ECU plus PDM
Sold separately
Sold separately
Haltech Nexus R3 VCU (HT-193000)
Black Friday Sale
Priced for Black Friday
Ends in
SKU: HT-193000
Finish Your Nexus R3 Install
ECU plus PDM
Sold separately
Sold separately
ECUs always ship FREE with Tuned By Shawn!
Manufacturer Limited Warranty
Haltech Nexus R3 VCU (HT-193000)
Product details
Description
The Haltech Nexus R3 VCU is the core of a serious engine management installation, with the processing power, I/O, and software support to control the engine properly and prove it in data. Engines with up to 8 cylinders or up to 4 rotors. Racing applications where advanced race features, data logging and power management control is required.
What You'll Feel
From the driver's seat: an engine that starts, idles, and drives like a factory car while the VCU handles engine management, power distribution, and wideband control natively. Fuel pump and thermofan control are direct, solid state, and logged.
Features
- Engine management, PDM, data logger, and wideband controller in one device
- 4 x 25A continuous push-pull outputs, PWM capable (fuel pump, thermofan, coils, transbrake)
- Peak and hold injector drivers and DBW support
- Onboard wideband controller (NTK and LSU 4.9)
- Multiple CAN ports for dashes and expansion
The Details
- SKU: HT-193000
Nexus R3 VCU Pinout
Complete pin-by-pin map of all three Nexus R3 VCU connectors. Wire colors are those of the Nexus R3 universal wire-in harness. Main battery power connects via the SurLok terminals, not these connectors.
Connector A
34-pin AMP, Keyway 1 - injectors, ignition, DPO, HBO, battery ground out and CAN 1.
Looking into the connector on the VCU
| Pin | Function | Harness Wire Color |
|---|---|---|
| A1 | Injector 1 | Blue |
| A2 | Injector 2 | Blue/Black |
| A3 | Injector 3 | Blue/Brown |
| A4 | Injector 4 | Blue/Red |
| A5 | Injector 5 | Blue/Orange |
| A6 | Injector 6 | Blue/Yellow |
| A7 | Injector 7 | Blue/Green |
| A8 | Injector 8 | Blue/Violet |
| A9 | DPO 1 | Violet/Black |
| A10 | Battery Ground Out | Black |
| A11 | Battery Ground Out | Black |
| A12 | DPO 2 | Violet/Brown |
| A13 | Ignition Switch Input | Pink |
| A14 | DPO 3 | Violet/Red |
| A15 | DPO 4 | Violet/Orange |
| A16 | DPO 5 | Violet/Yellow |
| A17 | DPO 6 | Violet/Green |
| A18 | HBO 5 | Pink/Red |
| A19 | HBO 1 | Brown/Black |
| A20 | HBO 2 | Brown/Red |
| A21 | HBO 3 | Brown/Green |
| A22 | HBO 4 | Brown/Pink |
| A23 | CAN 1 High | White |
| A24 | CAN 1 Low | Blue |
| A25 | HBO 6 | Pink/Brown |
| A26 | +12V Low Current Output | Red/Blue |
| A27 | Ignition 1 | Yellow/Black |
| A28 | Ignition 2 | Yellow/Red |
| A29 | Ignition 3 | Yellow/Orange |
| A30 | Ignition 4 | Yellow/Green |
| A31 | Ignition 5 | Yellow/Brown |
| A32 | Ignition 6 | Yellow/Blue |
| A33 | Ignition 7 | Yellow/Violet |
| A34 | Ignition 8 | Yellow/Grey |
Connector C
34-pin AMP, Keyway 2 - engine position, sensors, inputs, knock, wideband and CAN 2.
Looking into the connector on the VCU
| Pin | Function | Harness Wire Color |
|---|---|---|
| C1 | Trigger (Crank) + | Yellow |
| C2 | Trigger (Crank) - | Green |
| C3 | Home (Cam) + | Yellow |
| C4 | Home (Cam) - | Green |
| C5 | SPI 1 | Grey/Brown |
| C6 | SPI 2 | Grey/Red |
| C7 | SPI 3 | Grey/Orange |
| C8 | SPI 4 | Grey/Yellow |
| C9 | Sensor +8V Supply | Orange/White |
| C10 | AVI 1 | White |
| C11 | AVI 2 | White/Yellow |
| C12 | AVI 3 | White/Grey |
| C13 | AVI 4 | White/Violet |
| C14 | AVI 5 | White/Green |
| C15 | AVI 6 | White/Orange |
| C16 | AVI 7 | White/Black |
| C17 | AVI 8 | White/Brown |
| C18 | AVI 9 | White/Red |
| C19 | SPI 5 | Grey/Pink |
| C20 | SPI 6 | Grey/Light Green |
| C21 | CAN 2 High | White |
| C22 | CAN 2 Low | Blue |
| C23 | Knock 1 | White |
| C24 | Knock 2 | White |
| C25 | Sensor +5V Supply | Orange |
| C26 | Signal Ground | Black/White |
| C27 | AVI 10 | Light Green |
| C28 | AVI 11 | Light Green/Black |
| C29 | WBI 1 Heater + | Grey |
| C30 | WBI 1 Input | Yellow |
| C31 | WBI 1 Pump | Red |
| C32 | WBI 1 Nernst | Black |
| C33 | WBI 1 Heater - | White |
| C34 | WBI 1 Cal | Green |
Trigger and Home run in shielded four-core cable (Trigger: grey jacket, Home: grey/black jacket). The red +12V and black signal-ground cores in those cables land elsewhere, not on Connector C. Knock 1 and Knock 2 each run in shielded two-core cable. Shielded cables should be earthed at one end only.
Connector E
4-pin DTP - four 25A high current outputs.
Looking into the connector on the VCU
| Pin | Function | Harness Wire Color |
|---|---|---|
| E1 | 25A HCO 1 | Red/Blue |
| E2 | 25A HCO 2 | Red/Yellow |
| E3 | 25A HCO 3 | Red/Orange |
| E4 | 25A HCO 4 | Red/Green |
Pinout data taken from the Haltech Nexus R3 VCU wiring diagram (HT-193000, revision 1.2) and the Nexus R3 Quick Start Guide. This listing is the VCU only - harness, sensors and hardware are sold separately.
Kit Includes
- Haltech Nexus R3 VCU, SurLok connectors (Red and Black), Wi-Fi antenna, mounting bolts, USB-C Cable, USB-C dust cap, USB drive with NSP Software.
Applications
Engines with up to 8 cylinders or up to 4 rotors. Racing applications where advanced race features, data logging and power management control is required. Unsure about fitment for your build? Send us your engine and chassis details before ordering and we will confirm compatibility.
As a Platinum Haltech Dealer, Tuned By Shawn supports everything we sell with in-house wiring services and remote tuning over live Zoom. Questions on fitment or setup before you order, send them through and we will confirm the right parts for your build.
Customer Reviews
No reviews yet. Be the first to review this product.