Haltech Nexus R5 VCU + LSx DBW Terminated Harness (HT-195405)

This kit pairs Haltech's flagship Nexus R5 VCU with the HT-186205 terminated harness built for drive by wire LSx engines, delivering engine management, power distribution, data logging, and dual channel wideband control in a single package that wires into an LS swap or race car in hours instead of weeks. The R5 is not an ECU with extras bolted on. It is a Vehicle Control Unit that replaces the separate PDM, wideband controllers, and logger a build like this would otherwise need, and the terminated harness brings all of it to the engine with labelled, pre-terminated wiring.

What You'll Feel

An LS that starts, idles, and drives like a factory car while making race car power. Drive by wire throttle mapped the way you want it, not the way GM shipped it. Onboard dual wideband keeps closed loop fuel control accurate under boost, and the R5's processing power means torque management, boost by gear, and traction strategies all run natively without add-on boxes. Because the PDM lives inside the VCU, fuel pump and thermofan control are direct, solid state, and logged, so the entire electrical side of the engine behaves and every event is recorded.

Features

• Nexus R5 VCU: engine management, PDM, data logger, and dual channel wideband controller in one device
• 4 x 25A continuous push-pull PWM outputs for fuel pump, thermofan, transbrake, and high current loads
• 12 x 8A high side outputs for sensors, solenoids, and accessories
• 18 peak and hold injector drivers plus 12 ignition outputs
• 4 x 8A push-pull h-bridge outputs for electronic throttle
• 23 x 0-5V analogue inputs with electronic throttle redundancy
• 2 onboard wideband controllers supporting NTK and Bosch LSU 4.9 sensors
• 3 CAN ports with switchable termination
• Harness supports 8 primary injectors on EV6 plugs, with breakouts for secondary and tertiary injection
• Plug and play with the OEM LS ignition sub-harness on the engine (required)
• Universal accelerator pedal breakout, single or dual boost solenoid control, flex fuel sensor connection
• In-cabin and engine bay breakout connectors for spare I/O, transmission control, and PDM outputs

The Details

• SKU: HT-195405
• Harness: HT-186205, suits LSx engines with drive by wire throttle
• Primary injector connectors: EV6
• Fuel pump and thermofan: direct control through 25A high current outputs
• Wideband: dual onboard controllers, sensors sold separately

Kit Includes

• Nexus R5 VCU (HT-195000)
• LSx DBW terminated harness (HT-186205)
• DTM/DT connector and pin pack for terminating sensors, solenoids, and devices
• 2 x DTP-2 connectors with pre-crimped 12AWG wires for fuel pump and thermofan
• 1 x DT-8 connector with pre-crimped 18AWG wires
• Bosch 2 pin, Yazaki 2 pin, and Delco 4 pin alternator adaptor harnesses

Applications

Drive by wire LSx engine swaps and race builds: LS1 through LS7, LS3, LSA, and Gen IV truck engines running factory style DBW throttle bodies. Requires the OEM ignition sub-harness on the engine. Wideband O2 sensors are not included and are available separately.

Tuned By Shawn is a Platinum Haltech Dealer with deep LS swap wiring experience. If you want this kit terminated to your chassis or tuned remotely over a live Zoom session once it is installed, both are services we run in house.