Throttle Position Sensor; Oil Temperature Sensor; Additional Wiring - Spitronics TCU Standard Manual

• Remember this is a guideline to black box testing and not a failsafe operation. Note point 4
above and rather consult the specifications from the manufacturer or vehicle diagrams.

4.4.3 Throttle Position Sensor

•
• This signal tells the TCU exactly what the driver is thinking.
• The TPS must operate through the whole range of the throttle movement to ensure that the
proper operation of the TCU.
• The TPS is normally connected to the Engine management. In this case only the signal wire
needs to be attached to the TPS signal. Do not connect the positive and negative onto the
ECU wires. This will damage the TCU or the ECU.
• The TPS must be calibrated in the PC software as to operate correctly. This is done in the
setup menu before starting the Transmission. (see TPS calibration under Active Sensors)
• The sensor is connected to 5V, ground and signal input. Connecting it wrong may damage
the TCU or TPS as you may short the 5V to ground. Test it before you connect it to the
TCU.
Testing a TPS for the Correct Pin-Outs
Throttle Position Sensor
Black / Screen
Blue
Red +5V
•
1. Test the resistance with an Ohm Meter between 2 pins at a time. Each time move the
throttle open and close. If the resistance do not change and is approx 5000 Ohm, then you
found pin A & C. The remaining pin is B which is the wiper. Mark it as B.
2. Now test the B pin with one of the other pins. If it is below 500 Ohms then that pin is C. If it
is above 4500 Ohm that pin is A.
3. Now to double check. Measure between B & C. if the throttle is closed the resistance is
below 500 Ohm. If you open the throttle the resistance increases to above 4500 Ohm.
4. If you measure between A & C the resistance is around 5000Ohm and does not change
with throttle movement.

4.4.4 Oil Temperature Sensor

Reserved for Future development.

4.6 Additional Wiring

4.6.1 Pin References for the TCU
The TCU has two connectors for all wiring combinations. A 12 way connector for power and
sensors, and a 10 way connector for all the outputs to the Transmission. Note that the TCU
connects to ground via the aluminum enclosure. It is not necessary that all the pins will be used.
There may be additional wires on the drawing that cannot be found on the pin descriptions. This is
due to other connections in the harness to ease with installation. The pin-outs are just for
Close
C
B
A
Open