How to Set Up Auto-Locking for the Fit?

[StRyan]

The method to set up auto-locking for the Fit is: The Fit does not have an auto-locking function, only manual locking. If you want to use this feature, you need to install a device that plugs into the OBD interface. Taking the 2020 Fit as an example, it belongs to the subcompact car category, with body dimensions of: length 4109mm, width 1694mm, height 1537mm, a wheelbase of 2530mm, a fuel tank capacity of 40L, and a curb weight of 1088kg. The 2020 Fit features a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with a 1.5L naturally aspirated engine, delivering a maximum horsepower of 131PS, a maximum power of 96kW, and a maximum torque of 155Nm, paired with a continuously variable transmission.

[ElainaLee]

When I was using the 2018 Fit, I also researched the auto-lock feature. For older models, you needed an OBD module to add this function, but newer models can set it directly on the dashboard. First, start the car, then press and hold the central lock button on the driver's side for about ten seconds until you hear a beep, which means the auto-lock is activated. For some model years, it only works when shifting to D gear and exceeding 20km/h. If there's no response, it's likely that the model doesn't support it, and you'll need to visit a 4S shop to update the system or install a small module. Be careful not to let children play with the window buttons—I've seen cases where the window lock wasn't engaged, leading to accidental presses. Before setting it up, I recommend checking the owner's manual, as the setup methods can vary significantly between different production batches.

[DiJames]

Just helped my cousin set up the auto-lock feature on his 2022 Fit last week. Nowadays, some new models don’t require external devices. After starting the car (but before driving), access the settings menu, find the vehicle safety options, and look for the speed-sensing auto-lock switch—just turn it on and save. By default, doors lock automatically when speed exceeds 15 km/h, but you can adjust this threshold. Older models require an OBD interface module, which costs just a few dozen bucks and plugs into the port under the steering wheel. A key point: When enabling auto-lock, it’s best to also activate the auto-unlock-in-reverse feature. Otherwise, doors remain locked during parking/reversing, which can be risky—once, while backing into a spot, I accidentally trapped myself because I hadn’t noticed the locked doors.

[DelJuliette]

After driving a Fit for five years, I found that most cars don't come with auto-lock from the factory, and aftermarket installation is quite common. I recommend an OBD plug-and-play module, which can be purchased for around 60 RMB on Taobao. Turn the key to the second position without starting the engine, plug the module into the OBD port under the steering wheel, then start the car, shift to D gear, and test the effect. Note that some products come with an emergency brake unlock feature, which can be life-saving in sudden situations—make sure to clarify the functions when purchasing. I've seen cases where people bought used cars only to find the previous owner had installed one but didn't disable it, causing locking logic confusion. It's best to reset the system before setting it up.

[CadenMarie]

The auto-lock feature for the Fit depends on the model year. My neighbor's 2019 model had it activated through the dealership's computer. After starting the car, hold the door lock button for more than 6 seconds until the dashboard flashes twice, indicating success. This enables automatic locking when the speed exceeds 20km/h. For older models, it's safer to install an external module rather than forcibly updating the system. After setup, test the emergency unlock function—for example, pulling the inner handle twice while driving should open the door, as this safety design must remain intact. Also, a reminder: during the rainy season, it's best to check the auto-lock function monthly. I once experienced a door lock motor failure due to moisture, which was quite alarming when it suddenly malfunctioned on a rainy day.

[VonEmilia]

Organized three methods for Fit's auto-locking: The most convenient is to purchase an OBD plug-and-play module, which automatically locks when shifting to D gear and exceeding 10km/h. The second option is to enter the central control settings and check the 'Auto-lock while driving' option under Vehicle-Door Locks. Older models require activation at a 4S shop using a diagnostic tool. Special emphasis on child lock linkage: After enabling auto-lock, it's recommended to simultaneously activate the rear door child locks, with the physical knob located on the door frame side. Once, while driving my relative's child, I forgot to engage the child lock, and the kid managed to open the door handle—fortunately, we were at low speed. Safety features must be used in combination to be reliable.