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 dual wideband control natively. Fuel pump and thermofan control are direct, solid state, and logged.

Features

  • Engine management, PDM, data logger, and dual wideband controller in one device
  • 10 x 25A-capable outputs across high current channels
  • Peak and hold injector drivers and DBW support
  • Dual onboard wideband controllers (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.

A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34

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.

C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34

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.

E4
E1
E3
E2

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.