See also:

Ending a Call
Press to end a call. ...

Battery
The battery supplies power to start the engine and operate any additional electrical accessories. • To avoid break-down or failure to start the vehicle, maintain a battery with full cranking power. ...

Remote Keyless Entry (RKE) System Operation
The Remote Keyless Entry (RKE) transmitter will work up to 60m (195 ft) away from the vehicle. There are other conditions which can affect the performance of the transmitter. See Remote Keyless E ...