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EM-5 Aviation System ECU Pinouts
DB25
Pin 1 Switched 12V power ECU, Red 20 ga.
2 TPS 5V
3 Knob 5V
4 MAP 5V
5 Future use, brown.
6 MAP signal
7 Air temp +
8 Coil trigger 8 cyl. Channel A
9 Coil trigger 4 cyl./6 cyl. Channel A, Channel C 8 cyl.
10 Coil trigger 6 cyl. Channel B, Channel D 8 cyl.
11 Coil trigger 4 cyl. Channel B, 6 cyl. Channel C, 8 cyl. Channel B
12 5V tach output, Green 20ga
13 Ignition advance/ LOP switch enable input, blue 20 ga.
14 Mixture knob ground
15 MAP ground
16 Air temp ground
17 Engine temp ground
18 ECU ground, black 20 ga.
19 Mixture knob signal
20 Engine temp +
21 TPS signal
22 12V tach output, yellow 20 ga.
23 Future use, purple, not used now, for future use.
24 O2 sensor input, gray 20 ga.
25 TPS ground
DB9 Hall Sensor
Pin 3 Ground
4 Trigger signal
5 +5V
8 Synch signal
Wire colors Sheathed Cable
2 conductor- White + or power, Blue ground
3 conductor- Orange + or power, White signal, Blue ground
4 conductor (Hall sensor) Orange +5V, White trigger signal, Blue ground, Green synch signal
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