B1775
DTC B1774 Pressure Sensor Circuit MalfunctionDTC B1775 Pressure Sensor Power Source Circuit Malfunction
DESCRIPTION
DTC Detection Condition:
The pressure sensor circuit consists of the occupant classification ECU and the occupant classification sensor.
The occupant classification sensor sends the pressure signal to the occupant classification ECU to control the occupant classification system.
DTCs B1774 and B1775 are recorded when a malfunction is detected in the pressure sensor circuit.
NOTE: Replace the occupant classification ECU, occupant classification sensor, seat cushion cover pad, seat cushion cover and seat cushion seat heater as a 5 part set (see supply set part no.).
HINT:
- When DTC B1650/32 is detected as a result of troubleshooting the supplemental restraint system, check the DTCs stored in the occupant classification ECU, and perform troubleshooting for those DTCs first.
- Use the intelligent tester to check for DTCs of the occupant classification ECU, otherwise the DTC cannot be read.
Wiring Diagram:
INSPECTION PROCEDURE
HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installation bolts to see the undersurface of the seat cushion.
- In the above case, hold the seat so that it does not tip over. Holding the seat up for a long period of time may cause problems, such as seat rail deformation. Hold the seat up only for as long as necessary.
- After performing the zero point calibration, check for DTCs to confirm that the calibration is completed normally. (If it fails, DTC B1797 will be output.)
Step 1:
Step 1 (Continued)-2:
Step 3-4:
Step 5-6:
Step 7-8:
