ECU OVERVIEW Haltech’s Nexus S2 is the successor to the acclaimed Elite 1500, offering a serious upgrade in performance and functionality. The S2 combines all the classic functionality of the Elite 1500 with new features and the superior processing power of the successful Nexus platform. 4 x peak/hold injector drivers (can be used as low side drive outputs) 4 x low current ignition outputs (can be used as low side drive outputs) 6 x low side drive outputs, PWM capable (DPOs) 4 x push-pull / half bridge outputs (8A, PWM capable), eg for electronic throttle 1 x ECR output 11 x 0-5V analog inputs with redundancy for electronic throttle and switchable 5V pullup Trigger and home inputs with differential inputs, adjustable thresholds and glitch filters 6 x synchronous pulsed inputs, zero crossing or adjustable thresholds – cam sensor inputs, frequency inputs or 0-5V analog inputs 1 x on-board wideband controller, supporting NTK and LSU4.9 1 x on-board 4 bar MAP sensor 2 x CAN ports with switchable termination If you are using a factory harness and are after an easy ECU upgrade, take a look at Haltech Plug ‘n’ Play Adapter Kits. These adapters plug directly into your Haltech ECU and have a set of factory connectors on the other side which plug straight into the factory harness. A simple Haltech Plug ‘n’ Play product that allows you to be up and running in just a few hours. The quick start guide will walk you through installation of the Haltech Plug ‘n’ Play adapter into your vehicle.

Suits: Plug ‘n’ Play replacement of the factory ECU for VW/Audi 1.8T AWP ONLY (2001-2006) Volkswagen Golf Mk4 GTI, Bora/Jetta, Beetle, Polo GTI, Audi A3, A4 Quattro Sport, TT Mk1 (8N), Skoda Octavia vRS & SEAT Leon, Toledo. Manual transmission only.

Includes: Nexus S2 ECU, Overmoulded molded plug ‘n’ play adaptor harness, M14 x 1.5 air temp sensor with matching plug and pins, auxiliary I/O 6 Pin DTM06-6P and pins.

Notes: The CAN dash support was developed on a 2003 VW Beetle – other models may not be supported or have reduced dash functionality. Using a Nexus S2 instead of a Nexus S3 will reduce some of the car’s factory functionality. Refer to the quick start guide for details.

Features ECU FEATURES Controlled via NSP (Nexus Software Programmer) Long Term Learning Stepper Motor Control 4D Closed Loop Boost Control Closed Loop CO2 Control Rotational Idle Launch Control Traction Control Anti-Lag Dual Knock Control Trans Brake Control Race Timer Multi Stage Fuel Injection Multi-level Engine Protection 6 Stage Nitrous Control 4-sensor variable cam control Intake Air Bleed Control Flat Shift Control Shock Travel & Ride Height Control Advanced Torque Management On-board Wi-Fi On-board datalogging (128MB) AUTOMATIC TRANSMISSION CONTROL Ford AODE/4R70W GM 4L60E GM 4L80E Toyota A340E Lenco Liberty This harness when installed in conjunction with a Haltech Nexus S3 ECU opens the door to virtually limitless performance modification and tuning of your vehicle. Fully programmable systems allow you to extract all the performance from your engine by delivering precisely the required amount of fuel and ignition timing that your engine requires for maximum output under all operating conditions.