Nissan 6303, 6802 installation manual Upgrading ECU MAF hardware, 1984-1986 CR31/Z31/VLT

Models: 6303 6802

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9. Upgrading ECU MAF hardware

Early model engine control units such as Z31, R31, most HR31 (1985-1988) and VL Turbo use a 2 -7 volt hotwire airflow meter. These air flow meters then have their voltage converted to 0 - 5 volts for the internal microprocessor using what is known as 'opamp' circuitry.

The later model ECUs and airflow meters all work on 0 - 5 volt circuitry.

When installing a later model mass airflow meter from a later model vehicle to one of these earlier model vehicles, it is necessary to modify the ECU hardware to handle the difference in air flow meter voltage.

This is done by either altering or removing the circuitry path via the opamp, and then limiting the maximum voltage using a zener diode. These instructions details the steps to take when modifying the ECU

Further instructions regarding MAF pinouts are available in the Software Users Manual.

1984-1986 CR31/Z31/VLT

1.Locate the op amp surface mount board in your ECU as pictured below

2.Remove pin 14 on RHS of mini board

Do this by applying heat to the top of the connector and then pushing away from the mini board with a flat blade screw driver. Then using tweezers to hold the connectors, heat the opposite side of the circuit board to remove the connector completely.

5.Install the Zener diode to the reverse side of the ECU. Zener diode is available from us or from Altronics (Australia) or Dick Smith (Australia) as well as other electronics components shops worldwide: http://www.altronics.com.au/index.asp?area=item&id=Z0314

Pictured below with banded end of the zener diode facing the installed AFM signal jumper wire. The other end is connected to the ground pin of the mini board. This will limit the voltage from the AFM to 5.1 volts

NIStune Type 1 Hardware Installation

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Nissan 6303, 6802 installation manual Upgrading ECU MAF hardware, 1984-1986 CR31/Z31/VLT

6303, 6802 specifications

Nissan, a renowned automotive manufacturer, has carved a niche in the competitive market with its unique lineup of vehicles, among which the Nissan 6802 and 6303 stand out prominently. These models have been developed to cater to the ever-evolving demands of modern consumers, offering a blend of performance, comfort, and innovative technologies.

The Nissan 6802 is designed with an emphasis on efficiency and performance. One of its main features includes a robust engine that delivers an impressive power output while maintaining optimal fuel economy. This model is equipped with advanced aerodynamics to reduce drag, enhancing both fuel efficiency and stability at high speeds. The 6802 also boasts a spacious interior, fitted with high-quality materials and state-of-the-art infotainment systems that provide drivers with connectivity and convenience on the go.

In terms of safety, the Nissan 6802 is equipped with an array of advanced driver-assistance systems, including adaptive cruise control, lane departure warning, and automatic emergency braking. These technologies work together to provide a safer driving experience, making it suitable for both urban settings and long-distance travel.

On the other hand, the Nissan 6303 takes a more compact approach, focusing on urban mobility without sacrificing performance. This model features a lightweight chassis, which contributes to its agile handling and responsiveness in city driving conditions. The 6303 is powered by an efficient engine, designed to offer a balanced mix of power and fuel economy, making it an ideal choice for daily commutes.

The Nissan 6303 also incorporates cutting-edge technology, such as a digital cockpit that integrates navigation, entertainment, and vehicle information into an easily accessible interface. Furthermore, its compact design allows for versatile space utilization, making it easier to maneuver in congested areas.

Both models emphasize sustainability, with Nissan implementing eco-friendly production techniques and materials. The inclusion of electric options in these lineups reflects the company’s commitment to reducing carbon footprints and promoting greener alternatives for consumers.

In summary, the Nissan 6802 and 6303 are remarkable vehicles that showcase the brand’s dedication to innovation, performance, and safety. With their distinct characteristics and technologies, they cater to a wide range of drivers, enhancing the Nissan experience in different segments of the market.