9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
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Roll Bar Position Switch: Description and Operation
Microswitch, Protective Bow Unit Lower, Left (742LH)
Microswitch, Protective Bow Unit Lower, Left (742LH)
Main function
The microswitch sends information to the STC control module that the left protective bow is in its down position.
Type
The microswitch contains a single-pole switch and two parallel-connected resistors.
Connection
Pin No. 2 - 3
Connected with 2 leads, ground and signal output. Pin 3 is grounded through connector H10-7 to grounding point G48 and pin 2 is connected to the STC
control module. With the switch open (left protective bow in lower position), a resistance is connected in series to ground, and with the switch closed
(left protective bow not in its lower position), both resistances are connected in parallel to ground.
Input from sensor is connected to a circuit where the supply is B+ through a resistor of 1 kohm. This means that the voltage to the AD converter gives
information to open the closed switch and whether there is a short circuit/break in the circuit.
The voltage value from the switch is A/D converted and is then available in digital form.
