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15 ecm - apu control interface, Interconnection – Alpha Technologies AlphaGen 5.0kW Auxiliary Power Unit User Manual

Page 81

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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.

E#

5($5

Г

9,(:

:,5(

Г

6,'(

5($5
9,(:

Fig.4-16 APU Control Interface