TROUBLESHOOTING USING DIAGNOSTIC TROUBLE CODES

FLASH CODE RETRIEVAL ON OBD-I GENERAL MOTORS VEHICLES

PUT A WIRE IN THE ATTIC AND A LIGHT IN THE BASEMENT!

FLASH CODE RETRIEVAL ON CHRYSLER VEHICLES

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Diagnosis and troubleshooting of automotive electrical

1. 2. OBJECTIVES

After studying Chapter 38, the reader will be able to:
1. Prepare for ASE computerized engine controls
diagnosis (A8) certification test content area “E.”
2. List the steps of the diagnostic process.
3. Describe the simple preliminary tests that should
be performed at the start of the diagnostic process.
4. List six items to check as part of a thorough visual
inspection.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

3. OBJECTIVES

5. Explain the troubleshooting procedures to follow if
a diagnostic trouble code has been set.
6. Explain the troubleshooting procedures to follow if
no diagnostic trouble code has been set.
7. Discuss the type of scan tools that are used to
assess vehicle components.
8. Describe the methods that can be used to
reprogram (reflash) a vehicle computer.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

4. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

• It is important that all automotive service
technicians know how to diagnose and troubleshoot
engine computer systems.
• The diagnostic process is a strategy that eliminates
known-good components or systems in order to find
the root cause of automotive engine performance
problems.
– All vehicle manufacturers recommend a diagnostic
procedure, and the plan suggested in this chapter
combines most of the features of these plans plus
additional steps developed over years of real-world
problem solving.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

5. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

• Verify the Problem (Concern)
• Perform a Thorough Visual Inspection and Basic Tests
–
–
–
–
–
–
–
–
–
–
Check for obvious problems (basics, basics, basics).
Check everything that does and does not work.
Look for evidence of previous repairs.
Check oil level and condition.
Check coolant level and condition.
Use the paper test
Ensure adequate fuel level.
Check the battery voltage.
Check the spark using a spark tester.
Check the fuel pump pressure
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

6. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

Retrieve the Diagnostic Trouble Codes (DTCs)
Check for Technical Service Bulletins (TSBs)
Look Carefully at Scan Tool Data
Narrow the Problem to a System or Cylinder
Repair the Problem and Determine the Root
Cause
• Verify the Repair and Clear Any Stored DTCs
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

7. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-1 A funnel is one way to visualize
the diagnostic process. The purpose is to narrow
the possible causes of a concern until the root
cause is determined and corrected.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
FIGURE 38-2 Step #1 is to verify the
customer concern or problem. If the problem
cannot be verified, then the repair cannot be
verified.
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

8. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-3 A form that the
customer should fill out if there is a
driveablilty concern to help the
service technician more quickly find
the root cause.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

9. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-4 This is what was found when removing an air filter from a vehicle
that had a lack-of-power concern. Obviously the nuts were deposited by squirrels
or some other animal, blocking a lot of the airflow into the engine.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

10. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-5 Using a bright light makes seeing where the smoke is coming from
easier. In this case, smoke was added to the intake manifold with the inlet blocked
with a yellow plastic cap and smoke was seen escaping past a gasket at the idle
air control.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

11. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-6 A spark tester
connected to a spark plug wire or
coil output. A typical spark tester will
only fire if at least 25,000 volts is
available from the coil, making a
spark tester a very useful tool. Do
not use one that just lights when a
spark is present, because they do
not require more than about 2,000
volts to light.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

12. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-7 Step #3 in the
diagnostic process is to
retrieve any stored
diagnostic trouble codes.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

13. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-8 After checking for
stored diagnostic trouble codes
(DTCs), the wise technician
checks service information for any
technical service bulletins that may
relate to the vehicle being
serviced.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

14. THE EIGHT-STEP DIAGNOSTIC PROCEDURE

FIGURE 38-9 Looking carefully at the scan tool
data is very helpful in locating the source of a
problem.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
FIGURE 38-10 Step #8 is very important. Be
sure that the customer’s concern has been
corrected.
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

15. SCAN TOOLS

• Scan tools are the workhorse for any diagnostic
work on all vehicles.
• Scan tools can be divided into two basic groups:
– Factory scan tools.
– Aftermarket scan tools
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

16. SCAN TOOLS

FIGURE 38-11 A TECH 2 scan tool is the
factory scan tool used on General Motors
vehicles.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
FIGURE 38-12 Some scan tools use
pocket PCs which make it very convenient
to use.
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

17. RETRIEVAL OF DIAGNOSTIC INFORMATION

• To retrieve diagnostic information from the PCM,
use the following steps:
– Locate and gain access to the data link connector (DLC).
– Connect the scan tool to the DLC and establish
communication.
– Follow the on-screen instructions of the scan tool to
correctly identify the vehicle.
– Observe the scan data, as well as any diagnostic trouble
codes.
– Follow vehicle manufacturer’s instructions if any DTCs
are stored. If no DTCs are stored, compare all sensor
values with a factory acceptable range chart to see if any
sensor values are out-of-range.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

18. TROUBLESHOOTING USING DIAGNOSTIC TROUBLE CODES

• Pinning down causes of the actual problem can be
accomplished by trying to set the opposite code.
– For example, if a code indicates an open throttle position
(TP) sensor (high resistance), clear the code and create a
shorted (low-resistance) condition.
• This can be accomplished by using a jumper wire
and connecting the signal terminal to the 5-volt
reference terminal.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

19. TROUBLESHOOTING USING DIAGNOSTIC TROUBLE CODES

• Methods for Clearing Diagnostic Trouble Codes
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

20. FLASH CODE RETRIEVAL ON OBD-I GENERAL MOTORS VEHICLES

• The GM system uses a “check engine” or “check
engine soon” MIL to notify the driver of possible
system failure. Under the dash (on most GM
vehicles) is a data link connector (DLC) previously
called an assembly line communications link (ALCL)
or assembly line diagnostic link (ALDL).
– Most General Motors diagnostic trouble codes can be
retrieved by using a metal tool and contacting terminals A
and B of the 12-pin DLC
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

21. FLASH CODE RETRIEVAL ON OBD-I GENERAL MOTORS VEHICLES

FIGURE 38-13 To retrieve flash codes from an OBD-I General Motors
vehicle, connect terminals A and B with the ignition on–engine off. The M
terminal is used to retrieve data from the sensors to a scan tool.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

22. RETRIEVING FORD DIAGNOSTIC CODES

• The best tool to use during troubleshooting of a
Ford vehicle is a self-test automatic readout
(STAR) tester, new generation STAR (NGS), WDS
(Worldwide Diagnostic System), or another scan
tool with Ford capabilities.
– If a STAR tester or scan tool is not available, a needle
(analog) type of voltmeter can be used for all OBD-I (prior
to 1996) systems.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

23. RETRIEVING FORD DIAGNOSTIC CODES

FIGURE 38-14 A Ford OBD-I
self-test connector. The location
of this connector can vary with
model and year of vehicle.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

24. RETRIEVING FORD DIAGNOSTIC CODES

• Key On–Engine Off Test (On-Demand Codes or
Hard Faults)
– Separator Pulse
• Continuous Memory Codes (Soft Codes)
• Key On–Engine Running (KOER) Test
• Steering,Brake, and Overdrive Switch Test
– Dynamic Response Check
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

25. PUT A WIRE IN THE ATTIC AND A LIGHT IN THE BASEMENT!

FIGURE 38-15 To retrieve Ford DTCs using a test light and a jumper wire, turn the
ignition switch on (engine off) and make the connections shown. The test light will
blink out the diagnostic trouble codes.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

26. FLASH CODE RETRIEVAL ON CHRYSLER VEHICLES

• To put the computer into the self-diagnostic mode,
the ignition switch must be turned on and off twice
within a 5-second period (on-off-on-off-on).
• The computer will flash a series of fault codes.
• Older Chrysler brand products flash the “check
engine” lamp on the dash.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

27. OBD-II DIAGNOSIS

• Starting with the 1996 model year, all vehicles sold
in the United States must use the same type of 16pin data link connector (DLC) and must monitor
emission-related components.
• Retrieving OBD-II Codes
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

28. OBD-II DIAGNOSIS

FIGURE 38-16 A typical OBD-II data link connector (DLC). The location varies with
make and model and may even be covered, but a tool is not needed to gain
access. Check service information for the exact location if needed.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

29. OBD-II ACTIVE TESTS

• OBD-II Drive Cycle
• Types of OBD-II Codes
– Type A Codes.
– Type B Codes.
– Type C and D Codes.
• OBD-II Freeze-Frame
• Diagnosing Intermittent Malfunctions
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

30. SERVICE/FLASH PROGRAMMING

• Remote Programming
• Direct Programming
• Off-Board Programming
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

31. SERVICE/FLASH PROGRAMMING

FIGURE 38-17 The first step in the reprogramming procedure is to determine the
current software installed using a scan tool. Not all scan tools can be used. In
most cases using the factory scan tool is needed for reprogramming unless the
scan tool is equipped to handle reprogramming.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

32. SERVICE/FLASH PROGRAMMING

FIGURE 38-18 Follow the on-screen instructions.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

33. SERVICE/FLASH PROGRAMMING

FIGURE 38-19 An Internet connection is usually needed to perform updates
although some vehicle manufacturers use CDs which are updated regularly at
a cost to the shop.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

34. SERVICE/FLASH PROGRAMMING

FIGURE 38-20 Connecting cables and a computer to perform
offboard programming.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

35. J2534 REPROGRAMMING

• Legislation has mandated that vehicle
manufacturers meet the SAE J2534 standards for
all emissions-related systems on all new vehicles
starting with model year 2004.
• This standard enables independent service repair
operators to program or reprogram emissionsrelated ECMs from a wide variety of vehicle
manufacturers with a single tool.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

36. J2534 REPROGRAMMING

FIGURE 38-21 The J2534
pass-through reprogramming
system does not need a scan
tool to reflash the PCM on
most 2004 and newer
vehicles.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

37. J2534 REPROGRAMMING

FIGURE 38-22 A typical J2534 universal reprogrammer that
uses the J2534 standards.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

38. MANUFACTURER’S DIAGNOSTIC ROUTINES

• Each vehicle manufacturer has established their own
diagnostic routines and they should be followed. Most
include the following steps:
– Retrieve diagnostic trouble codes.
– Check for all technical service bulletins that could be related to the
stored DTC.
– If there are multiple DTCs, the diagnostic routine may include
checking different components or systems instead of when only one
DTC was stored.
– Perform system checks.
– Perform a road test matching the parameters recorded in the freezeframe to check that the repair has corrected the malfunction.
– Repeat the road test to cause the MIL to be extinguished.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

39. COMPLETING SYSTEM REPAIRS

• After the repair has been successfully completed,
the vehicle should be driven under similar
conditions that caused the original concern.
• Verify that the problem has been corrected.
• To perform this test drive, it is helpful to have a copy
of the freezeframe parameters that were present
when the DTC was set.
• By driving under similar conditions, the PCM may
perform a test of the system and automatically
extinguish the MIL.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

40. PROCEDURES FOR RESETTING THE PCM

• The PCM can be reset or cleared of previously set
DTCs and freeze-frame data in the following ways:
– Driving the Vehicle.
– Clear DTCs Using a Scan Tool.
– Battery Disconnect.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

41. ROAD TEST (DRIVE TRACE)

• Use the freeze-frame data and test-drive the vehicle
so that the vehicle is driven to match the conditions
displayed on the freezeframe.
• If the battery has been disconnected, then the
vehicle may have to be driven under conditions that
allow the PCM to conduct monitor tests
– Universal Drive Cycle
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

42. EUROPEAN BOSCH DIAGNOSIS

• Diagnosing a European brand vehicle, such as a
Volkswagen, Audi, Mercedes, or BMW, can be a challenge.
• One of the challenges is that global (generic) scan tools,
while capable of supplying the specified data, do not allow
access to many diagnostic trouble codes that might be set
and stored.
• Using factory-level scan tools, such as VAG-COM, launch
X431, or Baum iscan, results in some terms that are not
familiar such as:
– Address word.
– Function
– Display group
• Using Function 04
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

43. SUMMARY

1. Funnel diagnostics—Visual approach to a diagnostic procedure:
–
–
–
–
–
–
–
–
Verify the problem (concern)
Perform a thorough visual inspection and basic tests
Retrieve the diagnostic trouble codes (DTCs)
Check for technical service bulletins (TSBs)
Look carefully at scan tool data
Narrow the problem to a system or cylinder
Repair the problem and determine the root cause
Verify the repair and check for any stored DTCs
2. Care should be taken to not induce high voltage or current around any
computer or computer-controlled circuit or sensor.
3. A thorough visual inspection is important during the diagnosis and
troubleshooting of any engine performance problem or electrical
malfunction.
4. If the MIL is on, retrieve the DTC and follow the manufacturer’s
recommended procedure to find the root cause of the problem.
5. OBD-II vehicles use a 16-pin DLC and common DTCs.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

44. REVIEW QUESTIONS

1. Explain the procedure to follow when diagnosing a vehicle
without any stored DTCs using a scan tool.
2. Discuss what the PCM does during a drive cycle to test
emission-related components.
3. Explain the difference between a type A and type B OBD-II
diagnostic trouble code.
4. List three things that should be checked as part of a
thorough visual inspection.
5. List the eight-step funnel diagnostic procedure.
6. Explain why a bulletin search should be performed after
stored DTCs are retrieved.
7. List the three methods that can be used to reprogram a
PCM.
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

45. CHAPTER QUIZ

1. Technician A says that the first step in the
diagnostic process is to verify the problem
(concern). Technician B says the second step is to
perform a thorough visual inspection. Which
technician is correct?
a)
b)
c)
d)
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

46. CHAPTER QUIZ

47. CHAPTER QUIZ

2. Which item is not important to know before starting
the diagnosis of an engine performance problem?
a)
b)
c)
d)
List of previous repairs
The brand of engine oil used
The type of gasoline used
The temperature of the engine when the problem occurs
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

48. CHAPTER QUIZ

49. CHAPTER QUIZ

3. A paper test can be used to check for a possible
problem with _____.
a)
b)
c)
d)
The ignition system (bad spark plug wire)
A faulty injector on a multiport engine
A burned valve
All of the above
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

50. CHAPTER QUIZ

51. CHAPTER QUIZ

4. Which step should be performed last when
diagnosing an engine performance problem?
a)
b)
c)
d)
Checking for any stored diagnostic trouble codes
Checking for any technical service bulletins (TSBs)
Performing a thorough visual inspection
Verify the repair
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

52. CHAPTER QUIZ

53. CHAPTER QUIZ

5. Technician A says that if the opposite DTC can be
set, the problem is the component itself.
Technician B says if the opposite DTC cannot be
set, the problem is with the wiring or grounds.
Which technician is correct?
a)
b)
c)
d)
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

54. CHAPTER QUIZ

55. CHAPTER QUIZ

6. The preferred method to clear diagnostic trouble
codes (DTCs) is to _____.
a)
b)
c)
d)
Disconnect the negative battery cable for 10 seconds
Use a scan tool
Remove the computer (PCM) power feed fuse
Cycle the ignition key on and off 40 times
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

56. CHAPTER QUIZ

57. CHAPTER QUIZ

7. Which is the factory scan tool for Chrysler brand
vehicles equipped with CAN?
a)
b)
c)
d)
Star Scan
Tech 2
NGS
Master Tech
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

58. CHAPTER QUIZ

59. CHAPTER QUIZ

8. Technician A says that reprogramming a PCM
using the J2534 system requires a factory scan
tool. Technician B says that reprogramming a PCM
using the J2534 system required Internet access.
Which technician is correct?
a)
b)
c)
d)
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

60. CHAPTER QUIZ

61. CHAPTER QUIZ

9. Technician A says that knowing if there are any
stored diagnostic trouble codes (DTCs) may be
helpful when checking for related technical service
bulletins (TSBs). Technician B says that only a
factory scan tool should be used to retrieve DTCs.
Which technician is correct?
a)
b)
c)
d)
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

62. CHAPTER QUIZ

63. CHAPTER QUIZ

10. Which method can be used to reprogram a PCM?
a)
b)
c)
d)
Remote
Direct
Off-board
All of the above
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

64. CHAPTER QUIZ

65.

END
Diagnosis and Troubleshooting of Automotive Electrical,
Electronic, and Computer Systems, Fifth Edition
By James D. Halderman
© 2010 Pearson Higher Education, Inc.
Pearson Prentice Hall - Upper Saddle River, NJ 07458

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