ensure the correct injectors are on the correct drivers. On the CD are drawings for this injector
wiring.
4.5.6 Micro Fueling Injector
The ECU allows for the use of dual injectors per cylinder as explained in the Setup. Wiring is done
in two ways which differ also with the firmware loaded into the ECU.
If it is set to Driver, then the ECU has drivers available to operate the extra injectors. Then they
are connected in the same manner as the primary injector. This system is only available for four
cylinder engines with wasted spark coils. Then there are two injectors spare that can be used. See
the Micro Fueling Drawing supplied on CD.
If it is set to GP 1 or 2 then they are tied into the primary injector on the negative pins. Then their
positive pins is powered vie a separate Mosfet on the positive pins. See the Micro Fueling Drawing
supplied on CD.
4.6 Sensors
There are three groups of sensors for crank angle sensing. Magnetic, Hall and Optic sensors. Hall
and optic sensors both give a square wave output and are treated exactly the same. They have
electronic components in the sensor which convert the signals to square wave. The Hall sensor
uses magnetic field where optic uses infrared light. In both cases a beam is broken and detected.
Magnetic sensors are just a magnetic coil around a magnet. The metal point passing this sensor
induces a spike which has then to be converted to a square wave so that the processor can work
with it. On the TITAN ECU the all the sensors use the same inputs. They have different supply
voltages which is selectable with jumpers on the PC Board. See the drawing for correct settings.
4.6.1 Magnetic sensors
1. These sensors provide only a voltage spike to the ECU. The ECU will convert this spike to
a usable square wave to be used by the micro processor.
2. Each sensor has its own positive and negative wire from the ECU. Do not connect
magnetic sensors with common ground wires. The negative is connected to 5V and will
damage the ECU if connected to ground. Disconnect and isolate it first.
3. Make sure that the positives and negatives of the sensors are connected correctly.
Changing them around will retard the timing with revs or may cause the ECU to miss or
backfire.
4. The ECU has an extra pull-up resistor of 2.2KOhm set with the jumper which can be set to
reduce interference.
5. In certain cases a 1 K ohm resistor may be connected between positive and negative to
reduce spikes in the signal.
6. Connect the screened cables from the ECU as close to the sensor as possible. Do not let
single open wires run along the spark plug wires or the coils as this will induce interference
in the ECU causing erratic firing.
7. Do not connect the screen to the engine. It is already connected to the body at the ECU.
8. Do not connect other devices to this pickup as it will interfere with the signal to the ECU.
Testing a Magnetic sensor
These sensors have a wired coil with a magnet. They normally have two wires. Some do have 3
wires which have an earth which is not connected to the coil. The Coil resistance vary from 150
ohm to 1200 ohm typically. If you swap the tester wires around you would measure the same
resistance value. To test for positive put the meter on milli volts DC. Connect the wires to the coil
of the sensor. Move an iron object to the sensor and look closely at the polarity indicator. If it
indicate positive when moving closer to the sensor and negative when moving away from the
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