Haltech IG5 - Manual (Page 16)

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1.3.4. The Throttle Position Sensor (TPS)
The throttle position sensor is mounted to the throttle butterfly shaft to sense its rotation. A TPS is
common on many late model engines and 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. 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. The
absolute range of sensor movement is not important as the sensor can be calibrated using the
programming software.
Note: If a Throttle Position Sensor is already fitted this sensor can often be
used instead of a Haltech supplied TPS. The rotary potentiometer in the
Haltech TPS has 10k Ω resistance value but the alternate TPS can have a
different value as the software allows calibration of the throttle input.
1.3.5. Mounting the Igniter
The igniter must be mounted on a flat surface (eg. the firewall) to ensure proper heat dissipation and
to avoid stress on the wiring connections. It is important to protect the module from overheating by
mounting it away from hot components such as exhaust manifolds and turbocharger's.
Included with the Bosch Ignition Module (the EB023 supplied by Haltech) is the ignition sub-
loom. This connects the Ignition module to the Main Harness. Locate this loom and connect
it to the ignition module but do not connect the ignition sub-loom to the main loom until
the ignition settings in the ECU are verified by connecting the ECU to a computer.
Connect the 3 flying leads of the ignition sub-loom. The black wire with the eye terminal is a ground
connection. This should NOT be grounded to the same point as the ECU to prevent ignition noise
getting into the power supply circuit of the ECU. The blue wire goes to the negative side of the coil.
The red wire should be supplied with 12 volts when the ignition is on. This can often be obtained
from the positive side of the coil.