Haltech E6X Manual DOS Version - Manual (Page 15)

E6X Manual
15
Once a suitable position has been located for the air temperature sensor a hole should be
drilled and tapped to accept the sensor. Remove the manifold or inlet tract from the engine
before machining the sensor mount. Do not allow any metal particles to enter the inlet
manifold of the engine as these will be drawn into the engine and damage it. Wash all
components before reassembly.
1.3.4 The Throttle Position Sensor (TPS)
The throttle position sensor is mounted to the throttle butterfly shaft to measure its rotation. A
TPS is common on many late model engines and maybe compatible with the Haltech ECU, if
it is not, the Haltech sensor should attach with little or no modification. The throttle shaft
must protrude from the side of the throttle body. This may require the machining of the
throttle body or the manufacture of a new throttle shaft. The inner mechanism of the sensor
rotates with the shaft. If the shaft is round then file a flat surface on the shaft so that it will
pass through the sensor assembly. The TPS should be mounted against the side of the throttle
body, using two screws, such that the throttle shaft and the sensor mechanism can rotate
freely. The absolute range of sensor movement is not important as the sensor can be
calibrated using the programming software.
Your engine may have a Throttle position sensor already fitted and it is often possible to make
use of this TPS. The Haltech supplied TPS has a resistance value ranging from 0 to 10k
Ω
.
The resistance value of the installed TPS does not have to be the same since the ECU uses a
throttle calibration function to determine actual throttle position.
Note:
Be sure to wire the TPS so that The Engine Data page shows “0%” for throttle
position when the throttle is closed. (Refer to 6.1 Calibrating the Throttle
Position Sensor, p65)
Make sure that the axis of rotation of the shaft is exactly aligned with the axis
of rotation of the sensor. Also, do not use the TPS as a throttle stop. In either
case, the TPS will be damaged.