PRO TUNE PR-8 User manual

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Disclaimer
Printed copies of this manual are not controlled.
This document is intellectual property of Pro Tune Electronic Systems. This manual cannot be reproduced,
distributed or transmitted by any means, electronic or printed, without the proper authorization of Pro Tune
Electronic Systems.
The company, its employees and resellers are not responsible for the incorrect use of the information,
inaccuracies or omissions in this document.
Pro Tune reserves the right to make changes to this document without prior notice.

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Congratulations!
You just bought a product from Pro Tune. We thank you for your trust in our products, which are produced
following stringent international standards together with highly rigorous quality control, so that you receive a
superior product in performance, finish and functionality.
Our products are 100% manufactured in Brazil, from the assembly of the electronic components, through
programming and finishing with the case machined in aluminum, which gives a durable and professional look to the
products.
We hope you have a great experience with Pro Tune products, and we are available to answer any questions
and supply any technical support you might have in installing or operating our products.

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Glossary of terms and abbreviations
CAN –Controller Area Network .
CKP –Crankshaft Position Sensor.
CMP –Camshaft Position Sensor.
DATALOG –Sample set of readings from a group of sensors, saved on a device with memory.
ECU –Engine Control Unit.
ET –Engine Temperature.
GPS –Global Position System.
IAT –Intake Air Temperature.
MAF –Mass Air Flow.
MAP –Manifold Absolute Pressure.
NTC –Negative Temperature Coefficient.
OBD II –On-Board Diagnostic II.
PEAK & HOLD –Activation strategy for low impedance fuel injectors.
PINOUT –Diagram, or pin configuration of a device.
TDC –Top Dead Center –Highest position of the piston inside the cylinder.
PP –Pedal Position Sensor.
PWM –Pulse Width Modulation.
RGB –Red Green Blue
SHIFT LIGHTS –Progressive lights with activation linked to engine speed.
TDL –Touch Dash Logger.
TP –Throttle Position.
TPS –Throttle Position Sensor.
USB - UNIVERSAL SERIAL BUS.

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Summary
1. Overview 6
Harness Reference Table 8
2. Read Before Installing 11
3. Installation Diagram 12
3.1 –Basic Wiring: 12
4.1 –Inputs 13
Crank and Camshaft Position Sensors 13
Manifold Absolute Pressure (MAP) 14
Throttle Position (TP) 14
Engine and Intake Air Temperatures Sensors 15
Thermocouple 15
Lambda Sensor NTK UEGO 17
Lambda Sensor NTK UEGO X2 17
Mass Air Flow–MAF 18
Pedal Position Sensor 18
Vehicle Speed Sensor 19
Generic Potentiometer (Gear Position, Steering Angle, etc) 19
Load on Shift Lever 20
Oil / Fuel Pressure 21
Injectors –Sequential 21
Injectors –16 Cylinders Semi-Sequential 22
Injectors –Secondary Injector Rail 22
Injectors –Secondary Injector Rail Semi-Sequential 23
Ignition Coils without Integrated Driver 23
Dual Ignition Coils without Integrated Driver Semi-Sequential 24
Triple Ignition Coils without Integrated Driver Semi-Sequential 24
Ignition Coils with Integrated Driver 25
Electric Fan 25
Electronic Throttle Contro Electronic Throttle Control X2 26
Switch 27
Solenoid Valve 28

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Tachometer Output 28
4. Sync 29
Trigger Wheel for Crank Position and Engine Speed: 29
Distributor for Rotation and Phase Reading: 31
Distributor only for phase reading: 31
Camshaft Position Sensor for Phase Reading: 31

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1.Overview
The PR-8 ECU features two waterproof connectors, one with 48 pins and the other with 23 pins. Their images
can be seen in the figure below.
The first connector uses a letter and number system to identify each pin, with the columns being identified
by letters A to M and lines identified by numbers 1 to 4, while the 23-pin connector uses a number system from 1
to23 to identify each pin. In addition to this alphanumeric label, all Pro Tunes pre-wired harness has cables with
identification printed on its cover.
The PR-8 ECU has an integrated USB port on the top where an A-B USB cable can be plugged into the ECU for
configuration, this USB port can also power the ECU for configuration. In addition, the ECU has CAN communication
used to communicate with various CAN devices.
Pro Tune ECU has several functions, for example, Dual Lambda Control, Dual Boost Control, and others.
Therefore, the factory-enabled functions on the ECU depends if the Full package is chosen at the purchase moment.
If there is an interest in using new functions, the user can contact Pro Tune to purchase only the activation code
needed, not requiring the exchange of the product or the installation of extra modules.
Before proceeding to the electrical installation, it is essential to choose the inputs to which the sensors will
be connected to the ECU. On the inputs equipped with pull-up resistors, it is possible to operate in Temperature
Mode to connect temperature sensors and buttons with ground-based operation.
The fast inputs are suitable for reading signals of sensors that have a high rate of variation, such as throttle
position, pedal position, intake pressure sensor and mass flow sensor. Inputs up to 15 V are suitable for sensors with
signal amplitude greater than 5V. These inputs can be used to, for example, read the trigger status of a 12V switch.
The digital inputs are those that support frequency signals. At these inputs, for example, wheel speed sensors can be
connected.

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Harness Reference Table
The Functions of each wire and its respective pin in the connector can be seen in the following table.
PR-8 - Power
Pin
Function
Lable
L2
Sensor Ground
No Lable
PIN_15
Sensor Ground
No Lable
K3
Sensor 5 V
SENSOR 5V
PIN_13
Sensor 5 V
SENSOR 5V
PIN_14
Sensor 8 V
SENSOR 8V
L3
Power Ground
No Lable
L4
Power Ground
No Lable
M4
12 V Power
+12V_SWITCH
PR-8 –Crank Position Sensor
Pin
Function
Label
F4
Positive Input - Crank Position Sensor (CKP+)
No Label
G4
Negative Input –Crank Position Sensor (CKP-)
No Label
*The cables described above are part of a triple shielded black cable with the label CKP.
PR-8 –Camshaft Position Sensor
Pin
Function
Label
H4
Positive Input –Camshaft Position Sensor (CMP+)
No Label
J4
Negative Input –Camshaft Position Sensor (CMP-)
No Label
* The cables described above are part of a triple shielded black cable with the label CMP.
PR-8 –Injectors
Pin
Function
Label
A1
Injector 1 Output
INJ_1
B1
Injector 2 Output
INJ_2
C1
Injector 3 Output
INJ_3
D1
Injector 4 Output
INJ_4
A4
Injector 5 Output
INJ_5
B4
Injector 6 Output
INJ_6
PIN_1
Injector 7 Output*
OUT_8
PIN_2
Injector 8 Output*
OUT_9
*Double function pins.

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PR-8 –Ignition
Pin
Function
Label
H1
Ignition 1 Output
IGN_1
J1
Ignition 2 Output
IGN_2
K1
Ignition 3 Output
IGN_3
H2
Ignition 4 Output
IGN_4
J2
Ignition 5 Output
IGN_5
K2
Ignition 6 Output
IGN_6
PR-8 –Auxiliaries Inputs
Pin
Function
Label
C2
Auxiliary Input 1
IN_1
D2
Auxiliary Input 2*
IN_2
E2
Auxiliary Input 3
IN_3
F2
Auxiliary Input 4
IN_4
G2
Auxiliary Input 5
IN_5
G3
Auxiliary Input 6
IN_6
F3
Auxiliary Input 7
IN_7
H3
Auxiliary Input 8
IN_8
J3
Auxiliary Input 9
IN_9
PIN_5
Auxiliary Input 10
IN_10
PIN_6
Auxiliary Input 11
IN_11
PIN_7
Auxiliary Input 12
IN_12
PIN_8
Auxiliary Input 13
IN_13
PIN_16
Auxiliary Input 14
IN_14
PIN_17
Auxiliary Input 15
IN_15
PIN_18
Auxiliary Input 16
IN_16
PIN_19
Auxiliary Input 17
IN_17
E4
Digital Input 2
DIG_IN2
PIN_9
Digital Input 5
DIG_IN5
PIN_10
Digital Input 6
DIG_IN6
PIN_11
Digital Input 7
DIG_IN7
PIN_12
Digital Input 8
DIG_IN8
PIN_20
Thermocouple Input 1+
TP1+
PIN_21
Thermocouple Input 1-
TP1-
PIN_22
Thermocouple Input 2+
TP2+
PIN_23
Thermocouple Input 2-
TP2-

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PR-8 - Auxiliaries Outputs
Pin
Function
Label
G1
Auxiliary Output 1
OUT_1
F1
Auxiliary Output 2
OUT_2
E1
Auxiliary Output 3
OUT_3
L1
Electronic Throttle Control Output (positive)
ETC+
M1
Electronic Throttle Control Output (negative)
ETC-
M3
Auxiliary Output 6
OUT_6
M2
Auxiliary Output 7*
OUT_7
PIN_1
Auxiliary Output 8*
OUT_8
PIN_2
Auxiliary Output 9*
OUT_9
PIN_3
Auxiliary Output 10
OUT_10
PIN_4
Auxiliary Output 11
OUT_11
K4
Main Relay Output
OUT_MAIN_RELAY
*Double function pins.
PR-8 –Lambda Sensor
Pin
Function
Label
A3
Lambda –Heater Ground
LAMBDA1_HT-
B3
Lambda –Reference (when using dual lambda control,
this pin serve as reference for both sensors)
LAMBDA1_SENSOR REF
C3
Lambda –Calibration
LAMBDA1_RCAL
D3
Lambda - Ipump
LAMBDA1_IP
E3
Lambda –Nernst Cell
No Label
C4
Lambda 2 –Calibration
LAMBDA2_RCAL
D4
Lambda2 - Ipump
LAMBDA2_IP
D2
Lambda –Nernst Cell * (Black wire from sensor)
IN_2
M2
Lambda 2 –Heater Ground
OUT_7
(white wire from sensor)
PR-8 –Communication
Pin
Function
Label
A2
Pro Tune CAN Low
CAN_LOW
B2
Pro Tune CAN High
CAN_HIGH

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2.Read Before Installing
Pro Tune products are developed with attention to robustness and reliability. However, some care is
required when installing the product
1 –Internal combustion engines are very sensible devices and in case of accidents present lethal risks. It is
very important that all care is taken, such as individual operator protection, fire prevention and fire fighting,
prior checking of fuels and lubricants, as well as the installation, maintenance and operation done only by
qualified people.
2 –Place the wiring harness as far as possible from the ignition circuit.
3 –Avoid installing the ECU in the engine compartment.
4 –Place the product in an accessible location for the USB cable, preferably with the main connector facing
down.
5 –When the wiring is done, keep unused (White) cables intact and connect them ti the negative battery
terminal.
6 –Make sure the intake pressure measurement hose attachment is securely fastened. Poorly fixed or
leaking hoses result in incorrect reading of intake pressure, which can cause serious engine damage.
7 –The intake hose must always be connected between the throttle body and the engine.
8 –If the triple cable named CMP is not used, do not cut it and isolate its wires individually.
9- Always check the wiring diagram of each sensor or actuator before finishing the harness and turning on
the ECU.
10- Pay attention to the safe grounding of the engine block and the vehicle chassis.
11-Pay attention to the sensors ground (Pin L2), with black cable, which should not be connected to the
battery or to the chassis of the vehicle. It is a ground wire for sensors, which must be used exclusively to
connect the negative terminal of the sensors.
12- Use suitable fuses in the power circuit.
13- Use suppressive spark plug cables and resistive type spark plugs.
14- Use shielded USB communication cables.

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3.Installation Diagram
3.1 –Basic Wiring:
Special Case:
When the user wishes that an auxiliary output to remain triggered after switching off the engine (electric
water pump, electric fan, etc), the ECU (pin 87 of the relay) and the main relay power must be apart from each other
in separated switches.

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4.1 –Inputs
Crank and Camshaft Position Sensors
1 –Inductive type:
*PS: The mesh must be grounded either on the Power GND pin of the ECU or through the sensor. If the mesh is
not grounded or grounded in the both sides, sync problems may occur.
2 –Hall effect type:

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Manifold Absolute Pressure (MAP)
Pro Tune ECUs have an internal MAP sensor, all you have to do is install a hose connecting the intake
manifold to the ECU. External MAP sensors can be used as well by following the diagram below.
Throttle Position (TP)

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Engine and Intake Air Temperatures Sensors
Thermocouple

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Lambda Sensor LSU 4.2 / 4.9
Lambda Sensor LSU 4.2 / 4.9 X2
CAUTION: LSU 4.2 and LSU 4.9 have different pinout. This scheme doesn’t illustrate sensor pinout.

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Lambda Sensor NTK UEGO
Lambda Sensor NTK UEGO X2

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Mass Air Flow–MAF
Pedal Position Sensor

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Vehicle Speed Sensor
Generic Potentiometer (Gear Position, Steering Angle, etc)