Diagnostic Trouble Code Chart
WARNING: This page is about a different car, the 2010 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- When DTC B1650/32 is stored as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system as shown in the chart below.
- Use the Techstream to read and clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be read and cleared.
OCCUPANT CLASSIFICATION SYSTEM
| DTC Code | Detection Item | Trouble Area | Passenger Airbag ON/OFF Indicator (OFF) | Refer To |
|---|---|---|---|---|
| B1771 | Passenger Side Buckle Switch Circuit Malfunction | - Front seat inner belt RH (Front passenger side buckle switch) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1771: Passenger Side Buckle Switch Circuit Malfunction |
| B1780 | Front Occupant Classification Sensor LH Circuit Malfunction | - Separate type front seat cushion spring RH (Front occupant classification sensor LH) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1780: Front Occupant Classification Sensor LH Circuit Malfunction |
| B1781 | Front Occupant Classification Sensor RH Circuit Malfunction | - Separate type front seat cushion spring RH (Front occupant classification sensor RH) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1781: Front Occupant Classification Sensor RH Circuit Malfunction |
| B1782 | Rear Occupant Classification Sensor LH Circuit Malfunction | - Separate type front seat cushion spring RH (Rear occupant classification sensor LH) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1782: Rear Occupant Classification Sensor LH Circuit Malfunction |
| B1783 | Rear Occupant Classification Sensor RH Circuit Malfunction | - Separate type front seat cushion spring RH (Rear occupant classification sensor RH) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1783: Rear Occupant Classification Sensor RH Circuit Malfunction |
| B1785 | Front Occupant Classification Sensor LH Collision Detection | - Separate type front seat cushion spring RH (Front occupant classification sensor LH) - Occupant classification ECU |
On | Refer to DTC B1785: Front Occupant Classification Sensor LH Collision Detection |
| B1786 | Front Occupant Classification Sensor RH Collision Detection | - Separate type front seat cushion spring RH (Front occupant classification sensor RH) - Occupant classification ECU |
On | Refer to DTC B1786: Front Occupant Classification Sensor RH Collision Detection |
| B1787 | Rear Occupant Classification Sensor LH Collision Detection | - Separate type front seat cushion spring RH (Rear occupant classification sensor LH) - Occupant classification ECU |
On | Refer to DTC B1787: Rear Occupant Classification Sensor LH Collision Detection |
| B1788 | Rear Occupant Classification Sensor RH Collision Detection | - Separate type front seat cushion spring RH (Rear occupant classification sensor RH) - Occupant classification ECU |
On | Refer to DTC B1788: Rear Occupant Classification Sensor RH Collision Detection |
| B1790 | Center Airbag Sensor Assembly Communication Circuit Malfunction | - Floor wire - Front seat wire RH - Occupant classification ECU - Center airbag sensor |
On | Refer to DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction |
| B1793 | Occupant Classification Sensor Power Supply Circuit Malfunction | - Separate type front seat cushion spring RH (Occupant classification sensors) - Front seat wire RH - Occupant classification ECU |
On | Refer to DTC B1793: Occupant Classification Sensor Power Supply Circuit Malfunction |
| B1794 | Open in Occupant Classification ECU Battery Positive Line | - Harness or connector - Occupant classification ECU |
On | Refer to DTC B1794: Open in Occupant Classification ECU Battery Positive Line |
| B1795 | Occupant Classification ECU Malfunction | Occupant classification ECU |
On | Refer to DTC B1795: Occupant Classification ECU Malfunction |
| B1796 | Sleep Operation Failure of Occupant Classification ECU | Occupant classification ECU |
On | Refer to DTC B1796: Sleep Operation Failure of Occupant Classification ECU |