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Diagnostic Trouble Code Chart

  1. If a trouble code is displayed during the DTC check, check the circuit listed for the code in the table below . 
    OCCUPANT CLASSIFICATION ECU

    DTC Code Detection Item Trouble Area Refer To
    B1771 Passenger Side Buckle Switch Circuit Malfunction 1. Front seat inner belt assembly RH (Buckle switch RH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1771: Passenger Side Buckle Switch Circuit Malfunction
    B1780 Front Occupant Classification Sensor LH Circuit Malfunction 1. Front seat with adjuster frame assembly RH (Front occupant classification sensor LH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1780: Front Occupant Classification Sensor LH Circuit Malfunction
    B1781 Front Occupant Classification Sensor RH Circuit Malfunction 1. Front seat with adjuster frame assembly RH (Front occupant classification sensor RH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1781: Front Occupant Classification Sensor RH Circuit Malfunction
    B1782 Rear Occupant Classification Sensor LH Circuit Malfunction 1. Front seat with adjuster frame assembly RH (Rear occupant classification sensor LH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1782: Rear Occupant Classification Sensor LH Circuit Malfunction
    B1783 Rear Occupant Classification Sensor RH Circuit Malfunction 1. Front seat with adjuster frame assembly RH (Front occupant classification sensor RH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1783: Rear Occupant Classification Sensor RH Circuit Malfunction
    B1785 Front Occupant Classification Sensor LH Collision Detection 1. Front seat with adjuster frame assembly RH (Front occupant classification sensor LH)
    2. Occupant classification ECU    		 Refer to DTC B1785: Front Occupant Classification Sensor LH Collision Detection
    B1786 Front Occupant Classification Sensor RH Collision Detection 1. Front seat with adjuster frame assembly RH (Front occupant classification sensor RH)
    2. Occupant classification ECU    		 Refer to DTC B1786: Front Occupant Classification Sensor RH Collision Detection
    B1787 Rear Occupant Classification Sensor LH Collision Detection 1. Front seat with adjuster frame assembly RH (Rear occupant classification sensor LH)
    2. Occupant classification ECU    		 Refer to DTC B1787: Rear Occupant Classification Sensor LH Collision Detection
    B1788 Rear Occupant Classification Sensor RH Collision Detection 1. Front seat with adjuster frame assembly RH (Rear occupant classification sensor RH)
    2. Occupant classification ECU    		 Refer to DTC B1788: Rear Occupant Classification Sensor RH Collision Detection
    B1793 Occupant Classification Sensor Power Supply Circuit Malfunction 1. Front seat with adjuster frame assembly RH (Occupant classification sensors)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1793: Occupant Classification Sensor Power Supply Circuit Malfunction
    B1794 Open in Occupant Classification ECU Battery Positive Line 1. Battery
    2. ECU-B Fuse
    3. Seat wire No. 1
    4. Occupant classification system    		 Refer to DTC B1794: Open in Occupant Classification ECU Battery Positive Line
    B1790 Center Airbag Sensor Assembly Communication Circuit Malfunction 1. Occupant classification ECU
    2. Center airbag sensor assembly
    3. Floor wire
    4. Seat wire No. 1    		 Refer to DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction
    B1795 Occupant Classification ECU Malfunction 1. Front seat inner belt assembly RH (Buckle switch RH)
    2. Occupant classification ECU
    3. Seat wire No. 1    		 Refer to DTC B1795: Occupant Classification ECU Malfunction
    B1796 Sleep Operation Failure of Occupant Classification ECU Occupant classification ECU Refer to DTC B1796: Sleep Operation Failure of Occupant Classification ECU
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