Nitrous Express ELECTRONIC FUEL INJECTED C7 PLATE SYSTEM - Manual (Page 6)

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throttle at Idle. The unit is now calibrating the idle position and making sure that the idle signal is stable.
Wait for both LED’s to turn off.
8. Now move throttle to wide open and hold for 1 second, then release back to idle (Red LED should
come on to indicate that its working and waiting to check the calibration).
9. To check the calibration, move throttle to wide open again and then release to idle a second time. Once
the check is complete, the Red LED will turn off and the Green LED will turn on indicating that the unit
is calibrated and armed.
10. Once calibrated, the unit will activate the relay when the throttle opens to 90% or more and it will
remain on as long as the throttle is between 90% and 100%. (When the relay is activated, both the red and
green LEDs will be on). When the throttle closes to less than 90%, the unit will turn the relay and the red
LED off. The green LED will remain on indicating that the unit is re-armed and ready for the next run.
11. If at any time during the calibration process the green and red LED’s flash rapidly in an alternating
pattern that means the calibration was not completed correctly. This can be the result of one of two things.
Either the throttle was moved while it was calibrating the idle position or the TPS signal is not stable.
Check wiring and recalibrate.
PROGRAMMING A TPS WIDE OPEN THROTTLE SWITCH WITH ONE LED
The TPAS is designed to trigger a relay, 1 amp maximum current draw, at or near wide open throttle and
automatically calibrates itself to work with rising or falling signal.
1. The NX TPS may be installed inside or under the hood. Mount the unit in
a place so access the learn button and view the LEDs. Make sure the unit is located away from any heat
source, i.e. exhaust manifold, header, or EGR.
2. Following the wiring diagram, route all wires but make no connections.
3. You must determine which wire on your vehicle’s TPS is the output signal to the vehicles computer.
Refer to your vehicle’s service manual to determine which is the output wire. Connect all the wires as
shown in the diagram. When the switch is wired you will need to turn the key to the on position, it is not
necessary to start the vehicle. Now if the switch has never been programmed the GREEN LED will blink
fast. If it has been programmed it will be ON. Either way the switch needs to put in learn mode.
4. This switch works with rising or falling TPS signal as long as it has at least a 1v deviation between idle
& wide open throttle. When in learn mode, the unit first does a 5 second idle signal analysis. If too much
signal noise is found, it flashes an error (this is to catch a bad TPS or when connected to wrong wire).
5. Once the switch is wired according to the schematic, you will need to put it in learn mode. Learn mode
is achieved by pushing and holding the button for 3 seconds, at which point the GREEN LED on the
switch will blink slow. This tells you it is checking the TPS idle voltage.This takes approx. 4 seconds. DO
NOT change the throttle position during this time. Once the GREEN LED turns off you can proceed.
6. Now take the vehicle to full throttle and back to idle two times. If the GREEN LED is ON solid, then
your TPS is set. If the GREEN LED is flashing, the TPS Switch detected a variation between the 1st and
2nd full throttle position and as a precaution, did not learn that setting. You will need to turn off the
switch and start the learn procedure again. If the GREEN LED is still OFF, the TPS signal range may be
too small or you have the switch connected to the wrong wire. NOTE: Once the switch has learned your