Full Accessory Power Active is a feature found in many modern vehicles, particularly Ford models, that allows the use of electrical systems and accessories without starting the engine. This mode enables drivers to operate various functions like the radio, windows, and climate control while conserving fuel and reducing unnecessary wear on the engine. However, it can sometimes lead to confusion or issues if not properly understood or managed.
When the Full Accessory Power Active mode is engaged, the vehicle’s electrical systems are powered by the battery, allowing for the use of certain features without the engine running. This can be particularly useful in situations where you want to use the car’s amenities without idling the engine, such as waiting for someone or enjoying music while parked.
| Full Accessory Power Active | Engine Running |
|---|---|
| Electrical systems on | All systems operational |
| Engine off | Engine on |
| Limited battery usage | Battery charging |
| Reduced fuel consumption | Normal fuel consumption |
Understanding Full Accessory Power Active Mode
The Full Accessory Power Active mode is designed to provide convenience and functionality without the need to start the engine. This feature is particularly common in vehicles equipped with push-button start systems. When activated, it allows the use of various electrical components such as the infotainment system, power windows, and climate control, all while the engine remains off.
One of the primary benefits of this mode is energy conservation. By allowing the use of certain features without running the engine, it helps reduce unnecessary fuel consumption and emissions, especially during short stops or when waiting in the vehicle. This can be particularly advantageous in situations where you need to use the car’s amenities but don’t require the engine to be running, such as listening to the radio while parked or using the climate control system while waiting for someone.
However, it’s important to note that prolonged use of the Full Accessory Power Active mode can drain the vehicle’s battery. The system relies on the car’s 12-volt battery to power the electrical components, and extended use without running the engine to recharge the battery can lead to a depleted battery, potentially causing starting issues.
Most modern vehicles are designed with safeguards to prevent complete battery drainage. These systems may automatically shut off certain features or provide warnings when the battery charge reaches a critical level. Nevertheless, it’s crucial for drivers to be aware of their battery’s condition and the duration of accessory use to avoid unexpected issues.
Activating and Deactivating Full Accessory Power Active Mode
Knowing how to properly activate and deactivate the Full Accessory Power Active mode is essential for utilizing this feature effectively. The process can vary slightly depending on the specific Ford model, but generally follows a similar pattern across the brand’s vehicle lineup.
To activate Full Accessory Power Active mode in most Ford vehicles:
- Ensure the vehicle is in park (P) for automatic transmissions or neutral for manual transmissions
- Press the start/stop button once without depressing the brake pedal
- The dashboard will illuminate, and you’ll see a message indicating “Full Accessory Power Active”
- You can now use various electrical features without starting the engine
Deactivating the mode is equally important to prevent battery drain:
- Press the start/stop button again without depressing the brake pedal
- All electrical systems will power down
- Alternatively, to start the engine, press the brake pedal and then the start/stop button
It’s crucial to remember that leaving your vehicle in Full Accessory Power Active mode for extended periods can deplete the battery. Always be mindful of the duration you use this feature, especially if you plan to start your vehicle soon after.
For vehicles with traditional key ignitions, the process might involve turning the key to the “ACC” or accessory position without fully starting the engine. Consult your vehicle’s owner manual for specific instructions related to your model.
Common Issues and Troubleshooting
While the Full Accessory Power Active mode is designed to be a convenient feature, it can sometimes lead to issues or confusion for vehicle owners. Understanding common problems and how to address them can help ensure a smoother experience with your Ford vehicle.
One of the most frequent issues is a vehicle that won’t start after being left in Full Accessory Power Active mode. This is often due to a drained battery, especially if the mode was left active for an extended period. If you encounter this problem:
- Attempt to jump-start the vehicle using jumper cables and another vehicle or a portable jump starter
- If successful, let the engine run for at least 15-20 minutes to recharge the battery
- Consider having the battery tested or replaced if it’s old or frequently loses charge
Another common issue is the Full Accessory Power Active message appearing unexpectedly or the vehicle getting stuck in this mode. This can be caused by:
- Software glitches in the vehicle’s electrical system
- Faulty ignition switch or start/stop button
- Issues with the battery or alternator
To address these problems:
- Try a system reset by disconnecting the negative terminal of the battery for about 15 minutes, then reconnecting it
- Check for any pending software updates for your vehicle’s infotainment or electrical systems
- Have a professional diagnose potential issues with the ignition switch, battery, or alternator
If you frequently experience problems with the Full Accessory Power Active mode, it’s advisable to have your vehicle inspected by a certified Ford technician. They can perform a comprehensive diagnostic check to identify any underlying issues with the electrical system or components related to this feature.
Best Practices for Using Full Accessory Power Active Mode
To make the most of the Full Accessory Power Active feature while avoiding potential issues, it’s important to follow some best practices:
- Limit usage time: Try to keep the duration of Full Accessory Power Active mode to a minimum, especially if you plan to start your vehicle soon after. Extended use can drain the battery.
- Monitor battery health: Regularly check your vehicle’s battery condition, especially if you frequently use the accessory mode. Consider using a battery tender for vehicles that sit idle for long periods.
- Be aware of power consumption: Some accessories, like the climate control system, can draw significant power. Use these features judiciously when in accessory mode.
- Keep the engine running for high-power needs: If you need to use power-hungry features for an extended time, consider running the engine to prevent battery drain.
- Pay attention to warnings: Most Ford vehicles will provide warnings when the battery charge is getting low. Heed these warnings to avoid a dead battery.
- Regular maintenance: Ensure your vehicle undergoes regular maintenance checks, including battery and alternator tests, to catch potential issues early.
- Familiarize yourself with your vehicle: Read your owner’s manual to understand the specific features and limitations of the Full Accessory Power Active mode in your Ford model.
By following these guidelines, you can enjoy the convenience of the Full Accessory Power Active feature while minimizing the risk of battery-related issues or other electrical problems.
FAQs About Full Accessory Power Active
- What does “Full Accessory Power Active” mean on my Ford?
It indicates that electrical systems are powered without the engine running, allowing use of accessories like radio and windows. - How long can I use Full Accessory Power Active without draining the battery?
It varies, but generally 15-30 minutes is safe. Extended use can drain the battery, potentially causing starting issues. - Can Full Accessory Power Active mode damage my car?
Normal use won’t cause damage, but frequent, extended use can strain the battery and electrical system over time. - Why won’t my car start after using Full Accessory Power Active?
The battery may be drained. Try jump-starting the vehicle and let it run to recharge the battery. - How do I turn off Full Accessory Power Active mode?
Press the start/stop button again without pressing the brake pedal, or start the engine by pressing the brake and start button.