Description

The HKS F-CON Harness NP5-21 is a specialized, professional-grade wiring interface. It is designed exclusively for authorized HKS Power Writer shops to install the F-CON V Pro Ver. 3.4 or Ver. 4.0 engine management systems into the Nissan GT-R R35.

This harness provides the critical electrical connection between the F-CON unit and the vehicle’s factory ECU. It enables comprehensive control of fuel, ignition, boost, and variable valve timing. This harness is a mandatory component for a professional F-CON V Pro installation.

Product Overview & Purpose

This harness is not a plug-and-play tuning device. It is the essential wiring infrastructure that allows a professional tuner to integrate a standalone or semi-standalone HKS F-CON V Pro ECU into the GT-R’s complex electrical system. By ensuring proper signal interception and transmission, it allows for precise engine control. Thus, it is a core part of any high-level, custom-tuned GT-R build.

Product Highlights & Critical Application Notes

🔌 Professional Installation & Tuning Required
This product is exclusively for authorized HKS Power Writer shops and professional tuners. Installation and subsequent tuning require advanced expertise in GT-R electronics and engine management.

⚠️ Important Operational Behaviors & Solutions

• Check Engine Light & Idle Behavior: Installation of this harness will typically cause the check engine light to illuminate due to fuel trim (AFR) abnormalities. Consequently, idle speed will increase to approximately 1050 RPM. While drivable, this is not ideal for daily use.

• Solution for Lamp Illumination: To suppress these check engine lights and restore normal idle, the separately sold F-CON V Pro CF Adapter is required when using variable valve timing control with F-CON V Pro Ver. 4.0.

• Air Flow Sensor Retention: It is generally advised not to remove the factory air flow sensors, as simulating their signal can lead to increased transmission shift shock.

• Compatibility: For use only with F-CON V Pro Ver. 3.4 or Ver. 4.0.

Technical Specifications

• Product Name: F-CON Harness NP5-21 for R35 GT-R

• Model Code: 42002-AN010

• Compatibility: Nissan GT-R R35 (VR38DETT, December 2007 onward).

• Function: Interface wiring harness for F-CON V Pro Ver. 3.4 / 4.0 engine management systems.

• Note: This is a Power Writer Shop exclusive product. Not for general consumer installation.

Performance Philosophy

• Goal: To serve as the reliable, vehicle-specific wiring backbone that enables the full capabilities of the professional-grade F-CON V Pro ECU in the GT-R platform. The focus is on providing a robust, customizable interface for ultimate engine control in competition or extreme performance builds.

• Focus: A mandatory professional tool for competition-level tuning. It is designed for shops building the highest-level GT-Rs for time attack, drag racing, or dyno competition, where complete control over every engine parameter is non-negotiable.

Installation & Usage Disclaimer

• 🔧 AUTHORIZED PROFESSIONAL INSTALLATION ONLY
  This product is not for DIY installation. It must be installed, configured, and the vehicle must be professionally tuned by an authorized HKS Power Writer shop. Improper installation can cause driveability issues or engine damage.