Ignition System Servicing Flashcards
7 cards from real CAL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ignition System Servicing flashcards as text
A 2018 Honda Civic requires a new ignition key. The locksmith identifies it as needing a Honda 'G' chip transponder. What does specifying the correct chip type ensure?
Answer: The correct frequency and protocol are used for immobilizer communication
Different transponder chip types operate on different frequencies and protocols; using the wrong chip type means the immobilizer ECU will never recognize the key regardless of programming attempts.
When using a code machine to originate an ignition key by code, the locksmith inputs the key code and the machine produces a key. What is the key code derived from?
Answer: Manufacturer bitting code databases cross-referenced to the vehicle's key code tag or record
Key codes are stored in manufacturer databases indexed by key code numbers found on dealer records, code tags, or code books, and they translate directly into the bitting sequence to be cut.
Which of the following best describes 'impressioning' an ignition lock?
Answer: Inserting a blank key, applying tension, and reading marks left by binding tumblers to cut the key
Impressioning involves inserting a key blank, applying rotational tension, and marking or reading the marks the binding wafers/pins leave on the blank to determine the correct bitting.
What type of key cut is produced by a laser or milling key cutting machine that cuts into the side of the key blade rather than the edge?
Answer: Laser cut (internal/milled cut)
Laser-cut (also called milled or internal cut) keys have cuts routed into the flat sides of the blade, allowing the key to be inserted in either direction and providing higher security.
A locksmith needs to replace an ignition cylinder retaining clip or roll pin. Which tool is most appropriate for this task?
Answer: Pin punch and small hammer
Roll pins and retaining clips securing ignition cylinders are driven in or out using a correctly sized pin punch struck with a small hammer to avoid damaging surrounding components.
When a locksmith encounters an ignition with a 'VATS' (Vehicle Anti-Theft System) key on an older GM vehicle, what unique feature must the replacement key have?
Answer: A resistor pellet in the key blade with a specific resistance value
GM's VATS system reads the electrical resistance of a resistor embedded in the key blade; the vehicle's BCM only allows starting if the resistance matches one of 15 possible values.
After rekeying an ignition cylinder, the locksmith should always perform which verification step before returning the vehicle?
Answer: Test the key in the cylinder through all ignition positions (ACC, ON, START) to confirm smooth operation
Cycling the key through all switch positions verifies that the cylinder rotates correctly, detent positions engage properly, and the electrical switch activates at each stage.