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APEXi
S-AFC Installation by
Robert Pina 
SAFC
REFERENCE COLORS:
RED
- Ignition Power
GREEN
- RPM signal
BROWN
- Ground Wire closer to ECU
BLACK
- Ground Wire farther from ECU than brown wire
YELLOW
- Air Flow Signal wire going to ECU
WHITE
- Air Flow Signal from AFM/Pressure Sensor
BLUE
- Optional voltage input (o2 sensor mod)
ECU
LOCATION
Now
that you have all of the information, lets go over some key things to keep
in mind during the installation. This assumes you have the
documentation that came with the unit. If anyone has the OX pinout
for ST185 and ST205 please email me at robert@alltrac.net
-
Splice
the wires in according the pinouts above.
-
The
Air Flow wire from the harness to the ECU must be cut.
-
The
white wire goes to the wire coming from the engine bay.
-
The
yellow wire goes to the wire going to the ECU.
-
The
black and brown wires must be wired away from each other.
-
On
my installation I used RPM signal #1.
-
Once
installed turn the key on and check operation.
-
For
cylinders choose 4.
-
For
throttle choose the arrow pointing up.
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For
sensor type choose flap, in and out 2.
-
Start
the car and troubleshoot.
O2
Sensor Mod
By connecting the blue SAFC wire to the OX pinout on your ECU you will be
able to read o2 sensor voltage. This can be wonderful for more
accurate display of your o2 sensor reading. Typically on a generic
A/F gauge the lights are lit up for every 10th of a volt.
Example: If your o2 sensor voltage was .82, .80, or .86 it would
always light up the same light. Not until you hit .90 volt would the
next light be lit up. Yet on the S-AFC the voltage is displayed up
to 1/1000th of a volt. So you will get .812 voltage for
example. This type of display is hard to read but can provide
valuable information. To see the o2 sensor voltage go to the sensor
check screen under input 2. The voltage will bounce around when off
throttle, but will give you some good information under higher throttle
loads. Pictures
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