DESCRIPTION
The passenger side buckle switch circuit consists of the occupant detection ECU and front seat inner belt assembly RH.
DTC B1771 is stored when a malfunction is detected in the passenger side buckle switch circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1771 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger side buckle switch circuit. Passenger side buckle switch malfunction Occupant detection ECU malfunction | Front seat wire RH Front seat inner belt assembly RH (Passenger side buckle switch) Occupant detection ECU |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1771 is output, perform troubleshooting for the DTC.
Scheme 334
The front occupant classification sensor LH circuit consists of the occupant detection ECU and front occupant classification sensor LH.
DTC B1780 is stored when a malfunction is detected in the front occupant classification sensor LH circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1780 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front occupant classification sensor LH circuit. Front occupant classification sensor LH malfunction | Front seat wire RH Front seat cushion spring assembly (Front occupant classification sensor LH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1780 is output, perform troubleshooting for the DTC.
Scheme 335
The front occupant classification sensor RH circuit consists of the occupant detection ECU and front occupant classification sensor RH.
DTC B1781 is stored when a malfunction is detected in the front occupant classification sensor RH circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1781 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front occupant classification sensor RH circuit. Front occupant classification sensor RH malfunction | Front seat wire RH Front seat cushion spring assembly (Front occupant classification sensor RH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1781 is output, perform troubleshooting for the DTC.
Scheme 336
The rear occupant classification sensor LH circuit consists of the occupant detection ECU and rear occupant classification sensor LH.
DTC B1782 is stored when a malfunction is detected in the rear occupant classification sensor LH circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1782 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the rear occupant classification sensor LH circuit. Rear occupant classification sensor LH malfunction | Front seat wire RH Front seat cushion spring assembly (Rear occupant classification sensor LH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1782 is output, perform troubleshooting for the DTC.
Scheme 337
The rear occupant classification sensor RH circuit consists of the occupant detection ECU and rear occupant classification sensor RH.
DTC B1783 is stored when a malfunction is detected in the rear occupant classification sensor RH circuit.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| B1783 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the rear occupant classification sensor RH circuit. Rear occupant classification sensor RH malfunction | Front seat wire RH Front seat cushion spring assembly (Rear occupant classification sensor RH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1783 is output, perform troubleshooting for the DTC.
Scheme 338
DTC B1785 is stored when the occupant detection ECU receives a collision detection signal sent by the front occupant classification sensor LH if an accident occurs.
DTC B1785 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.
If the vehicle is not in a collision, but the occupant detection ECU outputs a collision detection signal and sets DTC B1785, the DTC can be cleared by performing Zero Point Calibration and Sensitivity Check.
Therefore, if DTC B1785 is output, first perform Zero Point Calibration and Sensitivity Check.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1785 | Front occupant classification sensor LH sensed large load Front seat cushion spring assembly malfunction | Front seat cushion spring assembly (Front occupant classification sensor LH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1785 is output, perform troubleshooting for the DTC.
DTC B1786 is stored when the occupant detection ECU receives a collision detection signal sent by the front occupant classification sensor RH if an accident occurs.
DTC B1786 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.
If the vehicle is not in a collision, but the occupant detection ECU outputs a collision detection signal and sets DTC B1786, the DTC can be cleared by performing Zero Point Calibration and Sensitivity Check.
Therefore, if DTC B1786 is output, first perform Zero Point Calibration and Sensitivity Check.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1786 | Front occupant classification sensor RH sensed large load Front seat cushion spring assembly malfunction | Front seat cushion spring assembly (Front occupant classification sensor RH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1786 is output, perform troubleshooting for the DTC.
DTC B1787 is stored when the occupant detection ECU receives a collision detection signal sent by the rear occupant classification sensor LH if an accident occurs.
DTC B1787 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.
If the vehicle is not in a collision, but the occupant detection ECU outputs a collision detection signal and sets DTC B1787, the DTC can be cleared by performing Zero Point Calibration and Sensitivity Check.
Therefore, if DTC B1787 is output, first perform Zero Point Calibration and Sensitivity Check.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1787 | Rear occupant classification sensor LH sensed large load Front seat cushion spring assembly malfunction | Front seat cushion spring assembly (Rear occupant classification sensor LH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1787 is output, perform troubleshooting for the DTC.
DTC B1788 is stored when the occupant detection ECU receives a collision detection signal sent by the rear occupant classification sensor RH if an accident occurs.
DTC B1788 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident does not occur.
If the vehicle is not in a collision, but the occupant detection ECU outputs a collision detection signal and sets DTC B1788, the DTC can be cleared by performing the Zero Point Calibration and Sensitivity Check.
Therefore, if DTC B1788 is output, first perform Zero Point Calibration and Sensitivity Check.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1788 | Rear occupant classification sensor RH sensed large load Front seat cushion spring assembly malfunction | Front seat cushion spring assembly (Rear occupant classification sensor RH) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1788 is output, perform troubleshooting for the DTC.
The airbag sensor assembly communication circuit consists of the occupant detection ECU and airbag sensor assembly.
DTC B1790 is stored when a malfunction is detected in the airbag sensor assembly communication circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1790 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the airbag sensor assembly communication circuit. Occupant detection ECU malfunction Airbag sensor assembly malfunction | No. 2 floor wire Front seat wire RH Occupant detection ECU Airbag sensor assembly |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1790 is output, perform troubleshooting for the DTC.
Scheme 339
The occupant classification sensor power supply circuit consists of the occupant detection ECU and occupant classification sensors.
DTC B1793 is stored when a malfunction is detected in the occupant classification sensor power supply circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1793 | The occupant detection ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the occupant classification sensor power supply circuit. Front occupant classification sensor LH malfunction Front occupant classification sensor RH malfunction Rear occupant classification sensor LH malfunction Rear occupant classification sensor RH malfunction | Front seat wire RH Front seat cushion spring assembly (4 occupant classification sensors) |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1793 is output, perform troubleshooting for the DTC.
Scheme 340
DTC B1794 is stored when a malfunction is detected in the occupant detection ECU auxiliary battery positive line.
| DTC No. | DTC Detections Conditions | Trouble Areas |
|---|---|---|
| B1794 | The occupant detection ECU receives an open circuit signal in the occupant detection ECU auxiliary battery positive line. Occupant detection ECU malfunction | Auxiliary battery ECU-B fuse Wire harness Occupant detection ECU |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1794 is output, perform troubleshooting for the DTC.
Scheme 341
DTC B1795 is stored when a malfunction is detected in the occupant detection ECU.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1795 | Occupant detection ECU malfunction | Occupant detection ECU |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1795 is output, perform troubleshooting for the DTC.
In sleep mode, the occupant detection ECU reads the condition of each sensor while the power switch is off.
In this mode, if the occupant detection ECU detects an internal malfunction, DTC B1796 is stored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1796 | Occupant detection ECU malfunction | Occupant detection ECU |
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1796 is output, perform troubleshooting for the DTC.
The occupant classification system detects the front passenger seat condition. It then displays the front passenger airbag, front passenger side knee airbag and front seat belt pretensioner RH condition (activated/not activated) using the passenger airbag ON/OFF indicator.
HINT
Approximately 6 seconds after the power switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the conditions listed below.
| Front Passenger Seat Condition | Passenger Airbag ON/OFF Indicator | SRS Warning Light | |
|---|---|---|---|
| ON Indicator | OFF Indicator | ||
| Vacant | OFF | OFF | OFF |
| Adult is seated. | ON | OFF | OFF |
| Child is seated. | OFF | ON | OFF |
| Child restraint system is installed. | OFF | ON | OFF |
| Occupant classification system failure | OFF | ON | ON |