Passive and Active Keys

Question 1

Q31: What is the difference between a passive and an active key?

Answer 1

A31: A passive key does not require a battery and is detected by proximity (like a transponder chip), while an active key (like a remote key fob) requires a battery to transmit signals.

Question 2

Q32: What is a passive keyless entry system?

Answer 2

A32: A passive keyless entry system allows the vehicle to automatically unlock when the key is in proximity, without the need to press any buttons.

Question 3

Q33: What is the role of a battery in an active key?

Answer 3

A33: The battery powers the key’s transmitter to send signals to the vehicle’s receiver for functions like locking, unlocking, and remote start.

Question 4

Q34: What happens if the battery in an active key dies?

Answer 4

A34: If the battery dies, the key may lose its remote functions, but it can still operate the vehicle mechanically (if equipped) or via backup methods like inserting it into a designated slot in the vehicle.

Question 5

Q35: Can a passive key be reprogrammed if it stops working?

Answer 5

A35: Yes, a passive key can usually be reprogrammed using a key programmer if it stops working.