Product Info
Manual 2K7959760A
Date: 07/23/2020 version 0.2 page2 of 3
1.1.3 Error conditions
The device can not detect faulty state of belt buckle, the analog value is not measured at the
entrance, there is only detected a logic signal. The device detects error state values at the inputs to
determine the seat occupancy. The following error conditions are detected:
Table1 Limit values of the sitting sensor
error signal
value
tolerance
description
delivery status
After switching on the device, the value is
not read (not used in practice)
Low resistance value
R <60 Ω
60 ± 4 Ω
The wires are connected or shorted to
GND
Seat occupied
60 Ω <= R <= 250 Ω
60 ± 4 Ω
250 ± 8 Ω
Correct value is expected
Average resistance
value
Is not used
unexpected invalid resistance
Vacant seat
250 Ω <R <= 620 Ω
250 ± 8 Ω
620 ± 15 Ω
Expected valid value
High resistance value
R> 620 Ω
620 ± 15 Ω
Wires broken or high resistance
Image2 Error detection algorithm on the input of the occupied seat