Chapter 24 & 25 Computer Systems

1.    Technician A says that both OBD I and OBD II systems will pinpoint a sensor that is operating poorly or incorrectly. Technician B says that OBD I will only indicate that a circuit is no longer operating properly. Who is right?

• A only

• B Only

• Both A & B

• Neither A or B

An OBD II system will identify problems with all the components listed except        .

•      battery temperature sensor

• ignition coil

• oxygen

  sensor

• starter solenoid

A period of vehicle operation during which the computer system adapts to new components and progra1nming information is called the

• relearn procedure

• break-in period

• teaching sequence

• recalibration procedure

A properly operating magnetic sensor should generate _____

• 1.5 - 3 volts dc

• 3 - 5 volts ac

• 1.5 - 3 volts ac

• 3 - 5 volts dc

The use of heat, cold, or moisture to simulate extreme operating conditions of components is called________

• component isolation

• environmental testing

• system checking

• stress testing

1.      Technician A says that wearing an anti-static wrist strap is an effective means of preventing damage when working on computer circuits. Technician B says that disconnecting the vehicle's battery is sufficient. Who is right?

• A Only

• B Only

• Both A & B

• Neither A or B

   An oxygen sensor tested faulty and must be replaced. Technician A says to use a sealant that is safe for oxygen sensors on the threads. Technician B says to use a sensor socket to prevent sensor damage. Who is right?

• A Only

• B Only

• Both A & B

• Neither A or B

          A trouble code is triggered in an automotive computer system. Technician A says fuel-contaminated engine oil could possibly trigger this trouble code. Technician B says fuel-contaminated engine oil has no effect on computer system operation. Who is right?

• A Only

• B Only

• Both A & B

• Neither A or B

The data link connector for an OBD II system most often will be located     

• behind the front bumper

• under the dash or center console, near the driver's seat

• behind the dash on the passenger's side of the vehicle

• on the firewall, inside the engine compartment

    The number 1 appearing as the first digit in an OBD II trouble code indicates that the trouble code is        .

• manufacturer-designated

• standard (SAE)

• system-specific

• nonuniform