CAL Automotive Locksmithing Tools 3 — Questions and Answers
Question 1: Which device do automotive locksmiths use to read and write EEPROM data from a vehicle's immobilizer control unit?
- Oscilloscope
- EEPROM programmer/reader (Correct answer)
- Lock pick gun
- Transponder tester
Correct answer: EEPROM programmer/reader
An EEPROM programmer (such as the Orange5 or similar) is used to physically read data from and write data to the EEPROM chip in an immobilizer control unit, enabling key programming when OBD methods fail.
Question 2: A transponder key tester is used to verify:
- The mechanical cut depth of the key blade
- Whether a transponder chip inside a key is functioning and transmitting the correct signal (Correct answer)
- The radio frequency of a remote keyless entry fob
- The voltage output of the vehicle's ignition coil
Correct answer: Whether a transponder chip inside a key is functioning and transmitting the correct signal
A transponder tester checks that the chip inside the key is active, reads the chip type, and confirms it is transmitting an appropriate signal before programming begins.
Question 3: What is the primary difference between an OBD-II key programmer and a standalone key programmer?
- OBD-II programmers work only on foreign vehicles
- OBD-II programmers connect via the vehicle's diagnostic port, while standalone units may work without a working key or OBD access (Correct answer)
- Standalone programmers are only used for remote fobs
- OBD-II programmers require dismantling the dashboard
Correct answer: OBD-II programmers connect via the vehicle's diagnostic port, while standalone units may work without a working key or OBD access
OBD-II programmers connect through the diagnostic port and often require at least one working key, while standalone programmers can work via direct ECU connection or other bypass methods when no working key exists.
Question 4: A 'token' in the context of key programming tools (e.g., Autel, Advanced Diagnostics) refers to:
- A physical USB dongle for software activation
- A unit of credit consumed when programming a key on supported vehicles (Correct answer)
- A temporary transponder chip used for testing
- A code printed on the vehicle's door jamb sticker
Correct answer: A unit of credit consumed when programming a key on supported vehicles
Tokens are credits within key programming software platforms that are consumed each time a locksmith programs a key on a supported vehicle, representing the cost of accessing manufacturer-level programming data.
Question 5: Which tool is commonly used to clone a fixed-code (non-rolling-code) transponder key without programming access to the vehicle?
- TPMS sensor tool
- Transponder cloner (e.g., CN900 or similar) (Correct answer)
- Immobilizer bypass module
- OBD2 scanner
Correct answer: Transponder cloner (e.g., CN900 or similar)
A transponder cloner reads the data from a working transponder key and writes an exact copy to a compatible blank chip, allowing duplication of fixed-code transponders without vehicle access.
Question 6: In automotive locksmithing, a 'T-Code' or 'chip type' designation (e.g., Texas Crypto, Megamos 48) is used to:
- Indicate the key blade profile for cutting
- Identify the specific transponder chip family used in a vehicle's immobilizer system (Correct answer)
- Define the depth-and-space specification for a key
- Label the vehicle's OBD2 protocol (CAN, K-Line, etc.)
Correct answer: Identify the specific transponder chip family used in a vehicle's immobilizer system
T-Codes or chip type designations identify the specific transponder technology used in a vehicle's immobilizer, which determines which programming method, clone chip, or tool is compatible.
Question 7: When using an immobilizer emulator or bypass module, what is the device doing?
- Replacing the ignition cylinder with a pushbutton start
- Simulating the correct transponder signal to the vehicle's immobilizer so the engine will start without the original key (Correct answer)
- Reprogramming the ECU to disable the immobilizer permanently
- Cutting a new key blade to match the ignition
Correct answer: Simulating the correct transponder signal to the vehicle's immobilizer so the engine will start without the original key
An immobilizer emulator stores the transponder data and continuously sends the correct authentication signal to the vehicle's immobilizer module, allowing the vehicle to start even when the original transponder key is not present.
CAL Automotive Locksmithing Tools 3
Which device do automotive locksmiths use to read and write EEPROM data from a vehicle's immobilizer control unit?