4. Interconnection
81
031-132-B0-001 Rev. A
TM
©2000
4.3 Connectors, continued
Pin Description Function
1 +12V Ignition Battery Ignition battery Fused 12V from APU
2 Neg Ignition Battery Ignition Battery Negative from APU
3 Low Oil Pressure Active LOW signal denotes Low Oil Pressure.
4 Over-Temp Active LOW signal indicates Over-Temp.
5 Start Command Active LOW from ECM activates APU START
relay.
6 Common (Start Stop) Common return between Start and Stop relays.
7 Stop Command Active LOW from ECM activates APU STOP
relay.
8 Over-Speed Active LOW signal denotes engine RPM was
exceeded.
9 Over-Crank Active LOW signal denotes Over Crank Limit is
reached.
10 Engine Run Active LOW signal denotes the Engine is
running.
11 Not Used
12 Not Used
4.3.15 ECM - APU Control Interface
The interface control is a 12-pin (2x6 row) Mini Mate-N-Lok style connector.
See Fig. 4-9, item 12 for location.
Fig.4-16 APU Control Interface
