Deck 12: Immobilizer Systems

Question 1

What is the purpose and function of an immobilizer system?

A) Only allows the use of the ignition key that is properly matched to the lock cylinder
B) Prevents the vehicle from starting or running if the correct key is not used
C) To prevent entry inside the vehicle
D) Requires that the driver enter a password to start the vehicle

Answer 1

B

Question 2

What does the battery in the key fob power?

A) The remote keyless entry (RKE) transmitter
B) Both the remote keyless entry and the immobilizer circuit
C) The shock sensor
D) The immobilizer circuit

Answer 2

A

Question 3

What can occur if the immobilizer system is not working as designed?

A) The engine cranks but does not start
B) The engine starts but then almost immediately stalls
C) No crank condition (the starter does not operate)
D) Any of the above

Answer 3

D

Question 4

An immobilizer fault may occur if the ________.

A) key is exposed to any kind of magnetic field
B) key gets wet
C) key is dropped onto a hard surface
D) Any of the above

Question 5

How is data transmitted between the key and the steering column (lock cylinder)?

A) Transferred from the key to the BCM using a small transmitter in the key
B) Transmitted from the key to the vehicle using the battery inside the key
C) By inductive coupling
D) By electrical contacts inside the lock cylinder

Question 6

A typical Ford immobilizer system is called ________.

A) Passlock
B) VATS
C) PATS
D) SKIS

Question 7

A typical Chrysler immobilizer system is called ________.

A) Passlock
B) SKIS
C) VATS
D) PATS

Question 8

The security dash lamp comes on for 2 to 5 seconds and goes out. This indicates what condition?

A) A fault has been detected in the wiring near the ignition lock cylinder
B) A fault has been detected in the key transponder
C) The system has entered tamper mode
D) Normal security light operation

Question 9

Immobilizer diagnostic trouble codes are often found under what area?

A) Engine-related "P" codes
B) Body-related "B" codes
C) Chassis related "C" codes
D) Either B or C

Question 10

If an immobilizer-related module is replaced, what needs to be performed?

A) The key(s) will need to be replaced to match the new module.
B) The module will need to be programmed with the security information to be able to function with the existing key.
C) All of the immobilizer-related modules need to be replaced at the same time so they will all work together.
D) Any of the above, depending on the make, model, and year of vehicle.

Question 11

Tamper mode is when what occurs?

A) The engine will start and run as normal except that the security warning light on the dash will be on all the time.
B) The security lamp flashes about once per second if the system detects a bad key, lock cylinder, or security-related wiring problem. The engine will not start or if it does start, will not continue to run.
C) The security dash lamp comes on for 2 to 5 seconds for a bulb check when the ignition is turned on, then goes out.
D) Any of the above, depending on the make, model, and year of the vehicle.

Question 12

If an immobilizer-related fault occurs, what symbol is likely to be displayed on the dash?

A) "IM"
B) The "check engine" light
C) A padlock symbol
D) The "service engine soon" light

Question 13

The key or key fob contains a(n) ________ that transmits the security code.

A) code button
B) switch
C) transponder
D) AM transmitter

Question 14

To view immobilizer codes a ________ must be used.

A) generic scan tool
B) factory scan tool
C) factory test light
D) Any of these, depending on the vehicle

Question 15

The vehicle security transceiver antenna may be located ________.

A) under the passenger seat
B) on the rear window defogger grid
C) in the console
D) at the key lock cylinder

Question 16

A shock sensor is part of the vehicle ________ system.

A) speed sensor
B) fuel injection
C) content theft protection
D) immobilizer

Question 17

The vehicle immobilizer systems works by disabling the vehicle ________ system in case of a theft attempt.

A) parking brake
B) fuel or ignition
C) ignition lock
D) shifter

Question 18

To prevent an unauthorized scanning of the vehicle security ID number, the code ________ with each use of the system.

A) changes
B) is reversed
C) is erased
D) is incremented by 1

Question 19

What will happen if a fault occurs in the immobilizer system when the engine is running?

A) The security light will come on and the engine will shut off
B) The engine will run at reduced power
C) The security light will come on but the engine will not be shut off
D) None of these

Question 20

Some Ford security system keys can be programmed using ________.

A) one original key
B) a lock programmer
C) two programmed keys
D) a door lock key

Question 21

A General Motors Passkey III system has the transponder located in the ________.

A) cylinder coil
B) head of the key
C) lock magnets
D) key fob

Question 22

The immobilizer module communicates with the PCM using ________.

A) a serial data line
B) FM radio waves
C) a battery sender
D) the key fob

Question 23

Diagnosing an immobilizer requires the use of ________ and accurate service information.

A) a locksmith
B) jumper wires
C) a key code writing device
D) a scan tool