Haltech NEXUS R3 User manual

1
QUICK START GUIDE

3
NEXUS R3 OVERVIEW
2
What is a NEXUS R3 Vehicle Control Unit?
• A new generation engine management system
• A power distribution module
• A data logger
• A 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 R3 is one of Haltech’s Vehicle
Control Units (VCU) which features additional
functionality that extends beyond just engine
control. Boasting 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 R3 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 34 pin key 1, AMP 34 pin
key 2, DTP 4 pin: HT-030013
• NEXUS R3 Universal Wiring Harness 2.5m:
HT-183200
• Glass mount Wi-Fi antenna with
1.5m terminated lead. HT-011401
• Wideband Flying Lead Adaptor Harness
400mm. HT-010723
• LSU4.9 Wideband Hardware Pack. Inc sensor,
adaptor harness and weld-in bung. HT-010746
• NTK Wideband Hardware Pack. Inc sensor,
adaptor harness and weld in bung. HT-010747
• NEXUS R3 Tube Mount Kit
1.625” HT-039067. 1.25” HT-039065
• Hydraulic cable lug crimping tool. HT-070306
What’s in the box?
• NEXUS R3
• SurLok Connectors (Red & Black)
• Wi-Fi Antenna RP-SMA 108mm
• Mounting Bolts
• USB-C Cable
• USB-C Dust Cap
• Reverse mount VCU label
• USB Key with NSP Software
• Haltech Product Catalogue
HT-030013
HT-183200
HT-011401
HT-010723
HT-010746
HT-010747
HT-039065
HT-070306

45
1 Power LED
2 DTC LED
3 Wi-Fi LED
4 Datalog LED
5 25A HCO LEDs
6 Battery Negative Stud
7 Battery Positive Stud
8 Wi-Fi Antenna (RP-SMA)
9 Onboard MAP sensor (4 BAR)
10 USB-C Port (Comms)
11 Connector A (AMP 34 pin Keyway 1)
12 Connector C (AMP 34 pin Keyway 2)
13 Connector E (DTP 4 pin)
14 Mounting Holes
8
12345
67
14 14
10
9
11 12 13
NEXUS R3 OVERVIEW NEXUS R3 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)
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 Unit is logging, unit is looping or full
HCO (25A) 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 8
Injector (peak and hold) 8
Digital Pulsed Outputs (DPO) 6
Power for Ignition Switch 1
Half Bridge Outputs (HBO) 6
25A High Current Outputs (25A HCO) 4
INPUTS
Analog Voltage Inputs (AVI) 11
Differential Engine Position Inputs 2 (Trigger and Home)
Synchronised Pulsed Inputs (SPI) 6
Knock Inputs 2
Universal Wideband Controllers (NTK/LSU 4.9) 1
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 1
8V Sensor Supply 1
Sensor Ground 1
Spare Ground pins for shields, sensors and low current CAN devices 2
COMMUNICATIONS
CAN Bus Networks 1000, 500 or 250 kbit/s 2
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 128MB
Max sampling frequency 1kHz
Maximum channels per log 300
DIMENSIONS
Enclosure (Not including connector protrusion) 196 x 130 x 44.5 mm (7.7 x 5.2 x 1.8 in)
Overall (Including connector protrusion) 196 x 149 x 44.5 mm (7.7 x 5.9 x 1.8 in)
Weight 1.15 kg (2.53 lbs)
Operating Temperature (ambient) -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 302°F)
ELECTRICAL
Power Supply (across power terminals) 8 to 22V
No output static current draw < 1A
Low Power Mode (USB) 4 to 5.5V
Static current draw from USB port < 500mA
NEXUS R3 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 2
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 Single Channel LSU 4.9 / NTK

89
NEXUS SOFTWARE - NSP
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 VCU
1. Plug the supplied USB-C cable into the USB-C
Port on the front of the NEXUS R3.
2. The USB-C connection will power the VCU in a
low power mode.
This mode allows the user to connect to NSPfor
map configuration and data-log extractionwithout
powering the VCU completely. VCU 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 R3 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.
4. Press Apply.
5. With the VCU powered up on main power go to
your computer’s Network settings and connect to
your NEXUS R3 by selecting your chosen SSID and
typing in your password.
3. NSPwill recognise the VCU automatically.
4. Click File/Open to choose your base map.
NOTE: The VCU must be powered on main
power for Wi-Fi communication. Up to two
computers may be connected to the VCU over
Wi-Fi and one over USB-C at any one time.

10 11
NEXUS R3 CONNECTIONS
Main Power and Ground
The NEXUS R3 must be connected to battery
positive and battery negative at all times for
correct operation.
Connect the NEXUS R3 to the positive battery
terminalvia the supplied RED SurLok connector
using a 4AWG cable and to the negative battery
terminal via the black SurLok connector using a
4AWG cable.
+
-
Battery Ground Output
The battery ground output pins (A10, A11) are
capable of3A per pin and are directly linked to the
battery negative stud internal to the NEXUS R3.
These pins can be used for cable shielding
connections or to ground low current CAN devices,
digital sensors, or switch grounds.
These battery ground output pins are NOT meant
to ground the VCU and should not be connected to
battery negativeor the chassis. 
CHASSIS /
ENGINE /
BATTERY
GROUND
PIN A10 /A11
Ignition Switch
The ignition switch input pin (A13) must be
connected to a switched +12V source to turn the
NEXUS R3 on.
Method 1: If wiring to an existing ignition key
switch in the vehicle, it is important to make
sure to wire A13 to the main ignition wire (i.e.
not accessory) so it doesn’t loose power while
the engine is cranking causing the VCU to
momentarily turn off.
Method 2: Alternatively, the ignition switch input
(A13) and the low current +12V power source
(A26) can be switched together to turn the VCU
On or Off.
NOTE: Pin A26 is a low current +12V source and
must not be used to power any other device in the
vehicle. Insulate and isolate if not used.
BATTERY
ACCESSORY
IGNITION
START
IGN SW INPUT
IGN SW INPUT
(LOW CURRENT)
SWITCHING THE VCU ON (METHOD 1)
SWITCHING THE VCU ON (METHOD 2)
+12V
MOUNTING TEMPLATE
50mm
21mm
(Subject to tolerances)
SurLok terminals installed

12 13
196mm
130mm
6.50mm
61.9mm
174.2mm
MOUNTING TEMPLATE MOUNTING TEMPLATE

14 15
NEXUS R3 WIRING
indicates not connected. Please insulate and isolate to avoid damage to the ECU.
+12V (HBO5)
SIGNAL GROUND
CRANK (TRIGGER +)
CRANK (TRIGGER -)
HALL SENSOREFFECT
RELUCTOR SENSOR
+12V (HBO5)
SIGNAL GROUND
CRANK (TRIGGER +)
CRANK (TRIGGER -)
Example Wiring Connections
Crank (Trigger) and Cam (Home) Inputs
The crank and cam position sensors are required
so that the VCU 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 VCU 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:
• -10V to +10V input
• 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)
This type of sensor sends out a 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
HBO as required. The internal pullup will typically
need to be enabled in the settings for Hall effect /
optical sensors.
• Reluctor signal (analog style signal)
This type of sensor sends out a sine wave type
of signal and will generally use two wires, signal
positive (+) and signal negative ( - )
Reluctor sensors do not require external power
as these sensors can generate their own voltage
signal as the sensor reads a moving tooth or
trigger. The internal pullup will need to be
disabled in the settings in NSP for reluctor
sensors.
MOUNTING TEMPLATE
44.50mm
29mm
42mm

17
NEXUS R3 WIRING
Injector Outputs
All injectors are to be wired directly to the VCU’s
corresponding cylinder output pins.
When an injection event occurs the VCU 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 R3.
When not used for injection, pins can be used as
genericDigital Pulsed Outputs (DPO) capable of
switching 2A to ground.
Specs:
• Number of channels: 8
• Current controlled output
• 8A Peak, 2A Hold
• 0 to 55V voltage feedback
Unused injector outputs can also be used as:
• Generic switched or PWM outputs (2A)
• Low speed digital switch inputs (0-12V)
INJ1
INJ4
INJ2
INJ3
INJ5
INJ8
INJ6
INJ7
25A-
HCO1
8-CYL INJECTIONSEQUENTIAL
1
3
5
7
2
4
6
8
(WIRE AS PER CYLINDER ORDER)
16
Example wiring connection shown: Sequential injection wiring with 25A-HCO1 used as injector 12V.
Ensure the high current output used to power the injectors is capable of supplying the required
current.
Ignition Outputs
The ignition outputs produce a signal between
12V and ground to control the charging and firing
of an ignition coil. Ignition outputs can only be
connected directly to ignition coils if the coils are
equipped with internal ignitors.
Ignition coils without internal ignitors draw large
amounts of current and thus must use an external
ignitor module to be safely triggered by the
VCU. Connecting directly to ignition coils without
internal ignitors will damage the VCU.
Specs:
• Number of channels: 8
• Software selectable global 12V or 5V pull-up
• Software selectable individual 270R pull-up
• 10kHz switching speed
• Automatic overtemp, overcurrent, flyback
protection
• 0 to 27V voltage feedback
Unused ignition outputs can also be used as:
• Generic DPO (3A sink) or PWM outputs
• Low speed digital switch inputs (0-12V)
WARNING
Connecting the VCU 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
25A-
HCO2
8-CYL DIRECT FIRE IGNITION
1
3
5
7
2
4
6
8
(WIRE AS PER CYLINDER ORDER)
Example wiring connection shown: Direct fire ignition wiring with 25A-HCO2 used as ignition coil 12V.
Ensure the high current output used to power the ignition coils is capable of supplying the required
current.
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 as this will damage the VCU. If your coils
are without internal ignitors an external ignitor must be used.

18 19
NEXUS R3 WIRING
25A-HCO3
25A-HCO4
THERMOFAN
FUEL PUMP
BATTERY
GROUND
BATTERY
GROUND
Example Wiring Connections
Half Bridge Outputs (HBO)
Half Bridge Outputs are push-pull Pulse Width
Modulated (PWM) outputs that can be used to
control DBW throttle motors, idle air stepper
motors or electronic wastegates.
If not being used as push-pull drivers, Half Bridge
Outputs on the NEXUS R3 can also be used as
generic high side or low side outputs capable of
driving 8A to 12V, or sinking 8A to ground.
When used for DBW throttle motors, any HBO pair
can be arbitrarily used and assigned (e.g. HBO 1
and HBO 4) in the DBW wiring settings in the NSP
software.
Specs:
• Number of channels: 6
• 8A to 12V (high), or 8A to ground (low) output
• 5A max when used as push-pull PWM (eg DBW)
• Automatic overcurrent and overtemperature
protection
• 0 to 27V feedback
• High side current feedback
• 18kHz switching speed in DBW mode
Unused HBOs can be used as:
• Generic push/pull 2.2kHz PWM output
DPO
BOOST
CONTROL
SOLENOID
BOOST
CONTROL
SOLENOID
+12V (HBO6)
BOOST SOLENOID
Example Wiring Connection
25A High Current Outputs
The NEXUS R3 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. You can use the NSP software to define
the maximum number of retries before the output
is deactivated until the next VCU reboot. The VCU
LEDs conveniently 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
HBO1
HBO4
HBO2
HBO3
DBWTHROTTLE2
DBWTHROTTLE1
The NEXUS R3 supports up to two DBW
throttles, independently controlled in
closed loop. Any pair of HBOs can be
assigned in NSP to control each throttle
motor.
Example Wiring Connections Digital Pulsed Outputs (DPO)
Digital Pulsed Outputs are capable of producing
pulsed waveforms with varying duty, varying
frequency, or switched states. When a DPO is
activated by the VCU the output will switch to
ground.
DPOs can be used to control various low-current
devices such as shift lights, bypass air control
valves, boost control solenoids, tachometers etc.
Specs:
• Number of channels: 6
• Selectable 4k7 pullup to 12V, to 5V, or disable.
• Overcurrent, overheat, and flyback protection
• Low side drive (3A max current)
• 10kHz switching speed
• 0 to 27V feedback
Unused DPOs can be also be used as:
• Generic PWM outputs
• Low speed digital switch inputs (0-12V) with
pullup enable
BATTERY
GROUND
HBO
ELECTRIC WATER PUMP
transbrake solenoids, nitrous solenoids etc.
Specs:
• Number of channels: 4
• 25A source or sink current output
• Automatic high and low side overcurrent
and undervoltage lockout protection
• 0 to 30V feedback
• High and low side current feedback
• 1kHz switching speed
• Capable of 0-100% duty cycle
Example Wiring Connections

20 21
NEXUS R3 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 analog (reluctor)
based sensors, have a maximum input voltage
rating of 25V and can measure up to 22.5kHz
Maximum frequency.
Specs:
• Number of channels: 6
• -10 to +10V digital input
• 0 to 5V analog input
• Selectable 1k pull-up to 5V
• -15 to +30V indefinite withstand
• 22.5kHz signal frequency max
HT-011000 - HALTECH FLEX FUEL SENSOR
+12V (HBO6)
SIGNAL GROUND
SPI
SENSOR
KNOCK INPUT
GROUND
KNOCK SENSOR
Knock Inputs
A knock sensor detects engine knock and sends a
voltage signal to the VCU.
The NEXUS R3 VCU uses the knock sensor signal
to modify ignition timing if knocking occurs.
Knock detection can be performed by the VCU 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:
• Number of channels: 2
• -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
Analog Voltage Inputs (AVI)
Analog Voltage Inputs are inputs to the VCU that
accept variable voltage signals from 0V to 5V
such as signals from pressure, temperature and
position sensors.
These inputs can also accept switched inputs that
change between two different voltage levels. The
On Voltage and Off Voltage set in NSP defines what
the thresholds are between the On and Off states.
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 and disabled with external +5V
supply like a MAP sensor or throttle position
sensor .
Specs:
• Number of channels: 11
• 0 to 5V analog inputs
• 1000 samples per second
• Selectable 1k pull-up to 5V
• -10 to +30V indefinite withstand
• 1.5kHz signal frequency max
AVI
SIGNAL
GROUND
TEMPERATURE SENSOR
AVI
SIGNAL GROUND
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.

22 23
NEXUS R3 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 represen-
tations, 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 unopened
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 intact) 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 Input
A wideband O2 sensor can be connected directly to
the NEXUS R3’s onboard wideband controller.
A wideband O2 sensor, by definition, measures
a broad section of the Air Fuel Ratio (AFR) scale
which is a useful tool for fuel tuning, closed loop
O2 control, or for engine protection.
The NEXUS R3 supports onboard wideband control
for Bosch LSU 4.9 or NTK wideband sensors,
which can be selected in the wideband O2 sensor
settings in NSP.
If more than one wideband O2 sensor is required,
the NEXUS R3 can be further expanded to use
multiple wideband O2 sensors by using external
Haltech CAN wideband controller kits such as the
Haltech WB1 or Haltech WB2. The diagram below
shows an example of a dual wideband sensor
connection with one sensor connected directly to
the NEXUS R3 and the other through an external
CAN WB controller.
Haltech CAN System
The NEXUS R3 includes two channels of CAN:
CAN 1 and CAN 2 - which may be used with a
range of Haltech CAN expansion products, or to
work with a supported vehicle CAN device (eg
factory cluster).
The diagram below shows an example connection
to multiple Haltech CAN devices (sold separately).
Specs
• Supports CAN speeds up to 1 Mbit/s
• Selectable 120ohm termination resistor
per CAN channel
• Supports all Haltech CAN expansion products
• Selectable preconfigured vehicle CAN interface
(OBDII compliant)
TCA8
WB1
CAN
HUB
CAN 1
CAN 2
KEYPAD
R3 ONBOARD
WB CONNECTION
NEXUS R3 iC-7 DASH
NEXUS R3 UNIVERSAL WIRE-IN HARNESS
HALTECH WB SENSOR KIT

facebook.com/HaltechEngineManagement youtube.com/haltechecu instagram.com/haltechecu
03/2023
Haltech Australia
17 Durian Place,
Wetherill Park NSW 2164
Australia
Phone: [phone]
Email: [e-mail]
Haltech New Zealand
Grey Lynn Auckland, NZ 1021
Phone: [phone]
Email: [e-mail]
Haltech USA East
750 Miles Point Way,
Lexington, KY USA 40510
Phone: [phone]
Email: [e-mail]
Haltech USA West
Race Winning Brands,
10800 Valley View Street,
Cypress, CA 90630
Phone: [phone]
Email: [e-mail]
Haltech UK
Unit 1, Miras Business Estate,
Keys Park Road, Hednesford,
WS12 2FS
Phone: [phone]
Email: [e-mail]
Haltech Europe
Ottogasse 2A,
2333 Leopoldsdorf, Austria
Phone: [phone]
Email: [e-mail]