CAL High-Security Automotive Keys 2

Question 1

What is the primary purpose of a transponder chip embedded in a high-security automotive key?

Accepted Answer

To communicate an immobilizer code to the ECU

Answer

The transponder chip transmits a unique rolling or fixed code to the vehicle's ECU, which must match before the engine is allowed to start.

Question 2

Which cloning method is used when a transponder key cannot be duplicated by standard EEPROM reading because the original chip is crypto-locked?

Accepted Answer

Emulation via an aftermarket blank with editable memory

Answer

When crypto-locked chips cannot be read directly, a compatible emulator blank is programmed to mimic the original transponder's ID and response.

Question 3

A 2018 Ford F-150 uses a PATS 4 system. Which tool operation is typically required to add a new key when only one working key is available?

Accepted Answer

Using an IDS/FJDS interface or compatible J2534 device to perform a security access routine

Answer

PATS 4 requires a dealer-level or compatible scan tool with security access to the PCM to add additional keys when fewer than two programmed keys are present.

Question 4

What does 'rolling code' mean in the context of automotive remote key fobs?

Accepted Answer

Each button press transmits a new cryptographic code from a synchronized sequence

Answer

Rolling code (KeeLoq) systems generate a new encrypted code with every button press, preventing replay attacks by making captured signals useless.

Question 5

When cutting a high-security laser-cut (sidewinder) key, what is the critical difference from cutting a standard double-sided key?

Accepted Answer

Laser-cut keys use depth cuts on the key blade face rather than the edge

Answer

Sidewinder/laser-cut keys have a winding groove cut into the flat face of the blade, requiring a specialized track-cut or laser-cut duplicator machine.

(CAL) Certified Automotive Locksmith Practice Test

(CAL) Certified Automotive Locksmith Practice Test

CAL High-Security Automotive Keys 2