Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJRN
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: DIAGNOSTIC TROUBLE CODE CHART; 2016 - 2020 MY Sienna [12/2015 -        ]

DIAGNOSTIC TROUBLE CODE CHART

HINT:

  • When DTC B1650/32 is detected as a result of troubleshooting for "Airbag System", perform troubleshooting for "Occupant Classification System" as shown in the chart below.
  • Use the Techstream to read and clear the DTC 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)

See page

B1771

Passenger Side Buckle Switch Circuit Malfunction

- Front seat wire RH

- Front seat inner belt assembly RH (Passenger side buckle switch)

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1771; Passenger Side Buckle Switch Circuit Malfunction

B1780

Front Occupant Classification Sensor LH Circuit Malfunction

- Front seat assembly RH (Front occupant classification sensor LH)

- Front seat wire RH

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1780; Front Occupant Classification Sensor LH Circuit Malfunction

B1781

Front Occupant Classification Sensor RH Circuit Malfunction

- Front seat assembly RH (Front occupant classification sensor RH)

- Front seat wire RH

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1781; Front Occupant Classification Sensor RH Circuit Malfunction

B1782

Rear Occupant Classification Sensor LH Circuit Malfunction

- Front seat assembly RH (Rear occupant classification sensor LH)

- Front seat wire RH

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1782; Rear Occupant Classification Sensor LH Circuit Malfunction

B1783

Rear Occupant Classification Sensor RH Circuit Malfunction

- Front seat assembly RH (Rear occupant classification sensor RH)

- Front seat wire RH

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1783; Rear Occupant Classification Sensor RH Circuit Malfunction

B1785

Front Occupant Classification Sensor LH Collision Detection

Front seat assembly RH (Front occupant classification sensor LH)

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1785; Front Occupant Classification Sensor LH Collision Detection

B1786

Front Occupant Classification Sensor RH Collision Detection

Front seat assembly RH (Front occupant classification sensor RH)

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1786; Front Occupant Classification Sensor RH Collision Detection

B1787

Rear Occupant Classification Sensor LH Collision Detection

Front seat assembly RH (Rear occupant classification sensor LH)

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1787; Rear Occupant Classification Sensor LH Collision Detection

B1788

Rear Occupant Classification Sensor RH Collision Detection

Front seat assembly RH (Rear occupant classification sensor RH)

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1788; Rear Occupant Classification Sensor RH Collision Detection

B1790

Center Airbag Sensor Assembly Communication Circuit Malfunction

- No. 2 floor wire

- Front seat wire RH

- Occupant classification ECU

- Center airbag sensor assembly

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1790; Center Airbag Sensor Assembly Communication Circuit Malfunction

B1793

Occupant Classification Sensor Power Supply Circuit Malfunction

- Front seat assembly RH (Occupant classification sensors)

- Front seat wire RH

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1793; Occupant Classification Sensor Power Supply Circuit Malfunction

B1794

Open in Occupant Classification ECU Battery Positive Line

- Front seat wire RH

- Harness or connector

- Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1794; Open in Occupant Classification ECU Battery Positive Line

B1795

Occupant Classification ECU Malfunction

Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1795; Occupant Classification ECU Malfunction

B1796

Sleep Operation Failure of Occupant Classification ECU

Occupant classification ECU

ON

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1796; Sleep Operation Failure of Occupant Classification ECU