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APPLICATION #6 ()
Convert a 4000ppm signal from an OEM transmission speed sensor or ECM output to an 8000ppm
signal for an aftermarket speedometer.
The speed sensors have a two-pin connector on the transmission or transfer case. One of the
pins will be a ground and the other will be the signal. The ground pin will go the GROUND terminal
along with the ground wire. The signal pin will go to the SIGNAL IN terminal. It is best to twist the
signal and ground wires from the sensor around each other. This helps eliminate any electrical
interference. If nothing else is connected to the speed sensor it does not matter which pin is used as
the ground. If you are picking up a signal coming out of the ECM there will be only one wire to the
SIGNAL IN. Connect the POWER terminal to accessory power and the GROUND terminal to
ground. The CAL ratio should be set to 2.000 as a starting point. Connect OUT1 to your aftermarket
electric speedometer.
APPLICATION #7 ()
Convert a 8000ppm or 16000ppm signal from a cable drive speed sensor to a 128000ppm signal for
an OEM speedometer or ECM.
Either two wire or three wire sensors can be recalibrated with this unit. Two wire sensors will
typically have one wire as a ground and the other as the signal. Three wire sensors will have an
additional power wire. You must first determine which wire is the signal. The signal wire will be
tapped into so the SGI-5 E can read it. The sensor signal wire will go to the SIGNAL IN terminal.
Connect the POWER terminal to a 12-volt accessory wire and connect the GROUND terminal to a
good ground location. If nothing else is connected to a two wire sensor, then connect one wire to the
GROUND terminal also. The output connections will depend on your particular application. With an
8000ppm signal the CAL ratio can start out at 1.00. If starting with a 16000ppm signal the CAL
ratio should be set to 0.500 as a starting point. Here are some typical examples:
OUT3, 128000ppm AC:
OUT4, 128000ppm oc:
12V Accessory Power
GROUND
Sensor ground (if needed)
Sensor 5V power (if needed)
most common if OEM sensor connected to ECM direclty
most common if an ECM was fed by another electronic module
Speed input signal
SGI-5 E
+
ppm values listed
below are only valid
after calibration is
-
complete
8
128000 ppm 'oc' output
128000 ppm 'AC' output
MAN# 650528 rev. B
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