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 246
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 Occupant detection ECU malfunction | Front seat wire RH Front seat adjuster assembly RH (Rear occupant classification sensor LH) 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 B1782 is output, perform troubleshooting for the DTC.
Scheme 247
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 Occupant detection ECU malfunction | Front seat wire RH Front seat adjuster assembly RH (Rear occupant classification sensor RH) 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 B1783 is output, perform troubleshooting for the DTC.
Scheme 248
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 was not in a collision, but the occupant detection ECU receives a collision detection signal and stores 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 adjuster assembly RH malfunction | Front seat adjuster assembly RH (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 was not in a collision, but the occupant detection ECU receives a collision detection signal and stores 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 adjuster assembly RH malfunction | Front seat adjuster assembly RH (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 center 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 center 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 center 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 249
The occupant classification sensor power supply circuit consists of the occupant detection ECU and rear 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, a short circuit to ground signal or a short circuit to B+ signal in the occupant classification sensor power supply circuit. Rear occupant classification sensor LH malfunction Rear occupant classification sensor RH malfunction Occupant detection ECU malfunction | Front seat wire RH Front seat adjuster assembly RH (2 rear occupant classification sensors) 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 B1793 is output, perform troubleshooting for the DTC.
Scheme 250
DTC B1794 is stored when a malfunction is detected in the occupant detection ECU 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 battery positive line. Occupant detection ECU malfunction | Battery 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 251
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 engine 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 and front passenger side knee airbag condition (activated/not activated) using the passenger airbag ON/OFF indicator.
HINT
Approximately 6 seconds after the engine 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 | ON | OFF |
| Adult is seated. | ON | OFF | OFF |
| Child is seated. | OFF | ON | OFF |
| Child restraint system is installed. | |||
| Occupant classification system failure | OFF | ON | ON |