Question 1

A freeze-frame is a ________ of all data at the instant an emission-related DTC is set.

Accepted Answer

A)  comprehensive component monitor 
B)  snapshot 
C)  failure record 
D)  trip 
A)  comprehensive component monitor 
B)  snapshot 
C)  failure record 
D)  trip B

Question 2

On-board diagnostic (OBD) systems I and II are being discussed. Technician A says that OBD II systems require misfire detection. Technician B says that OBD I was capable of detecting exhaust emission control system failures. Who is right?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B A

Question 3

The MIL is turned off under any of the following conditions, EXCEPT ________.

Accepted Answer

A)  vehicle is driven on 3 consecutive trips with a warm-up cycle, without detecting a fault 
B)  power to the PCM is disconnected 
C)  PCM diagnostic link is grounded 
D)  codes are cleared with a scan tool 
A)  vehicle is driven on 3 consecutive trips with a warm-up cycle, without detecting a fault 
B)  power to the PCM is disconnected 
C)  PCM diagnostic link is grounded 
D)  codes are cleared with a scan tool C

Question 4

Technician A says that when the MIL is on, the technician should retrieve the DTC and follow the manufacturer's recommended procedure to find the root cause of the problem. Technician B says that all OBD II monitors must have the enable criteria achieved before a test is performed. Who is right?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Question 5

freeze-frame data includes all of the following EXCEPT ________.

Accepted Answer

A)  coolant temperature 
B)  vehicle speed 
C)  date of the failure 
D)  RPM 
A)  coolant temperature 
B)  vehicle speed 
C)  date of the failure 
D)  RPM

Question 6

Technician A says that OBD-II includes generic as well as vehicle manufacturer's specific DTCs and data displays. Technician B says that OBD-II have common DTCs. Who is right?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Question 7

Which of these is checked during an OBD II PCM initiated functionality test?

Accepted Answer

A)  ECT 
B)  IAC 
C)  O2 sensor 
D)  Brake switch 
A)  ECT 
B)  IAC 
C)  O2 sensor 
D)  Brake switch

Question 8

The OBD II task manager is responsible for ________.

Accepted Answer

A)  controlling the timing of diagnostic tests 
B)  measuring the coolant temperature 
C)  calculating spark timing 
D)  calculating fuel injector timing 
A)  controlling the timing of diagnostic tests 
B)  measuring the coolant temperature 
C)  calculating spark timing 
D)  calculating fuel injector timing

Question 9

Which organization(s) developed guidelines for OBD II?

Accepted Answer

A)  EPA and CARB 
B)  CARB 
C)  DOT and EPA 
D)  EPA 
A)  EPA and CARB 
B)  CARB 
C)  DOT and EPA 
D)  EPA

Question 10

A vehicle has a flashing MIL when warmed up and driving. What does this mean?

Accepted Answer

A)  Fuel pressure too low 
B)  Low tailpipe flow 
C)  Possible catalytic converter damage 
D)  OBD II self-test complete 
A)  Fuel pressure too low 
B)  Low tailpipe flow 
C)  Possible catalytic converter damage 
D)  OBD II self-test complete

Question 11

A U type DTC indicates a problem with ________.

Accepted Answer

A)  body and accessories 
B)  powertrain 
C)  communication related systems 
D)  suspension system 
A)  body and accessories 
B)  powertrain 
C)  communication related systems 
D)  suspension system

Question 12

Enable criteria means ________.

Accepted Answer

A)  the same thing as a trip 
B)  a warm-up cycle 
C)  conditions for a particular test to be performed 
D)  a drive cycle 
A)  the same thing as a trip 
B)  a warm-up cycle 
C)  conditions for a particular test to be performed 
D)  a drive cycle

Question 13

An element of the OBD II diagnostic management system which stores engine data during a DTC set is called ________.

Accepted Answer

A)  vehicle in vehicle out 
B)  memory account 
C)  misfire 
D)  freeze frame 
A)  vehicle in vehicle out 
B)  memory account 
C)  misfire 
D)  freeze frame

Question 14

A type C DTC will light the MIL.

Accepted Answer

A) True 
 B)False

Question 15

Setting a type B DTC will also trigger a freeze frame.

Accepted Answer

A) True 
 B)False

Question 16

Technician A says that a warm up cycle is a trip where the engine reaches at least 160 degrees F. Technician B says that OBD II requires the diagnostic system to monitor all emission-related components and systems. Who is right?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both technicians A and B 
D)  Neither technician A nor B

Question 17

In an OBD II system, when all enabling criteria for a given diagnostic is met, it's considered which of these terms?

Accepted Answer

A)  A tuned engine 
B)  A trip 
C)  A warmed-up engine 
D)  A freeze frame 
A)  A tuned engine 
B)  A trip 
C)  A warmed-up engine 
D)  A freeze frame

Exam 10: Onboard Diagnosis

A freeze-frame is a ________ of all data at the instant an emission-related DTC is set.

On-board diagnostic (OBD) systems I and II are being discussed. Technician A says that OBD II systems require misfire detection. Technician B says that OBD I was capable of detecting exhaust emission control system failures. Who is right?

The MIL is turned off under any of the following conditions, EXCEPT ________.

Technician A says that when the MIL is on, the technician should retrieve the DTC and follow the manufacturer's recommended procedure to find the root cause of the problem. Technician B says that all OBD II monitors must have the enable criteria achieved before a test is performed. Who is right?

freeze-frame data includes all of the following EXCEPT ________.

Technician A says that OBD-II includes generic as well as vehicle manufacturer's specific DTCs and data displays. Technician B says that OBD-II have common DTCs. Who is right?

Which of these is checked during an OBD II PCM initiated functionality test?

The OBD II task manager is responsible for ________.

Which organization(s) developed guidelines for OBD II?

A vehicle has a flashing MIL when warmed up and driving. What does this mean?

A U type DTC indicates a problem with ________.

Enable criteria means ________.

An element of the OBD II diagnostic management system which stores engine data during a DTC set is called ________.

A type C DTC will light the MIL.

Setting a type B DTC will also trigger a freeze frame.

Technician A says that a warm up cycle is a trip where the engine reaches at least 160 degrees F. Technician B says that OBD II requires the diagnostic system to monitor all emission-related components and systems. Who is right?

In an OBD II system, when all enabling criteria for a given diagnostic is met, it's considered which of these terms?

The Diagnostic Process

Gasoline, Alternative Fuels, and Diesel Fuels

Circuit Testers and Digital Meters

Oscilloscopes and Dsos

Engine Systems

In-Vehicle Engine Service

Valve Train and Variable Valve Timing Diagnosis

Engine and Misfire Diagnosis

Can and Network Communications

Global Obd Ii and Mode 06

Immobilizer Systems

Starting and Charging System Diagnosis

Ignition System Operation and Diagnosis

Temperature Sensors

Throttle Position Tp Sensors

Map and Maf Sensors

Electronic Throttle Control Systems

Oxygen Sensors

Fuel Trim Diagnosis

Fuel Pumps, Lines, and Filters

Fuel-Injection Components and Operation

Gasoline Direct-Injection Systems

Fuel-Injection System Diagnosis and Service

Electronic Transmission Controls

Vehicle Emissions Standards and Testing

Emission Control Devices Operation and Diagnosis

Module Reprogramming

Symptom-Based Diagnosis

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