Diagnostic Trouble Code Chart
WARNING: This page is about a different car, the 2010 Lexus LS 460L and 2010 Lexus LS 460. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- When DTC B1650/32 is detected 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 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 Indicator) | Refer To |
|---|---|---|---|---|
| B1771 | Passenger Side Buckle Switch Circuit Malfunction | - Front seat wire RH - Front seat inner belt RH (passenger side buckle switch) - Front seat set (occupant classification ECU) |
ON | Refer to DTC B1771: Passenger Side Buckle Switch Circuit Malfunction |
| B1773 | Belt Tension Sensor Circuit Malfunction | - Front seat wire RH - Front seat outer belt RH (seat belt tension sensor) - Front seat set (occupant classification ECU) |
ON | Refer to DTC B1773: Belt Tension Sensor Circuit Malfunction; DTC B1776: Seat Belt Tension Sensor Power Source Circuit Malfunction |
| B1774 | Pressure Sensor Circuit Malfunction | - Front seat wire RH - Front seat set (occupant detection sensor) |
ON | Refer to DTC B1774: Pressure Sensor Circuit Malfunction; DTC B1775: Pressure Sensor Power Source Circuit Malfunction |
| B1775 | Pressure Sensor Power Source Circuit Malfunction | - Front seat wire RH - Occupant detection sensor - Front seat set (occupant classification ECU) |
ON | Refer to DTC B1774: Pressure Sensor Circuit Malfunction; DTC B1775: Pressure Sensor Power Source Circuit Malfunction |
| B1776 | Seat Belt Tension Sensor Power Source Circuit Malfunction | - Front seat wire RH - Front seat outer belt RH - Front seat set (occupant classification ECU) |
ON | Refer to DTC B1773: Belt Tension Sensor Circuit Malfunction; DTC B1776: Seat Belt Tension Sensor Power Source Circuit Malfunction |
| B1790 | Center Airbag Sensor Assembly Communication Circuit Malfunction | - Floor wire - Front seat wire RH - Front seat set (occupant classification ECU) - Center airbag sensor |
ON | Refer to DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction |
| B1795 | Occupant Classification ECU Malfunction | Front seat set (occupant classification ECU) | ON | Refer to DTC B1795: Occupant Classification ECU Malfunction |
| B1797 | Calibration Malfunction | -There is no malfunction if this DTC is not output again after performing occupant classification system zero point calibration - Front seat set (occupant detection sensor) |
ON | Refer to DTC B1797: Calibration Malfunction |