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Diagram from AEM
RED (Power) - Connect to a switched 10-18 volt power source utilizing a 10A fuse.
BLACK (Ground) - Connect to a clean power ground.
WHITE (Analog Output) - Connects to any Stand Alone ECU unit that accepts a 0-5 volt input.
BLUE (Serial Output)(optional hookup) - Connects to a RS-232 com port for hyper-terminal data logging.
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Diagram from SCT
Black - General Ground
Orange - Analog Input #1
Blue - Analog Input Ground #1
Red - Analog Input #2
Green - Analog Input Ground #2
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Connect AEM White to SCT Orange | Connect AEM Black to Vehicle Ground and SCT BLUE
AEM Wideband Formula in Air Fuel Ratio = (v*2)+10
AEM Wideband Formula in Lambda = (v*0.078557)+0.751
If you have any ground offsets, add or subtract them from the voltage (v). For example, for a .125 voltage offset, ((v-.125)*2)+10. Your gauge should match the reading on the tuner/livelink exactly.
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