Accessory mode is a power state that lets you run electrical systems in the Honda City without starting the engine. It lets you use the radio, lights, and other electronics for a short period while the 12-volt battery supplies the power.
What is Accessory Mode?
In the Honda City, Accessory mode (often called ACC) is a limited power state of the ignition or push-button system. It turns on essential electrical circuits without engaging the starter motor or the engine. This mode is handy for listening to music, using navigation, or operating certain conveniences when you don’t want to run the engine.
How to activate Accessory Mode
Activation steps depend on whether your City uses a traditional ignition key or a modern push-button start. The instructions below reflect common configurations, but always refer to your owner’s manual for your exact model year and trim.
With a traditional ignition key
Turn the key from LOCK to ACC to power the accessories. To run more systems (like the instrument cluster and HVAC controls) without starting the engine, you can move the key to ON. To start the engine, turn to START.
With a push-button start
With the brake pedal not pressed, press the Start/Stop button once to enter Accessory mode (ACC). Pressing the button again while holding the brake starts the engine. Pressing the button once more when the engine is running will turn the engine off but leave some electronics powered if you’re in the required mode.
What can run in Accessory Mode?
The following items are typically powered in Accessory mode, though exact availability can vary by trim and year. Use this state for short periods to avoid battery drain.
- Radio, infotainment system, Bluetooth, USB connections, and navigation (if equipped)
- Interior and dash illumination, courtesy lights, and instrument cluster backlighting
- Power windows and, in some trims, manually operated mirrors
- Dashboard clock and trip computer information
In many Honda City configurations, the air conditioning and heating system may have limited or no cooling/heating capability in pure Accessory mode to protect the battery. If the system requires significant power, it may shut off until you move to ON or start the engine.
Differences between ACC, ON, and START
Understanding the distinct states helps prevent misunderstanding about what the car can do without the engine running.
Key distinctions
- Accessory (ACC): Powers most electronics (radio, lights, some controls) while the engine remains off. The engine is not started.
- On (IG or RUN): All electrical systems are active and ready for operation; the engine may be running or ready to start. In push-button cars, this state often corresponds to the point after ACC when you press the brake and start.
- Start: Activates the engine by cranking and then running. This state engages the propulsion system and full vehicle systems.
Safety and battery considerations
Use Accessory mode sparingly. Prolonged use can drain the 12V battery, potentially leaving you unable to start the engine. If you expect to need electronics for an extended period, consider starting the engine occasionally or turning off unnecessary systems to conserve power.
Summary
Accessory mode in the Honda City provides a temporary power state that enables essential electronics without starting the engine. It is activated via the ignition switch or push-button start, depending on the model year, and is useful for listening to audio, using navigation, or operating certain controls while parked. Be mindful of battery use and trim-specific differences, and consult the owner’s manual for precise instructions for your vehicle.