AirMan PDS185S-6C1, Service Manual, Page: 54 / 79

3. Electric System
3-22
[
Function of stop motor]
1. Before engine starts
PC08041E-1
①
As the ACC contact is open before starting engine, the exciting current is not provided, but
internal contact is as shown in fig a.
②
When the contact plate inside the stop motor assembly is positioned as shown in fig a, there is a
conduction between B terminal and P2 terminal. Accordingly, the voltage of the battery is applied
to No.5 terminal of stop motor relay.
2. Engine starts
PC08042E-1
①
When closing the ACC contact by handling the starter switch (“Operation” position), the circuit of
controller inside contact between CN1-8 terminal and CN1-4 terminal
→ stop motor relay No.1
terminal → exciting coil → stop motor relay No.2 terminal → grounding is formed and the stop
motor relay is excited. Accordingly, stop motor relay contact functions.
②
As the voltage of battery is already applied to the stop motor relay CN3-5, the circuit of stop
motor relay No.5 terminal
→ stop motor relay No.3 terminal → stop motor A terminal → motor →
grounding is formed and the motor starts.
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