Automotive Locksmith Ignition System Repair & Replacement Flashcards
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Read the first 7 Automotive Locksmith Ignition System Repair & Replacement flashcards as text
What is the primary purpose of the ignition switch 'Run' position versus the 'Start' position?
Answer: Run maintains power to ignition and fuel systems; Start additionally engages the starter motor
The Run position keeps the ignition, fuel, and electrical systems powered for engine operation, while Start adds power to the starter motor circuit.
On a tilt/telescoping steering column, what additional precaution must a locksmith take before removing the ignition lock cylinder?
Answer: Disconnect the negative battery terminal and allow SRS capacitors to discharge
Tilt columns often have side-impact airbag systems near the column; disconnecting the battery and waiting for SRS capacitors to discharge prevents accidental airbag deployment.
A vehicle's ignition lock cylinder turns but the steering column does not unlock. Which component has most likely failed?
Answer: Steering column lock bolt or rack
The steering column lock bolt or rack is directly actuated by the lock cylinder's cam; if the bolt is broken or jammed, the column will remain locked despite the cylinder turning.
When performing ignition work on a hybrid electric vehicle, which unique hazard must the locksmith address before beginning?
Answer: Isolating or powering down the high-voltage system
Hybrid vehicles carry high-voltage battery packs (100V–600V+) near and throughout the vehicle; the HV system must be properly shut down per OEM procedure before ignition work.
A locksmith discovers the ignition housing (not just the cylinder) is cracked on a customer's vehicle. The correct course of action is to?
Answer: Replace the entire ignition housing assembly
A cracked ignition housing compromises structural integrity and secure retention of the lock cylinder, requiring full housing replacement for a safe and lasting repair.
What does the term 'key-in-ignition' warning chime circuit tell a locksmith about the ignition switch?
Answer: It reveals there is a dedicated key-present switch or pin inside the lock cylinder
Most ignitions include a key-present switch or contact pin that closes when a key is inserted, triggering the warning chime circuit and indicating a separate internal sensing element.
When sourcing a replacement ignition lock cylinder by key code, the locksmith must verify which additional detail to ensure the cylinder will match?
Answer: The cylinder's application (year, make, model) and keyway profile
Key codes alone are not sufficient; the cylinder must match the specific keyway profile and application to physically accept the key and fit the column housing.