Locksmith Automotive Locksmithing 2 — Questions and Answers
Question 1: What does TPMS stand for in modern vehicles, and why is it relevant to automotive locksmiths?
- Tire Pressure Monitoring System, which can be disrupted during wheel well access (Correct answer)
- Transponder Programming Management System, the core of key programming
- Transmission Power Management System, relevant when bypassing ignition
- Timed Pulse Modulation Signal, used in remote key fobs
Correct answer: Tire Pressure Monitoring System, which can be disrupted during wheel well access
TPMS (Tire Pressure Monitoring System) uses sensors in wheels that can be affected when locksmiths access wheel wells during certain procedures.
Question 2: When using an automotive decoder tool on a lock cylinder, what is the primary purpose?
- To destroy the lock for emergency entry
- To read the bitting code of the existing key cuts without removing the cylinder (Correct answer)
- To reprogram the immobilizer system
- To duplicate the key fob signal wirelessly
Correct answer: To read the bitting code of the existing key cuts without removing the cylinder
A decoder tool reads the depth and spacing of cuts inside a lock cylinder, allowing the locksmith to cut a working key without the original.
Question 3: Which OBD port protocol is most commonly used by modern US vehicles for key programming communication?
- RS-232
- CAN bus (Controller Area Network) (Correct answer)
- Bluetooth Low Energy (BLE)
- IEEE 802.11 Wi-Fi
Correct answer: CAN bus (Controller Area Network)
CAN bus is the dominant communication protocol in modern vehicles and is accessed through the OBD-II port for key programming and diagnostics.
Question 4: A customer's car uses a proximity key system and the vehicle won't start. What is the FIRST thing a locksmith should check?
- Replace the ignition switch immediately
- Check if the key fob battery is dead (Correct answer)
- Reprogram the transponder chip
- Perform an EEPROM dump of the BCM
Correct answer: Check if the key fob battery is dead
A dead key fob battery is the most common and simplest cause of a proximity key failure and should always be checked first before invasive procedures.
Question 5: What is the function of the Body Control Module (BCM) in relation to automotive lock systems?
- It physically actuates the door lock solenoids only
- It manages door locks, windows, lights, and communicates with the immobilizer system (Correct answer)
- It stores the mechanical key bitting codes
- It controls only the remote keyless entry frequency
Correct answer: It manages door locks, windows, lights, and communicates with the immobilizer system
The BCM controls a wide range of body functions including door locks and communicates with the immobilizer/PATS system to authorize vehicle start.
Question 6: When a locksmith needs to make an automotive key by code, what does the term 'key code' refer to?
- The VIN number of the vehicle
- An alphanumeric code assigned by the manufacturer that corresponds to specific key cut depths (Correct answer)
- The frequency code of the remote fob
- The PIN code needed to program a new transponder
Correct answer: An alphanumeric code assigned by the manufacturer that corresponds to specific key cut depths
A key code is a manufacturer-assigned alphanumeric designation that directly translates to the specific bitting (cut depths and positions) for a particular key.
Question 7: What is 'key cloning' in the context of automotive transponder keys?
- Physically copying the metal key blank by tracing
- Duplicating the transponder chip's data to a new chip so it works identically to the original (Correct answer)
- Creating a new key by programming it through the OBD port
- Replacing the entire ignition cylinder with a new one
Correct answer: Duplicating the transponder chip's data to a new chip so it works identically to the original
Key cloning copies the unique cryptographic data from one transponder chip onto a compatible blank chip, creating a functional duplicate without communicating with the vehicle's ECU.
Locksmith Automotive Locksmithing 2
What does TPMS stand for in modern vehicles, and why is it relevant to automotive locksmiths?