The Can-Am Commander, known for its ruggedness and off-road prowess, often comes equipped with an air suspension system designed to provide a smoother ride and adjustable ground clearance. However, like any complex system, air suspension is not immune to problems. Dealing with a sagging rear end, a constantly running compressor, or an unresponsive suspension can quickly turn an enjoyable ride into a frustrating experience. Understanding the common issues and knowing how to diagnose and address them is crucial for keeping your Commander running smoothly and maintaining its optimal performance.

Why is My Commander's Air Suspension Acting Up? Let's Investigate!

Air suspension systems, while offering several benefits, are susceptible to a range of issues due to their complexity. The system relies on a network of components working in harmony, and a failure in any one area can lead to noticeable problems. Several factors can contribute to these issues, ranging from environmental conditions to the age and maintenance of the system. Let's break down some of the most common culprits:

1. Leaks, Leaks, Leaks!

Air leaks are arguably the most frequent cause of air suspension problems. They can occur in various locations, including:

  • Air Springs (Bags): These are the inflatable bladders that provide the cushioning. Over time, the rubber material can degrade, crack, or develop pinhole leaks due to age, exposure to UV rays, or debris.
  • Air Lines: These hoses connect the various components of the system. They can become brittle and cracked with age, especially in extreme temperatures. Abrasion from rubbing against the frame or other components can also cause leaks.
  • Fittings: Where the air lines connect to the air springs, compressor, valve block, and other components, fittings are used to create an airtight seal. These fittings can loosen, corrode, or develop cracks, leading to air leaks.
  • Valve Block: This component controls the distribution of air to the individual air springs. Internal seals within the valve block can fail, leading to leaks and improper air distribution.

How to Spot a Leak:

  • Listen Closely: With the engine off, listen for a hissing sound near the air springs, air lines, or compressor.
  • The Soapy Water Test: Mix a solution of soapy water (dish soap works well) and spray it onto the suspected leak areas. Bubbles will form where air is escaping.
  • Sagging Vehicle: A noticeable drop in ride height on one or more corners of the vehicle, especially overnight, is a strong indicator of a leak.

2. Compressor Troubles

The air compressor is the heart of the system, responsible for supplying the air pressure to inflate the air springs. Several issues can affect its performance:

  • Worn Seals and Pistons: Over time, the internal components of the compressor, such as the piston rings and seals, can wear down, reducing its ability to generate sufficient pressure.
  • Moisture Damage: Condensation can build up inside the compressor, leading to corrosion and damage to internal components. Many compressors have a desiccant dryer to remove moisture, but these can become saturated over time.
  • Electrical Problems: The compressor relies on a functioning electrical circuit. Faulty wiring, a blown fuse, or a bad relay can prevent the compressor from running.
  • Overworking: If there are leaks in the system, the compressor will run constantly to compensate, leading to premature wear and eventual failure.

Signs of a Failing Compressor:

  • Slow Inflation: The air suspension takes an excessively long time to reach the desired ride height.
  • Constant Running: The compressor runs frequently or continuously, even when the vehicle is at the correct ride height.
  • Noisy Operation: Unusual noises, such as grinding or squealing, from the compressor.
  • Error Codes: The vehicle's diagnostic system may display error codes related to the air suspension system.

3. Electrical Gremlins

The air suspension system relies on a complex network of sensors, wires, and control modules. Electrical problems can manifest in various ways:

  • Faulty Ride Height Sensors: These sensors monitor the vehicle's ride height and send signals to the control module. If a sensor fails, the system may not be able to maintain the correct ride height.
  • Wiring Issues: Damaged or corroded wiring can disrupt the flow of signals between the various components.
  • Control Module Malfunctions: The control module is the brain of the system. A faulty module can lead to erratic behavior or complete system failure.
  • Blown Fuses or Relays: A blown fuse or a faulty relay can interrupt the power supply to the compressor or other components.

Symptoms of Electrical Issues:

  • Error Codes: The vehicle's diagnostic system may display error codes related to the air suspension system.
  • Erratic Ride Height: The vehicle's ride height may fluctuate unexpectedly.
  • System Inactivity: The air suspension system may not respond to adjustments.

4. Environmental Factors

The harsh conditions that Can-Am Commanders often operate in can take a toll on the air suspension system:

  • Extreme Temperatures: Extreme heat or cold can cause the rubber components to degrade and crack.
  • Mud and Debris: Mud, dirt, and debris can accumulate on the air springs and other components, accelerating wear and tear.
  • Corrosion: Exposure to salt, water, and other corrosive elements can damage metal components.

5. Lack of Maintenance

Like any other system on your vehicle, the air suspension system requires regular maintenance to ensure optimal performance and longevity.

  • Inspecting Components: Regularly inspect the air springs, air lines, fittings, and compressor for signs of wear, damage, or leaks.
  • Cleaning: Clean the air springs and other components to remove mud, dirt, and debris.
  • Desiccant Dryer Replacement: Replace the desiccant dryer in the compressor regularly to prevent moisture damage.

Diagnosing the Problem: Becoming an Air Suspension Detective

Before you start replacing parts, it's important to accurately diagnose the problem. Here's a step-by-step approach:

  1. Visual Inspection: Start with a thorough visual inspection of all the components. Look for signs of leaks, damage, or corrosion.

  2. Listen for Leaks: With the engine off, listen for hissing sounds near the air springs, air lines, and compressor.

  3. The Soapy Water Test: Use a soapy water solution to check for leaks in suspected areas.

  4. Check the Compressor: Observe the compressor's operation. Is it running frequently or constantly? Is it making unusual noises?

  5. Check Fuses and Relays: Inspect the fuses and relays related to the air suspension system to ensure they are in good working order.

  6. Scan for Error Codes: Use a diagnostic scanner to check for error codes related to the air suspension system. This can provide valuable clues about the source of the problem.

  7. Test Ride Height Sensors: If you suspect a ride height sensor is faulty, you can test it with a multimeter. Consult your vehicle's service manual for instructions.

Fixing the Issue: Your Repair Options

Once you've identified the problem, you have several options for fixing it:

  • DIY Repair: If you're mechanically inclined, you may be able to repair some issues yourself. Replacing air springs, air lines, and fittings are common DIY repairs. However, more complex repairs, such as compressor rebuilds or control module replacements, may require specialized tools and knowledge.
  • Professional Repair: If you're not comfortable working on the air suspension system yourself, it's best to take your vehicle to a qualified mechanic. They have the expertise and equipment to diagnose and repair the problem correctly.
  • Air Suspension Delete: For some owners, especially those who frequently encounter off-road conditions, deleting the air suspension system and replacing it with a traditional coil spring suspension is a viable option. This eliminates the potential for air suspension problems but also removes the benefits of adjustable ride height and a smoother ride.

Preventing Future Problems: A Proactive Approach

Preventing air suspension problems is always better than fixing them. Here are some tips to keep your system in good working order:

  • Regular Inspections: Regularly inspect the air springs, air lines, and compressor for signs of wear, damage, or leaks.
  • Cleaning: Keep the air springs and other components clean to prevent the accumulation of mud, dirt, and debris.
  • Desiccant Dryer Replacement: Replace the desiccant dryer in the compressor regularly to prevent moisture damage.
  • Avoid Overloading: Avoid overloading your vehicle, as this can put excessive strain on the air suspension system.
  • Proper Storage: If you're storing your vehicle for an extended period, inflate the air springs to the recommended pressure to prevent them from drying out and cracking.

Frequently Asked Questions

Q: Why is my air compressor running all the time?

A: This usually indicates a leak in the system, causing the compressor to constantly work to maintain pressure. It could also be a faulty pressure sensor or relay.

Q: How do I find an air leak in my suspension?

A: Use a spray bottle with soapy water and apply it to all air connections, lines, and the air springs. Bubbles will form where there's a leak.

Q: How long do air springs typically last?

A: Air spring lifespan varies depending on usage and conditions, but generally, they last between 5 to 10 years. Regular inspection and maintenance can extend their life.

Q: Can I drive my Can-Am Commander with a broken air suspension?

A: It's not recommended. Driving with a failed air suspension can damage other components and compromise handling and safety.

Q: How much does it cost to repair air suspension?

A: Costs vary significantly depending on the problem, but expect to pay anywhere from a few hundred dollars for a simple repair to several thousand for a complete system overhaul.

Conclusion

Dealing with air suspension problems on your Can-Am Commander can be frustrating, but by understanding the common issues, knowing how to diagnose them, and taking a proactive approach to maintenance, you can keep your system running smoothly and enjoy the benefits of a comfortable and adjustable ride. Prioritizing regular inspections and addressing small issues promptly will save you time and money in the long run.