# CarKeyRemoteControlSession The object that manages communication with the vehicles you manufacture. ``` class CarKeyRemoteControlSession ``` ## Overview A `CarKeyRemoteControlSession` object coordinates interactions between your app and your company’s make of vehicles. This object works with the system to transmit data securely to and from a vehicle, and to report results back to your app. Use this object to send commands or data directly to a vehicle, and to get information about the available vehicles and their current configuration. Don’t create this object directly. Instead, call the [`start(delegate:subscriptionRange:with:)`](/documentation/CarKey/CarKeyRemoteControl/start(delegate:subscriptionRange:with:)) method to create a new session object. When you finish interacting with the vehicle, call the session’s [`end()`](/documentation/CarKey/CarKeyRemoteControlSession/end()) method to close out the session and prevent further access. You can have only one active session at a time. If you try to start a second session, [`start(delegate:subscriptionRange:with:)`](/documentation/CarKey/CarKeyRemoteControl/start(delegate:subscriptionRange:with:)) doesn’t return until the currently active session becomes invalid. When you configure a new session, provide a delegate object to receive data from vehicle-initiated transfers. The system also uses your delegate notify you when the configuration of a vehicle changes. For example, it lets you know when connectivity to the vehicle changes. The delegate must adopt the [`CarKeyRemoteControlSessionDelegate`](/documentation/CarKey/CarKeyRemoteControlSessionDelegate) protocol. > Note: If your app has an active session, the system automatically > ends that session when your app enters the background. Upon reentering > the foreground, you must create a new session to communicate with your > vehicle again. ## Topics ### Performing Vehicle-Related Actions [`func perform(RemoteKeylessEntryAction) throws -> RemoteKeylessEntryAction.ExecutionRequest`](/documentation/CarKey/CarKeyRemoteControlSession/perform(_:)-8ac0c) Sends a request to the vehicle to perform a one-time action. [`func perform(RemoteKeylessEntryEnduringAction) throws -> RemoteKeylessEntryEnduringAction.EnduringExecutionRequest`](/documentation/CarKey/CarKeyRemoteControlSession/perform(_:)-7mpsy) Sends a request to the vehicle to start an action that has a separate stopping point. ### Sending Data to the Vehicle [`func sendPassthroughData(Data, toVehicle: String) throws`](/documentation/CarKey/CarKeyRemoteControlSession/sendPassthroughData(_:toVehicle:)) Sends the specified custom data to the vehicle. ### Closing the Session [`func end() throws`](/documentation/CarKey/CarKeyRemoteControlSession/end()) Ends the session and stops the delivery of notifications for all vehicles in the session. ### Getting Vehicle Information [`var vehicleReports: [VehicleReport]`](/documentation/CarKey/CarKeyRemoteControlSession/vehicleReports) The configuration details of the provisioned vehicles that match your company’s make. [`func isPassiveEntryAvailable(forVehicle: String) throws -> Bool`](/documentation/CarKey/CarKeyRemoteControlSession/isPassiveEntryAvailable(forVehicle:)) Returns a Boolean value that indicates whether passive entry is currently available for the specified vehicle. ### Structures [`struct Attestation`](/documentation/CarKey/CarKeyRemoteControlSession/Attestation) Object representing an attestation and related data ### Instance Methods [`func perform(RemoteKeylessEntryConfigurableEnduringAction, continuationStrategy: CarKeyRemoteControlSession.ContinuationStrategy) throws -> RemoteKeylessEntryConfigurableEnduringAction.EnduringExecutionRequest`](/documentation/CarKey/CarKeyRemoteControlSession/perform(_:continuationStrategy:)) Sends a request to the vehicle to start an action that has a separate stopping point, and optionally allows your app to have control over incoming continuation requests and to exchange data during the execution of the action. [`func sign(data: Data, forVehicle: String) throws -> CarKeyRemoteControlSession.Attestation`](/documentation/CarKey/CarKeyRemoteControlSession/sign(data:forVehicle:)) Sign data with the endpoint.SK identified by vehicleIdentifier as described in the section “OEM App Data Attestation” of the Car Connectivity Consortium Digital Key Release 3.0 specification. ### Enumerations [`enum ContinuationStrategy`](/documentation/CarKey/CarKeyRemoteControlSession/ContinuationStrategy) Strategy to use on reception of a continuation request. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)