How To Start Nissan Altima With Key

The Nissan Altima, a stalwart in the mid-size sedan segment, offers a blend of reliability and comfort that appeals to a wide range of drivers. Whether you're a seasoned mechanic or a first-time Altima owner, understanding the starting procedure, including potential troubleshooting, is crucial. This guide details the process of starting a Nissan Altima with a key, covering different generations and potential issues.

Starting a Standard Key Ignition Altima

This section focuses on Altima models equipped with a traditional key ignition system. This applies primarily to earlier generations, although some newer models might still retain this system as a base trim feature.

Step-by-Step Starting Procedure

1. Insert the Key: Locate the ignition switch, typically found on the right side of the steering column. Insert the Nissan Altima key fully into the ignition cylinder.
2. Turn to the 'ACC' Position: Rotate the key clockwise to the 'ACC' (Accessory) position. This activates the car's electrical accessories, such as the radio and climate control, without starting the engine.
3. Turn to the 'ON' Position: Continue rotating the key clockwise to the 'ON' position. In this position, the instrument cluster lights up, and the car's systems perform self-checks. Wait for a few seconds in this position to allow the fuel pump to prime the fuel lines. This is especially important in colder weather.
4. Turn to the 'START' Position: Rotate the key further clockwise to the 'START' position and hold it there. This engages the starter motor, which cranks the engine. Once the engine starts, release the key immediately. It will automatically return to the 'ON' position. Avoid holding the key in the 'START' position for an extended period after the engine has started, as this can damage the starter motor.

Troubleshooting Starting Issues with a Standard Key

Several issues can prevent a Nissan Altima from starting with a standard key. Here are some common problems and potential solutions:

• Dead Battery: This is one of the most common culprits. Check the battery voltage with a multimeter. A healthy battery should read around 12.6 volts. If the voltage is significantly lower, the battery may need to be charged or replaced. Use jumper cables and another vehicle to jump-start the Altima. Let the engine run for a while to recharge the battery.
• Faulty Starter Motor: If you hear a clicking sound when you turn the key to the 'START' position, the starter motor might be failing. A mechanic can test the starter motor directly to confirm this. Replacement is usually the only solution.
• Ignition Switch Problems: A worn or damaged ignition switch can prevent the car from starting. Symptoms include difficulty turning the key, the engine not cranking, or the accessories not working. A diagnostic test can confirm the ignition switch is the issue.
• Fuel System Issues: Problems with the fuel pump, fuel filter, or fuel injectors can prevent the engine from getting fuel. Listen for the fuel pump priming when you turn the key to the 'ON' position. A clogged fuel filter or failing fuel pump will require replacement.
• Immobilizer Problems: The Nissan Altima has an immobilizer system that prevents the car from starting if the correct key is not used. If the immobilizer light on the instrument cluster is flashing, there may be an issue with the key or the immobilizer system itself. Try using a spare key. If that doesn't work, a locksmith or Nissan dealer can reprogram the key or diagnose the immobilizer system.

Starting a Keyless Ignition (Intelligent Key) Altima

Many newer Nissan Altima models are equipped with a keyless ignition system, also known as an Intelligent Key system. This system allows you to start the car without physically inserting a key into the ignition.

Step-by-Step Starting Procedure

1. Ensure the Intelligent Key is Present: The Intelligent Key must be inside the vehicle, typically in your pocket or purse. The car's system needs to detect the key's presence for the starting procedure to work.
2. Depress the Brake Pedal: Firmly press and hold the brake pedal. This is a safety requirement for starting the car.
3. Press the Start/Stop Button: Locate the Start/Stop button, usually on the dashboard. Press the button once while holding the brake pedal. The engine should start.

Troubleshooting Starting Issues with an Intelligent Key

Starting issues with an Intelligent Key system can stem from various sources. Here are common problems and solutions:

• Weak Intelligent Key Battery: A weak battery in the Intelligent Key can prevent the car from detecting the key's presence. Replace the battery in the Intelligent Key with a new CR2032 battery. Refer to your owner's manual for instructions on how to replace the battery.
• Interference: Electronic interference from other devices can sometimes disrupt the signal between the key and the car. Try moving away from potential sources of interference, such as cell phones or other electronic devices.
• Faulty Start/Stop Button: A malfunctioning Start/Stop button can prevent the car from starting. A mechanic can diagnose the button's functionality. Replacement might be necessary.
• Immobilizer Issues: As with the standard key system, immobilizer issues can also prevent the car from starting with an Intelligent Key. The Nissan Anti-Theft System needs to recognize the key signal. Check for a flashing security indicator light on the dash. If present, attempt to start the vehicle with the spare intelligent key. If both keys trigger this indicator, you may have a fault with the immobilizer receiver in the vehicle.
• Brake Switch Problems: The car's system requires confirmation that the brake pedal is depressed before starting. A faulty brake switch can prevent the car from starting, even if the brake pedal is depressed. A diagnostic scan tool can reveal this fault.

Emergency Start Procedure (Intelligent Key)

If the Intelligent Key battery is completely dead, you might still be able to start the Nissan Altima using an emergency start procedure.

1. Position the Key: Consult your owner's manual for the exact location where the key needs to be positioned. Typically, you will hold the Intelligent Key very close to the Start/Stop button.
2. Press the Start/Stop Button: While holding the key in the specified position, press the Start/Stop button. The car should start.

General Maintenance Tips for Reliable Starting

Preventative maintenance can significantly reduce the likelihood of starting problems. Here are some key maintenance tips:

• Battery Maintenance: Regularly check the battery terminals for corrosion and clean them as needed. Ensure the battery is securely mounted. Have the battery tested periodically, especially before winter.
• Fuel System Maintenance: Replace the fuel filter according to the manufacturer's recommendations. Use high-quality fuel to prevent fuel injector clogs.
• Regular Oil Changes: Regular oil changes help keep the engine running smoothly and prevent wear and tear on critical components.
• Spark Plug Replacement: Replace spark plugs according to the manufacturer's recommended interval. Worn spark plugs can make it difficult to start the engine.

Diagnostic Tools and Techniques

For more complex starting problems, diagnostic tools and techniques are essential. Here are some common tools used by mechanics:

• Multimeter: Used to measure voltage, current, and resistance. Essential for testing the battery, starter motor, and other electrical components.
• OBD-II Scanner: Used to read diagnostic trouble codes (DTCs) from the car's computer. These codes can provide valuable clues about the source of the problem.
• Fuel Pressure Tester: Used to measure fuel pressure. Helps diagnose fuel system problems.
• Starting System Analyzer: Professional grade tool designed to check the starting components. Provides a complete analysis of the battery, starter and charging system.

By understanding the starting procedure and potential troubleshooting steps, you can keep your Nissan Altima running reliably for years to come. Proper maintenance and the use of diagnostic tools are crucial for identifying and resolving starting problems quickly and efficiently.