What Is The Largest Mazda Suv

Let's talk about the biggest beast in the Mazda SUV lineup: the CX-90. This article will break down its key features, specs, and even offer some troubleshooting advice, just like you'd get from your favorite wrench-turning buddy. We'll focus on understanding the CX-90 well enough to tackle basic maintenance and repairs. I have also attached a detailed component diagram that you can download below.

Purpose

Why even bother understanding the intricacies of the CX-90? There are several reasons:

Repairs and Maintenance: Knowing the core components and how they interact can save you serious money on simple fixes. Replacing a sensor yourself is way cheaper than a dealership visit.
Modding and Upgrades: If you're thinking about adding performance parts, changing the suspension, or even upgrading the infotainment system, understanding the underlying technology is crucial.
Preventive Maintenance: Catching problems early can prevent major breakdowns. Knowing the symptoms of common issues empowers you to address them before they snowball.
General Knowledge: Let's face it, it's just cool to know how your car works!

Key Specs and Main Parts

The CX-90 is a three-row SUV, meaning it offers seating for up to eight passengers depending on the configuration. Here's a rundown of the vital specs:

Engine Options: The CX-90 offers both a turbocharged 3.3-liter inline-six engine and a plug-in hybrid (PHEV) variant with a 2.5-liter four-cylinder engine. The standard engine boasts impressive horsepower and torque figures.
Transmission: An eight-speed automatic transmission is standard across the range, ensuring smooth gear changes and efficient power delivery.
Drivetrain: All-wheel drive (AWD) is standard on all CX-90 models. This i-Activ AWD system uses sensors to monitor road conditions and driving style, automatically adjusting torque distribution between the front and rear axles for optimal traction.
Suspension: Typically, the CX-90 utilizes a MacPherson strut front suspension and a multi-link rear suspension. This setup provides a good balance of ride comfort and handling. Some higher trim levels may include adaptive dampers for a more refined ride.
Braking System: Four-wheel disc brakes with anti-lock braking system (ABS) and electronic brakeforce distribution (EBD) provide strong and reliable stopping power.

Main Parts Breakdown:

Engine: The heart of the CX-90. Understanding its internal combustion process (fuel injection, ignition, etc.) is key for diagnostics.
Transmission: This system transfers power from the engine to the wheels. Common issues include slipping, hard shifting, and fluid leaks.
Drivetrain (AWD System): This intricate system includes the transfer case, differentials, and driveshafts. AWD systems are more complex than two-wheel-drive systems, so be extra cautious when working on them.
Suspension System: Crucial for ride quality and handling. Components include struts, shocks, springs, control arms, and bushings.
Braking System: The system's master cylinder, brake lines, calipers, rotors, and pads are all essential for safety.
Electrical System: Includes the battery, alternator, starter, and all the wiring harnesses. Modern cars rely heavily on their electrical systems, so understanding the basics is vital.
Body and Chassis: The underlying structure of the vehicle. Look for signs of rust or damage, especially after an accident.

Symbols and Diagram

Unfortunately, including a dynamically interactive diagram within this text-based format isn't possible. However, I've prepared a simplified diagram of the CX-90's powertrain components for download at the end of this document. Here's a general overview of what you might find in a typical automotive diagram:

Lines: Solid lines represent physical connections (e.g., hoses, wires), while dashed lines might indicate vacuum lines or control signals.
Colors: Color coding is used to differentiate between various systems (e.g., fuel lines might be red, coolant lines might be blue).
Icons: Standardized icons represent components like sensors, actuators, relays, and fuses.
Abbreviations: Common abbreviations include ECU (Engine Control Unit), ABS (Anti-lock Braking System), and TPMS (Tire Pressure Monitoring System).

How It Works

The CX-90 operates like most modern vehicles, but its all-wheel-drive system adds a layer of complexity.

Combustion: The engine burns fuel and air to generate power.
Power Transmission: The transmission converts the engine's power into usable torque and speed, sending it to the transfer case.
AWD Distribution: The transfer case splits the power between the front and rear axles. The i-Activ AWD system uses sensors to monitor wheel slip, steering angle, and throttle position, adjusting the torque split accordingly.
Wheel Drive: The differentials on the front and rear axles allow the wheels to rotate at different speeds, which is essential for cornering.
Suspension and Steering: The suspension system absorbs bumps and keeps the tires in contact with the road, while the steering system allows you to control the vehicle's direction.
Braking: The braking system uses friction to slow down or stop the vehicle. ABS prevents the wheels from locking up during hard braking, allowing you to maintain steering control.

Real-World Use - Basic Troubleshooting Tips

Here are a few common problems you might encounter and some basic troubleshooting steps:

Engine Misfires: Could be caused by faulty spark plugs, ignition coils, or fuel injectors. Check for diagnostic trouble codes (DTCs) using an OBD-II scanner.
Transmission Slipping: Could be caused by low transmission fluid, worn clutches, or a faulty valve body. Check the fluid level and condition.
AWD System Malfunction: Could be caused by a faulty sensor, a worn transfer case, or a problem with the differentials. Check for DTCs related to the AWD system.
Suspension Noises: Could be caused by worn bushings, ball joints, or struts. Inspect the suspension components for damage.
Brake Squealing: Could be caused by worn brake pads or rotors. Check the brake pad thickness and rotor condition.

Safety

Working on vehicles can be dangerous. Here are a few key safety precautions:

Disconnect the Battery: Always disconnect the negative battery cable before working on the electrical system.
Use Jack Stands: Never work under a vehicle supported only by a jack. Use jack stands to provide a stable support.
Wear Safety Glasses: Protect your eyes from debris.
Handle Fuel Safely: Fuel is highly flammable. Work in a well-ventilated area and avoid sparks.
High-Pressure Fuel Systems: Be extremely careful when working on the fuel system. Residual pressure can cause serious injury. Depressurize the system before disconnecting any fuel lines.
Airbags: Airbags are potentially explosive. If you are working near an airbag, consult the service manual for proper deactivation procedures. Improper handling can cause accidental deployment, resulting in serious injury.

Risky Components:

Fuel System: As mentioned above, high pressure and flammable fuel are a dangerous combination.
Electrical System: High voltage can cause electric shock.
Airbag System: Improper handling can cause accidental deployment.
Suspension Springs: Highly compressed springs can release with tremendous force, causing serious injury. Use spring compressors properly.

Remember, if you are not comfortable performing a repair, it is always best to consult a qualified mechanic.

Download the detailed powertrain diagram of the CX-90 (including components and sensors) here.