Pressure-Side Impact Sensor and Side Impact Sensor are installed in the left and the right side of front door and in the lower of B-pillar respectively.
The Pressure-Side Impact Sensor senses an impact based on an acceleration at crashing.
Unlike the conventional acceleration sensor, the Pressure Sensor senses an air pressure by a distorted door at crashing and measures an impact.
The SCM detects the impact signals of the Pressure-Side Impact Sensor and Side Impact Sensor and compares with signals of the safe sensor inside. If the signals of all sensors are judged as a collision, the side-airbag and the curtain-airbag would be unfolded.
At inspecting the pressure sensor, keep the door airtight for an exact measuring.
The SRSCM sets DTC B173900 if there is any fault in Pressure-Side Impact(Driver)Sensor circuit.
Item
Detecting Condition
Possible cause
DTC Strategy
Check Data
Faulty Pressure-Side Impact(Driver) Sensor circuit.
Faulty Pressure-Side Impact(Driver) Sensor.
Faulty SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
Pressure-Side Impact Sensor send defect code
Pressure-Side Impact Sensor output is not expected value
Diagnostic
Time
Qualification
More than 1 sec
De-Qualification
More than 2 sec