2016 Nissan Murano Active Grille Shutter

The 2016 Nissan Murano, a stylish crossover SUV, incorporated several technologies aimed at improving fuel efficiency and aerodynamic performance. Among these, the Active Grille Shutter (AGS) system stands out as a relatively simple yet effective feature. This article delves into the specifics of the 2016 Murano's AGS, exploring its function, benefits, potential problems, and maintenance considerations. Whether you're a Murano owner, a seasoned mechanic, or simply an automotive enthusiast, this guide provides a comprehensive understanding of this often-overlooked component.

Understanding the Active Grille Shutter System

The Active Grille Shutter is essentially a set of electronically controlled louvers positioned in front of the radiator. These louvers automatically open and close based on various factors, primarily engine temperature, vehicle speed, and air conditioning system demands. The primary goal? To optimize airflow and reduce aerodynamic drag.

How it Works: A dedicated control module receives data from sensors monitoring coolant temperature, ambient air temperature, and vehicle speed. Based on this information, the module determines the optimal position of the shutters. An electric motor then actuates the louvers to either open, close, or partially open, allowing for precise control over airflow.

Why it Matters: When the engine is cold, the AGS remains closed. This helps the engine warm up faster, reducing emissions and improving fuel economy during the initial phase of operation. At higher speeds, the shutters may close to reduce aerodynamic drag, contributing to better fuel efficiency on the highway. Conversely, if the engine temperature rises too high, or if the air conditioning system requires maximum cooling, the AGS opens fully to provide maximum airflow to the radiator.

In simpler terms, imagine the AGS as a smart thermostat for your engine bay, carefully regulating airflow to maintain optimal operating conditions and minimize wasted energy.

Benefits of the Active Grille Shutter on the 2016 Murano

The incorporation of the Active Grille Shutter system in the 2016 Murano offers several tangible benefits:

Improved Fuel Efficiency: By reducing aerodynamic drag at higher speeds and promoting faster engine warm-up, the AGS contributes to an overall improvement in fuel economy. While the exact percentage varies depending on driving conditions, Nissan claimed a measurable increase in MPG compared to vehicles without the system.
Reduced Emissions: A faster engine warm-up translates to reduced emissions, particularly during cold starts when engines tend to produce higher levels of pollutants.
Enhanced Engine Performance: Maintaining optimal engine temperature is crucial for performance and longevity. The AGS helps to achieve this by preventing the engine from overheating or running too cold.
Improved Aerodynamics: Closing the grille shutters at highway speeds smooths out the airflow around the front of the vehicle, reducing drag and improving stability.

While these benefits may seem incremental individually, they contribute to a more efficient and refined driving experience overall.

Potential Problems and Troubleshooting

Like any electromechanical system, the Active Grille Shutter is susceptible to certain problems. Understanding these potential issues can help you diagnose and address them effectively.

Stuck Shutters: This is a common problem, often caused by debris (leaves, road salt, ice) obstructing the movement of the louvers. In some cases, the electric motor or control module may be faulty.
Stuck Open Shutters: This can lead to slower engine warm-up times, especially in cold weather, and potentially affect fuel economy. Again, debris, motor failure, or control module issues are potential causes.
Faulty Sensors: If the sensors providing data to the control module are malfunctioning, the AGS may not operate correctly. This can trigger a check engine light and affect engine performance.
Wiring Issues: Damaged or corroded wiring can disrupt the communication between the sensors, control module, and electric motor, leading to AGS malfunctions.

Troubleshooting Tips:

Visual Inspection: Begin by visually inspecting the AGS for any obvious obstructions, such as leaves, ice, or road debris. Carefully remove any obstructions.
Diagnostic Scan: Use an OBD-II scanner to check for any trouble codes related to the AGS. These codes can provide valuable clues about the source of the problem. Common codes related to the AGS include B1079 (Active Grille Air Shutter System), and related circuit faults.
Motor Test: If the shutters are stuck, test the electric motor using a multimeter to check for voltage and continuity. A faulty motor will need to be replaced.
Wiring Check: Inspect the wiring harness and connectors for any signs of damage or corrosion. Repair or replace any damaged wiring.
Sensor Testing: Use a multimeter to test the sensors providing data to the control module. Refer to the 2016 Murano service manual for specific testing procedures and acceptable voltage ranges.

DIY vs. Professional Repair: Simple issues like removing debris or checking wiring connections can often be addressed by a competent DIY mechanic. However, more complex problems involving the electric motor, control module, or sensor replacement may require the expertise of a qualified automotive technician.

Maintenance Considerations

While the Active Grille Shutter system is relatively low-maintenance, performing some preventative measures can help ensure its proper operation and longevity.

Regular Cleaning: Periodically inspect the AGS for debris and clean it thoroughly. Use a soft brush and mild detergent to remove any dirt or grime.
Wiring Inspection: Regularly inspect the wiring harness and connectors for any signs of damage or corrosion. Apply dielectric grease to the connectors to prevent corrosion.
Professional Inspection: During routine maintenance appointments, ask your mechanic to inspect the AGS for proper operation and any signs of wear or damage.

Cost of Repair: The cost of repairing or replacing the Active Grille Shutter system can vary depending on the specific problem and the parts required. A simple cleaning or wiring repair may cost relatively little, while replacing the electric motor or control module can be more expensive. Expect to pay anywhere from $200 to $600 for AGS-related repairs, including parts and labor. Genuine Nissan parts will generally be more expensive than aftermarket alternatives.

Comparing the 2016 Murano's AGS to Other Vehicles

The use of Active Grille Shutter systems is becoming increasingly common in modern vehicles as manufacturers strive to improve fuel efficiency and reduce emissions. While the basic principle remains the same, the specific implementation can vary from one vehicle to another.

Compared to some more complex AGS designs, the 2016 Murano's system is relatively straightforward. Some vehicles use more sophisticated systems with multiple sets of shutters or variable shutter angles. However, the Murano's simple design contributes to its reliability and ease of maintenance.

Other vehicles in the same class as the Murano, such as the Ford Edge and Toyota Venza, also utilize AGS systems. The performance and reliability of these systems are generally comparable, although specific issues may vary depending on the manufacturer and design.

Conclusion

The Active Grille Shutter system on the 2016 Nissan Murano is a valuable feature that contributes to improved fuel efficiency, reduced emissions, and enhanced engine performance. While it is generally reliable, understanding its function, potential problems, and maintenance considerations can help you keep your Murano running smoothly for years to come. By performing regular inspections and addressing any issues promptly, you can maximize the benefits of this often-overlooked technology.