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.
2009 Toyota Yaris S, 4D HatchbackFACTORY OEM SERVICE PROCEDURE
Supplemental Restraint System
- Airbag System
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- DTC Check / Clear
- Check Mode Procedure
- Data List / Active Test
- Diagnostic Trouble Code Chart
- DTC B1000/31 Center Airbag Sensor Assembly Malfunction
- DTC B1610/13 Front Airbag Sensor RH Circuit Malfunction
- DTC B1615/14 Front Airbag Sensor LH Circuit Malfunction
- DTC B1620/21 Driver Side - Side Airbag Sensor Circuit Malfunction
- DTC B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction
- DTC B1630/23 Driver Side Rear Airbag Sensor Circuit Malfunction
- DTC B1635/24 Front Passenger Side Rear Airbag Sensor Circuit Malfunction
- DTC B1650/32 Occupant Classification System Malfunction
- DTC B1653/35 Seat Position Airbag Sensor Circuit Malfunction
- DTC B1655/37 Driver Side Seat Belt Buckle Switch Circuit Malfunction
- DTC B1660/43 Passenger Airbag ON / OFF Indicator Circuit Malfunction
- DTC B1662/45 Indicator Light Circuit Malfunction
- DTC B1800/51 Short in Driver Side Squib Circuit; DTC B1801/51 Open in Driver Side Squib Circuit; DTC B1802/51 Short to GND in Driver Side Squib Circuit; DTC B1803/51 Short to B+ in Driver Side Squib Circuit
- DTC B1805/52 Short in Front Passenger Side Squib Circuit; DTC B1806/52 Open in Front Passenger Side Squib Circuit; DTC B1807/52 Short to GND in Front Passenger Side Squib Circuit; DTC B1808/52 Short to B+ in Front Passenger Side Squib Circuit
- DTC B1810/53 Short in Driver Side Squib 2nd Step Circuit; DTC B1811/53 Open in Driver Side Squib 2nd Step Circuit; DTC B1812/53 Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813/53 Short to B+ in Driver Side Squib 2nd Step Circuit
- DTC B1815/54 Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54 Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54 Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54 Short to B+ in Front Passenger Side Squib 2nd Step Circuit
- DTC B1820/55 Short in Front Driver Side - Side Squib Circuit; DTC B1821/55 Open in Front Driver Side - Side Squib Circuit; DTC B1822/55 Short to GND in Front Driver Side - Side Squib Circuit; DTC B1823/55 Short to B+ in Front Driver Side - Side Squib Circuit
- DTC B1825/56 Short in Front Passenger Side - Side Squib Circuit; DTC B1826/56 Open in Front Passenger Side - Side Squib Circuit; DTC B1827/56 Short to GND in Front Passenger Side - Side Squib Circuit; DTC B1828/56 Short to B+ in Front Passenger Side - Side Squib Circuit
- DTC B1830/57 Short in Driver Side Curtain Shield Squib Circuit; DTC B1831/57 Open in Driver Side Curtain Shield Squib Circuit; DTC B1832/57 Short to GND in Driver Side Curtain Shield Squib Circuit; DTC B1833/57 Short to B+ in Driver Side Curtain Shield Squib Circuit
- DTC B1835/58 Short in Front Passenger Side Curtain Shield Squib Circuit; DTC B1836/58 Open in Front Passenger Side Curtain Shield Squib Circuit; DTC B1837/58 Short to GND in Front Passenger Side Curtain Shield Squib Circuit; DTC B1838/58 Short to B+ in Front Passenger Side Curtain Shield Squib Circuit
- DTC B1900/73 Short in Front Driver Side Pretensioner Squib Circuit; DTC B1901/73 Open in Front Driver Side Pretensioner Squib Circuit; DTC B1902/73 Short to GND in Front Driver Side Pretensioner Squib Circuit; DTC B1903/73 Short to B+ in Front Driver Side Pretensioner Squib Circuit
- DTC B1905/74 Short in Front Passenger Side Pretensioner Squib Circuit; DTC B1906/74 Open in Front Passenger Side Pretensioner Squib Circuit; DTC B1907/74 Short to GND in Front Passenger Side Pretensioner Squib Circuit; DTC B1908/74 Short to B+ in Front Passenger Side Front Pretensioner Squib Circuit
- SRS Warning Light Remains ON
- SRS Warning Light does not Come ON
- TC and CG Terminal Circuit
- Occupant Classification System
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Initialization
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- DTC Check / Clear
- Data List / Active Test
- Diagnostic Trouble Code Chart
- DTC B1771 Passenger Side Buckle Switch Circuit Malfunction
- DTC B1780 Front Occupant Classification Sensor LH Circuit Malfunction
- DTC B1781 Front Occupant Classification Sensor RH Circuit Malfunction
- DTC B1782 Rear Occupant Classification Sensor LH Circuit Malfunction
- DTC B1783 Rear Occupant Classification Sensor RH Circuit Malfunction
- DTC B1785 Front Occupant Classification Sensor LH Collision Detection
- DTC B1786 Front Occupant Classification Sensor RH Collision Detection
- DTC B1787 Rear Occupant Classification Sensor LH Collision Detection
- DTC B1788 Rear Occupant Classification Sensor RH Collision Detection
- DTC B1790 Center Airbag Sensor Assembly Communication Circuit Malfunction
- DTC B1793 Occupant Classification Sensor Power Supply Circuit Malfunction
- DTC B1794 Open in Occupant Classification ECU Battery Positive Line
- DTC B1795 Occupant Classification ECU Malfunction
- DTC B1796 Sleep Operation Failure of Occupant Classification ECU
- Trouble in Passenger Airbag ON / OFF Indicator
- Steering Pad
- Spiral Cable
- FRONT PASSENGER AIRBAG ASSEMBLY (for Sedan)
- FRONT PASSENGER AIRBAG ASSEMBLY (for Hatchback)
- CURTAIN SHIELD AIRBAG ASSEMBLY (for Sedan)
- CURTAIN SHIELD AIRBAG ASSEMBLY (for 5 Door)
- CURTAIN SHIELD AIRBAG ASSEMBLY (for 3 Door)
- Front Seat Side Airbag Assembly
- CENTER AIRBAG SENSOR ASSEMBLY (for Sedan)
- CENTER AIRBAG SENSOR ASSEMBLY (for Hatchback)
- FRONT AIRBAG SENSOR (for Sedan)
- FRONT AIRBAG SENSOR (for Hatchback)
- SIDE AIRBAG SENSOR (for Sedan)
- SIDE AIRBAG SENSOR (for 5 Door)
- SIDE AIRBAG SENSOR (for 3 Door)
- REAR AIRBAG SENSOR (for Sedan)
- REAR AIRBAG SENSOR (for 5 Door)
- REAR AIRBAG SENSOR (for 3 Door)
- Seat Position Sensor
- Occupant Classification Ecu
Factory Service Tools
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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.
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