Haltech NEXUS R5 User manual

1
QUICK START GUIDE

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NEXUS R5 OVERVIEW
2
What is NEXUS R5?
• A new generation engine management system
• A power distribution module
• A data logger
• A dual channel universal wideband controller
• A high speed Wi-Fi communications module
• All natively interconnected with each other
• All programmable with one single
piece of software
The NEXUS R5 is Haltech’s new flagship
product. Boasting new, innovative yet
user-friendly technology, it sets a new market
standard for engine management and power
distribution systems.
An ECU, PDM, Wi-Fi module, wideband
controller and a data logger all in one.
NEXUS R5 OVERVIEW
NEX-US [noun]
– a connection or series of connections
linking two or more things.
– a connected group or series
– the central or most important point
or place
Optional accessories (sold separately)
• Plug and Pins Set. AMP 26 pin key 1 & 3
and 34 pin key 1 & 2, DTP-4. HT-030015
• Plug and Pins Set. Male DTP06-4S,
Black connector 25A (inc male plug, female
pins, wedgelock seal). HT-031201
• Plug Set. SurLok connectors red/black 200A.
HT-030030
• 1AWG Battery Cable red/black pair.
Pre terminated with SurLok connectors.
2m: HT-039212, 4m: HT-039214, 6m: HT-039216
• Glass mount Wi-Fi antenna with
1.5m terminated lead. HT-011401
• Wideband Flying Lead Adaptor Harness
400mm. HT-010723
• LSU4.9 Wideband Adaptor Harness
1200mm. HT-010726
• LSU4.9 Wideband Hardware Pack. Inc sensor,
adaptor harness and weld-in bung. HT-010746
• NTK Wideband Adaptor Harness
1200mm. HT-010727
• NTK Wideband Hardware Pack. Inc sensor,
adaptor harness and weld in bung. HT-010747
• NEXUS R5 VCU Tube Mount Kit
1.625” HT-039061. 1.25” HT-039060
• NEXUS Universal Wiring Harness
2.5m: HT-185200, 5m: HT-185201
• Manual cable lug crimping tool. HT-070305
• Hydraulic cable lug crimping tool. HT-070306
What’s in the box?
• NEXUS R5
• SurLok Connectors (Red & Black)
• Wi-Fi Antenna RP-SMA 108mm
• Mounting Bolts
• USB-C Cable
• USB-C Dust Cap
• Reverse mount VCU label
• USB drive with NSP Software
• Haltech Product Catalogue

45
1 Power LED
2 DTC LED
3 Wi-Fi LED
4 Datalog LED
5 8A HCO LEDs
6 25A HCO LEDs
7 Battery Negative Stud
8 Battery Positive Stud
9 Wi-Fi Antenna (RP-SMA)
10 USB-C Port (Comms)
11 Connector A (Superseal 34-pin Keyway 1)
12 Connector B(Superseal 26-pin Keyway 1)
13 Connector C (Superseal 34-pin Keyway 2)
14 Connector D(Superseal 26-pin Keyway 3)
15 Connector E (DTP-4)
16 Mounting Holes
10 11 12 13 14 15
123 45 6
78
9
16
16
NEXUS R5 OVERVIEW NEXUS R5 LED BEHAVIOUR
LED COLOUR CONDITION
Power Green Normal operation (on main power or low power mode)
Blue Connecttounitandinstallrmware
Red Hardware fault
DTC None DTCs not present
Yellow A DTC is present (of any kind, past/present/not severe/severe)
Blue PDMinbootmode-connecttounitandinstallrmware
WiFi None Wi-Fi is disabled
Green solid Wi-Fi is enabled
Green ashing Wi-Fi is enabled and connected to NSP
Datalog None Unit is not logging
Yellow ashing Unit is logging, unit is not looping or not full
Yellow Logging, unit is looping or full
HCO (all) None Channel is off
Green Channel is on - duty cycle is >0% and operating correctly
Red Channel is not allowed to be driven. Usually caused by (but not limited to)
an overcurrent this drive cycle

67
OUTPUTS
Ignition 12
Injector (peak and hold) 18
Digital Pulsed Outputs (DPO) 8
Power for Ignition Switch 1
Half Bridge Outputs (HBO) 4 (2 x H-Bridges/DBW throttles)
8A High Current Outputs (8A HCO) 12
25A High Current Outputs (25A HCO) 4
INPUTS
Analog Voltage Inputs (AVI) 23
Differential Engine Position Inputs 2 (Trigger and Home)
Synchronised Pulsed Inputs (SPI) 10
Knock Inputs 2
Universal Wideband Controllers (NTK/LSU 4.9) 2
Ignition Switch Input 1
OTHER
Inertial Measurement Sensor Onboard, 6 Axis
4 Channel Oscilloscope 50kSa/s per channel, 2ms/Div limit,
optional external trigger
5V Sensor Supply 2
8V Sensor Supply 1
Sensor Ground 2
Spare Ground pins for shields, sensors and low current CAN devices 2
COMMUNICATIONS
CAN Bus Networks 1000, 500 or 250 kbit/s 3
High Speed USB 2.0 (USB-C interface) 480 Mbit/s connection 1
PowerupoverUSB Datalogging,settingsandrmwareupgradeavailable
Wi-Fi 900 kB/s datalog extraction. Hardware lockout for security
DATA LOGGING
Location Onboard
Storage 512MB
Max sampling frequency 1kHz
Maximum channels per log 300
DIMENSIONS
Enclosure (Not including connector protrusion) 257 x 132 x 51 mm (10.1 x 5.2 x 2 in)
Overall (Including connector protrusion) 257 x 163 x 61 mm (10.1 x 6.4 x 2.4 in)
Weight 1.50 kg (3.307 lb)
Operating Temperature (external) -40 to 85°C (-40 to 185°F)
12 x Onboard Temperature Sensing Zones ECU: -40 to 125°C (-40 to 255°F)
PDM: -40 to 150°C (-40 to 300°F)
ELECTRICAL
Power Supply (across power terminals) 8 to 22V
Internal positive inline fuse (not user-serviceable) 32VDC 200A
No output static current draw <1A
Low Power Mode (USB) 4 to 5.5V
Static current draw from USB port 400mA
NEXUS R5 SPECIFICATIONS
FEATURES
Drive-By-Wire Throttle Support 2
Flex Fuel YES
Closed Loop O2 Control Dual Bank
Knock Control Dual
Variable Cam Control Up to 4
Long Term Learning Up to 4D
Data Logging Laptop + Onboard
Anti-Lag Rotational Idle YES
Launch Control YES
Traction Control YES
Tuning Table Resolution 32 x 32 x 8 4D
Engine Protection Multi Level
FEATURES continued
CAN Networks 3
Nitrous Control Stage 6
Boost Control 4D Closed Loop
CO2 Control YES
Intake Air Bleed Control YES
Flat Shift Control Advanced
Shock Travel & Ride Height YES
Trans Brake YES
Race Timer YES
Advanced Torque Management YES
On-board Wideband 2 Channel LSU 4.9 / NTK

89
NEXUS SOFTWARE - NSP NEXUS R5 CRIMPING
Installing the software
1. Insert the supplied USB Key into your PC. If
you have lost your USB key, you can download
the Haltech NSPsoftware from the DOWNLOADS
section of the Haltech website.
2. If the window does not open automatically, open
My Computer and find the USB drive. Double click
on the USB drive icon.
3. Double click on the installer icon located in the
root directory of the USB drive.
4. Once the Haltech NSP software is installed, run
the software.
Going Online with the ECU
1. Plug the supplied USB-C cable into the USB-C
Port on the front of the NEXUS R5.
2. The USB-C connection will power the ECU in a
low power mode.
This mode allows the user to connect to NSPfor
map configuration and data-log extractionwithout
powering the ECU completely. ECU inputs and
outputs are disabled in low power mode.
Setting up Wi-Fi communications
Wi-Fi communications can be enabled using NSP
in the Wi-Fi Module Settings.
When disabled, the module is held in an OFF state
and is completely inactive.
To set up your Wi-Fi connection follow these steps:
1. Open NSP and connect to your NEXUS R5 via
the supplied USB-C cable.
2. Click on Connections in the feature tree and
enable the Wi-Fi module setting.
3. Under Connections click on Wi-Fi to setup your
SSID and password. Your SSID must be at least 1
character and your password must be at least 8
characters.
3. NSPwill recognise the ECU automatically.
4. Click File/Open to choose your base map.
NOTE: The ECU must be powered on main power
for Wi-Fi communication. Up to two computers
may be connected to an ECU over Wi-Fi and one
over USB-C at any one time.
Separate the backshell and seal from the Surlok
connector body and slide them onto the cable to
be crimped. Strip 20mm (3/4”) of sheathing from
your 1AWG cable.
Insert your exposed cable into the Surlok
connector ferrule.
Crimp ferrule and cable together using the 50mm
die. Flip cable over to ensure ferrule is crimped
completely.
Pull the seal over the ferrule then pull the
backshell, tightening
it onto the Surlok
connector head.
4. Press Apply.
5. With the ECU powered up on main power go to
your computer’s Network settings and connect to
your NEXUS R5 by selecting your chosen SSID and
typing in your password.

10 11
SurLok terminals not installed
SurLok terminals installed
MOUNTING TEMPLATE
NEXUS R5 WIRING
Main Power
The NEXUS R5 must be connected to battery
positive and battery negative at all times for
correct operation.
• Connect the NEXUS R5 to the positive battery
terminalvia the supplied RED SurLok connector
using 1AWG cable and to the negative battery
terminal via the black SurLok connector using
1AWG cable.
There is aninternal 32VDC 200A Positive Inline
Fuse inside the ECU for overcurrent protection.
NOTE: the fuse is not auser-serviceable part.
An ignition switch input must bewired to the
NEXUS R5 to turn the unit on.
There are two ways to provide an ignition switch
signal:
• Method 1: Connect the power for ignition
switchon pin A26 to one side of the ignition switch,
and connect the ignition switch input on pin A13 to
the other side of the switch.
This way, when the ignition switch is closed, the
ECU will see a +12V signal on the ignition switch
input and power up the ECU.
• Method 2: instead of using thepower for ignition
switchpin, the hot side of the ignition switch can
simply be wired to any constant +12V source,
such that a +12V signal is detected on the ignition
switch input to power up the ECU.
Thispower for ignition switchprovides a very
low current constant +12V signal and must only
be used to provide a signal back into the ignition
switch input.
The battery ground pins on the NEXUS R5 are
NOT used to ground the ECU and should not be
connected to battery negativeor the chassis.
The battery ground pins are capable of3A current
per pin and are directly linked to the battery
negative stud internal to the NEXUS R5.
These pins are for shielding or to ground low
current CAN devices (e.g. keypads) and digital
sensors.
There are two sensor +5V pins (A and B) for
sensors, and two signal ground pins (A and B).
Each is capable of 200mA and can be used in any
order, e.g +5V supply (A) and signal ground (B) can
be wired to the same sensor.
+
-
IGNITION
SWITCH
A13 A26
+
-
IGNITION
SWITCH
A13
Method 1: Power Wiring using Pin A26 Method 2: Power Wiring using external
constant +12V source

MOUNTING TEMPLATE MOUNTING TEMPLATE

14 15
MOUNTING TEMPLATE
SurLok terminals not installed
SurLok terminals installed
Ignition Outputs
Ignition outputs must be connected directly to
an ignition module to control the ignition of the
vehicle.
Do not connect directly to a coil without an internal
or external ignition module as doing this will
damage the ECU.
The ECU ignition output produces a signal between
12V and ground to control the ignition module
allowing the charging and firing of the coil.
When not used for ignition, pins can be used as
generic Digital Pulsed Outputs (DPO) capable of
switching 3A to ground.
Specs:
• Software selectable global 12V or 5V
pull-up Voltage
• Individual software selectable 270R
pull-up Enable
• Flyback protected
• 3A sink current
• 10kHz switching speed
• Automatic overcurrent protection
• 0 to 27V voltage feedback
WARNING
Connecting the ECU to an ignition module before
setting the ignition firing edge correctly may
damage the module and coils, therefore it is
advised to disconnect the module or disable the
power to the ignition system until the unit has
been setup and configured.
IGN1
IGN4
IGN2
IGN3
IGN5
IGN8
IGN6
IGN7
HCO
WIRING SHOWN
DIRECT FIRE IGNITION
WARNING
THECOILS DEPICTEDINTHISDIAGRAM
(HT-020102) .HAVE INTERNALIGNITORS
DO NOTCONNECT IGNITION OUTPUTS
DIRECTLY TO COILS UNLESS THEY
HAVE INTERNAL IGNITORS
TECU.HISWILLDAMAGE THE
PLEASE USEANEXTERNALIGNITORFOR
.COILSWITHOUT INTERNAL IGNITORS
Example wiring connection
(Direct Fire Ignition wiring shown)
NOTE: The coils depicted in this diagram (HT-020102)
have internal ignitors. Do not connect ignition outputs
directly to coils unless they have internal ignitors.
This will damage the ECU. If your coils are without
internal ignitors you must use an external ignitor.
Ensure the High Current Output (8A or 25A) used to
power the ignition coils is capable of supplying the
required current.

17
Digital Pulsed Outputs (DPO)
Digital Pulsed Outputs are capable of producing
pulsed waveforms with varying duty and
frequency.
When a Digital Pulsed Output is activated by the
ECU the output will switch to ground.
The pull-up voltage specifies the waveforms
maximum voltage output eg 0 to 12V or 0 to 5V.
DPOs can be used to control various low-current
devices such as shift lights, bypass air control
valves, boost control solenoids, tachometers etc.
Specs:
• Individual software-selectable 12V or 5V
4k7 pull-up
• Flyback protected
• Capable of switching 3A to ground
• 10kHz switching speed
• Automatic overcurrent protection
• 0 to 27V voltage feedback
Half Bridge Outputs (HBO)
Half Bridge Outputs are push-pull pulse width
modulated (PWM) outputs. If not being used as
push-pull drivers, Half Bridge Outputs can be
used as generic high/low PWM outputs capable
ofsinking 8A to ground and driving 8A to 12V at
2.2kHz.
HBOs can be used to control any push-pull type
device such as DBW throttle motors (max of 2
wired separately) and stepper motors.
When used as generic high/low switched or
PWM outputs, Half Bridge Outputs can be used
as generic low-side DPOs or to control devices
such as high-side driven solenoids (e.g. VTEC
Solenoids), high side switched automatic
transmission solenoids etc.
Specs:
• Capable of sinking 8A to ground and
driving 8A to 12V
• Automatic Overcurrent and
Overtemperature Protection
• 0 to 27V voltage feedback
• High side current feedback
• 18kHz switching speed in DBW mode
• Capable of 0-100% duty cycle
NEXUS R5 WIRING
DPO
HCO
BOOST
CONTROL
SOLENOID
TO OTHER
DEVICES
HBO1
HBO4
HBO2
HBO3
DBW THROTTLE 2
DBWTHROTTLE1
Example wiring connection
Example wiring connection
Ensure the High Current Output (8A or 25A)
used to power solenoids and other devices is
capable of supplying the required current.
Injection Outputs
All Injectors are to be wired directly to the ECU’s
corresponding cylinder output pins.
When an injection event occurs the ECU will
ground the output pin, opening the injector.
All injectors must be wired to a common +12V
supply from one of the High Current Outputs on
the NEXUS R5.
When not used for injection, pins can be used as
genericDigital Pulsed Outputs (DPO) capable of
switching 2A to ground.
Specs:
• Current controlled output
• 8A Peak, 2A Hold
• 0 to 55V voltage feedback
INJ#1
INJ#4
INJ#2
INJ#3
INJ#5
INJ#8
INJ#6
INJ#7
HCO
WIRING SHOWN
SEQUENTIAL INJECTION
Example wiring connection
(Sequential Injection wiring shown)
Ensure the High Current Output (8A or 25A) used to
power the injectors is capable of supplying the required
current.
16

18 19
8A High Current Outputs (8A HCO)
The NEXUS R5 features 12 high side outputs which
are capable of driving 8A to 12V.
Each output has a software programmable fuse
current.
Once the electronic fuse blows the output turns
off for a software programmable delay duration,
before reactivating the output.
Use the software to define the maximum number
of retries before the output is deactivated untilthe
next ECU reboot. The ECU LEDs display the output
state.
8A HCOs are PWM capable and can be used to
power CAN devices or solenoids.
They can also control automatic transmission
shift solenoids, water pumps, some nitrous and
transbrake solenoids etc.
Specs:
• Automatic overcurrent protection
• Flyback protected
• 0 to 30V voltage feedback
• High side current feedback
• 100Hz max switching speed
• Capable of 0-100% duty cycle
25A High Current Outputs
The NEXUS R5 features four high/low outputs
capable of sinking 25A to ground and driving
25A to 12V. Each output has a programmable
fuse current, slow-start current and duration.
Once the electronic fuse blows the output turns
off for a pre-programmed delay duration before
reactivating the output. Use the NSP software to
define the maximum number of retries before the
output is deactivated until the next ECU reboot.
The ECU LEDs display the output state.
25A HCOs are PWM capable and can be used
for ignition power and injector power as well
as to PWM thermofans and fuel pumps, control
transbrake solenoids, nitrous solenoids etc.
Specs:
• Automatic overcurrent protection
• Flyback protected
• -30 to 30V voltage feedback
• High side current feedback
• 1kHz max switching speed
• Capable of 0-100% duty cycle
NEXUS R5 WIRING
8A HCO
TO GROUND
25A HCO
TO GROUND
THERMOFA N
Example Wiring Connections
Example Wiring Connections
Crank (Trigger) and Cam (Home) Inputs
The crank and cam position sensors are required
so that the ECU has the necessary information
available to determine engine speed and position
at any point in time.
Generally two sensors are required - a cam
position and crank position, however many
engines will have just a cam position sensor that
is capable of giving the ECU enough information to
run the engine correctly.
Vehicles that have a crank position sensor only
are not capable of determining the difference
between compression stroke and exhaust stroke
and therefore are not suitable for sequential fire
applications.
In this case a cam position sensor may need to be
added.
It is recommended that four-core or twin-core
shielded cable is used for crank and cam position
sensors. Shields must be terminated to battery
ground at one end only.
Specs:
• -5V to 5V input
• 1 million samples per second
• Selectable 1k2 or 440R pull-up to 5V
• Selectable ground reference (full differential
standard mode)
• -75 to 75V indefinite withstand
• 48kHz max signal frequency
There are two common types of crank/cam sensor
signals:
• Hall effect/optical signal
(0-5V digital square wave signal)
Hall effect sensors usually have 3 wires; a power
supply (5V, 8V or 12V), a ground and a signal
out wire. The power supply can be taken from
the Sensor +5V pin, sensor +8V pin or a HCO as
required.
• Reluctor signal (analog style signal)
This type of sensor will generally only have two
wires, signal positive (+) and signal negative ( - )
Sensors with a +5V supply do not require the pull-
up resistor be enabled, for example, rotary trim
modules.
Any sensor +5V pin can be used with any signal
ground pin for sensors.
Xindicates not connected
Please isolate and insulate
to avoid damage to ECU
Xindicates not connected
Please isolate and insulate
to avoid damage to ECU
Hall Eect Sensor
X
o
-
+
+12V
Signal Ground
Crank (Trigger) (+)
Crank (Trigger) (-)
Reluctor Sensor
X
-
+
X
+12V
Signal Ground
Crank (Trigger) (+)
Crank (Trigger) (-)
Example Wiring Connections

20 21
NEXUS R5 WIRING Synchronised Pulsed Inputs (SPI)
Synchronised Pulsed Inputs are capable of
measuring the position, duty cycle, frequency or
state of a signal, as well as analog voltage inputs.
These inputs are suitable for sensors such as cam
position sensors, fuel composition sensors, road
speed sensors and flat shift switch.
Synchronised Pulsed Inputs are compatible with
digital (hall effect or optical) and reluctor (analog)
based sensors, have a maximum input voltage
rating of 25V and can measure up to 50KHz
Maximum frequency.
Specs:
• -10 to 10V digital input
• 0 to 5V analog input
• 1 million samples per second
• Selectable 1k pull-up to 5V
• -15 to 30V indefinite withstand
• 22.5kHz signal frequency max
SPI
SIGNALGROUND
HCO
FREQUENCY BASED FLEX FUEL SENSOR
FLEX
FUEL SENSOR
FUEL SENSOR
TO OTHER
DEVICES
KNOCK
SIGNALGROUND
KNOCK SENSOR
Knock Inputs
A knock sensor detects engine knock and sends a
voltage signal to the ECU.
The NEXUS R5 ECU uses the knock sensor signal
to modify ignition timing if knocking occurs.
Knock detection can be performed by the ECU by
installing a compatible piezoelectric knock sensor
mounted to the engine block.
It is recommended that twin-core shielded cable
is used for knock sensors. Shields must be
terminated to battery ground at one end only.
Specs:
• -2.5 to 2.5V AC input only
• 160Hz to 48kHz signal frequency band
• +-3V indefinite AC voltage withstand
• 50V indefinite DC withstand
Example Wiring Connections
Example Wiring Connections
Analogue Voltage Inputs (AVI)
Analogue Voltage Inputs are inputs to the ECU that
accept variable voltage signals from 0V to +5V
such as signals from pressure, temperature and
fuel level sensors.
AVI inputs can tolerate a maximum input voltage
of 30V.
These inputs can also accept switched inputs that
change between two different voltage levels.
The On Voltage and Off Voltage define what the
thresholds are between the on and off states.
The voltage can be viewed as a channel in NSP to
determine the thresholds for a switched input.
Common examples of switched inputs include A/C
Request switch and intercooler spray switch.
AVIs have a software selectable 1K pull-up
resistor to 5V, which can be enabled or disabled
within the setup page.
Pull-up resistors are generally enabled for
temperature related sensors and switched to
ground inputs.
Specs:
• 0 to 5V
• 1000 samples per second
• Selectable 1k pull-up to 5V
• -10 to 30V indefinite withstand
• 1.5kHz signal frequency max
• All capable of DBW/narrowband use
TEMPERATURE
AVI
SIGNALGROUND
SENSOR
AVI
SIGNALGROUND
SENSOR +5V
ROTARY TRIM MODULE
HT-010504
TEMPERATURE
AVI
SIGNALGROUND
SENSOR
AVI
SIGNALGROUND
SENSOR +5V
ROTARY TRIM MODULE
HT-010504
Pull-up resistors are generally enabled for
temperature related sensors and switched
to ground inputs. The following configuration
requires the pull-up resistor be enabled.
Sensors with a +5V supply do not require the pull-up resistor
be enabled, for example, rotary trim modules.
Any Sensor +5V pin can be used with any Signal Ground pin
for sensors. HT-011000

22 23
NEXUS R5 WIRING
At Haltech we make every effort to design and manufacture fault-free products
that perform up to or above the market expectations. All our products are covered
by a Limited 12 Month Warranty.
Haltech Limited Warranty
Unless specied otherwise, Haltech warrants its products to be free from defects in material or
workmanship for a period of 12 months from the date of purchase.
If the Haltech product is found to be defective as mentioned above, it will be replaced or repaired
if returned prepaid along with proof of purchase. Proof of purchase in the form of a copy of the
original purchase invoice, receipt or bill of sale which indicates that the product is within the
warranty period, must be presented to obtain warranty service.
Replacement or repair of a defective product shall constitute the sole liability of Haltech. To
the extent permitted by law, the foregoing is exclusive and in lieu of all other warranties or
representations, either expressed or implied, including any implied warranty of merchantability or
tness. In no event shall Haltech, be liable for special or consequential damages.
Product Returns
Please include a copy of the original purchase invoice, receipt or bill of sale along with the
unused, undamaged product and its original packaging. Any product returned with missing ac-
cessory items or packaging will incur extra charges to return the item to a re-saleable condition.
All product returns must be sent via a freight method with adequate tracking, insurance and proof
of delivery services. Haltech will not be held responsible for product returns lost during transit.
Returns of Products Supplied in Sealed Packaging
The sale of any sensor or accessory supplied in sealed packaging is strictly non-refundable
if the sealed packaging has been opened or tampered with. This will be clearly noted on the
product packaging. If you do not accept these terms please return the sensor in its original un-
opened packaging within 30 days for a full refund.
A sensor or accessory product may be returned after 30 days of purchase (with its sealed pack-
aging in tact) for credit only (no refunds given) and will be subject to a 10% restocking fee.
Installation of Haltech Products
No responsibility whatsoever is accepted by Haltech for the tment of Haltech Products. The
onus is clearly on the installer to ensure that both their knowledge and the parts selected are cor-
rect for that particular application. Any damage to parts or consequential damage or costs result-
ing from the incorrect installation of Haltech products are totally the responsibility of the installer.
Always disconnect the battery when doing electrical work on your vehicle. Avoid sparks, open
ames or use of electrical devices near ammable substances. Do not run the engine with a
battery charger connected as this could damage the ECU and other electrical equipment.
Do not overcharge the battery or reverse the polarity of the battery or any charging unit. Discon-
nect the Haltech ECU from the electrical system whenever doing any welding on the vehicle by
unplugging the wiring harness connector from the ECU.
After completing the ECU installation, make sure there is no wiring left un-insulated. Uninsulated
wiring can cause sparks, short circuits and in some cases re. Before attempting to run the en-
gine ensure there are no leaks in the fuel system.
All fuel system components and wiring should be mounted away from heat sources, shielded
if necessary and well ventilated. Always ensure that you follow workshop safety procedures. If
you’re working underneath a jacked-up car, always use safety stands!
____________________________________________________________________________
Haltech Off-Road Usage Policy
In many states it is unlawful to tamper with your vehicle’s emissions equipment. Haltech products
are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles
only and may never be used on a public road or highway.
Using Haltech products for street/road use on public roads or highways is prohibited by law un-
less a specic regulatory exemption exists (more information can be found on the SEMA Action
Network website www.semasan.com/emissions for state by state details in the USA).
It is the responsibility of the installer and/or user of this product to ensure compliance with all
applicable local and federal laws and regulations. Please check with your local vehicle authority
before purchasing, using or installing any Haltech product.
WARRANTY CERTIFICATE
Wideband Sensor Inputs
Up to Two Wideband O2 sensors can be connected
directly to the NEXUS R5 for monitoring purposes,
or for closed loop O2 control.
A wideband sensor, by definition, measures a
broad section of the Air Fuel Ratio (AFR) scale.
The NEXUS R5 provides on-board individually
selectable support for Bosch LSU 4.9 or NTK
wideband sensors, using the sensors’ calibration
resistor.
The chosen wideband sensor can be selected in
the wideband O2 sensor settings in NSP.
Wideband harnesses, sensors and hardware packs
(includingthe desired sensor, wiring harness and
bung) can be purchased separately.
CAN Bus
The NEXUS R5 includes three separate CAN buses.
If using the Haltech CAN bus, see the wiring
information on your selected CAN device to ensure
the CAN bus is correctly configured.
Specs
• 1000, 500 or 250 kbit/s
• Per channel selectable 120R termination
• -40 to 40V short protection
• Supports all Haltech expansion products
• Selectable preconfigured vehicle CAN interface
• OBD-II compliant
LSU4.9OR
NTK
HT-010723
HT-010726 LSU 4.9
HT-010727 NTK

Haltech Australia
17 Durian Place, Wetherill Park
NSW 2164 Australia
Phone: [phone]
Email: [e-mail]
Haltech New Zealand
9B Weza Lane, Kumeu 0810 NZ
Phone: [phone]
Email: [e-mail]
Haltech USA East
750 Miles Point Way,
Lexington, KY 40510 USA
Phone: [phone]
Email: [e-mail]
Haltech USA West
Race Winning Brands,
10800 Valley View Street,
Cypress, CA 90630 USA
Phone: [phone]
Email: [e-mail]
Haltech Europe
Ottogasse 2A,
2333 Leopoldsdorf, Austria
Phone: [phone]
Email: [e-mail]
Haltech UK
Unit 1, Miras Business Estate, Lower Keys
Business Park,
Keys Park Road, Hednesford, WS12 2FS
Phone: [phone]
Email: [e-mail] facebook.com/HaltechEngineManagement youtube.com/haltechecu instagram.com/haltechecu
03/2023