/T RH (To Ground)
- DTC B1903 Short In Front P/T RH (To +B)
- DTC B1904 Short In Front P/T RH
- DTC B1905 Short In Front P/T LH
- DTC B1906 Open In Front P/T LH
- DTC B1907 Short In Front P/T LH (To Ground)
- DTC B1908 Short In Front P/T LH (To +B)
- DTC B1909 Short In Front P/T LH
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.