Pressure-Side Impact Sensor and Rear Side Impact Sensor are installed in the left and the right side of front door and in the lower of C-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 Rear 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 B1746 if there is a short to ground in Pressure-Side Impact(Passenger) harness.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
Check voltage |
•
Short to ground in Pressure-Side Impact(Passenger) harness.
•
Faulty Pressure-Side Impact.
•
Faulty SRSCM. | |
Enable Conditions |
•
Ignition "ON" | ||
Threshold Value |
•
Pressure-Side Impact no acceleration data, and line voltage < 3V | ||
Diagnostic Time | Qualification |
•
Ini(Start Up):2.1s (2 times)
•
Steady:500μs x 8 + 2.2s (2 times) | |
De-Qualification |
•
Ini(Start Up):1 time
•
Steady:1 time | ||
