User guide

Self-Programming Throttle Position Activation Switch (W/2 LEDs)
PN 15961
The NX TPAS is more durable and contains short circuit protection that other similar products do
not. The TPAS is designed to work with most domestic and import EFI vehicles. The NX 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. Unlike other currently available units, the NX TPAS may be installed under the hood. Mount the
unit in a place that it will be easy to 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 wire is the output wire.
4. Connect all wires per NX Self- Programming
Throttle Position Activation Switch wiring
diagram using a 1 to 3 amp fuse in series with the
red wire.
5. On initial power up, press and hold the button
while turning on switched +12 volts. The green
LED should begin flashing indicating that the unit
is not programmed.
6. Release the button.
7. With the throttle at pedal at idle position, press
and hold the button until the red LED comes on
(approximately 4 seconds). The green LED will
continue to flash. Release the button and leave the
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 (go to step 3).