Accessory Boards (small boards) Flashcards
What EST is used to read flash codes?
dash diagnostic lights
The appropriate EST for performing a resistance test on a potentiometer-type TPS isolated from its circuit is what?
DMM
What is the correct means of electronically coupling a HH-EST with a truck chassis ECM?
chassis data connector
When resistance and continuity tests are made on electronic circuit components, the circuit being tested should be:
a. energized b. open c. closed
open
DMM test lead resistance should never exceed:
a. 100 ohms b. 10 ohms per inch c. 1.0 ohm a. 0.2 ohm
1.0 ohm
What is the output (signal) of a pulse generator rotational speed sensor measured in?
V-AC
Which of following cannot usually be performed by a generic HH-EST?
a. proprietary data programming b. snapshot testing c. customer data programming d. erase historic fault codes
proprietary data programming
Which of the following procedures cannot be performed using a PC and the OEM software?
a. solenoid cycle tests b. permanently erase active fault codes c. customer data programming d. erase historic fault codes
permanently erase active fault codes
Which of the following methods is commonly used to upgrade the software on handheld ESTs?
a. replace the RAM chip b. reprogram the software cartridge from a mainframe b. upgrade the cartridge PROM chips or cards d. Replace the docking head
upgrade the cartridge PROM chips or cards
Which FMI should be displayed when reading an open TPS circuit?
5
How many counts of resolution can be displayed by a 41/2-digit DMM?
19,999
The specification that indicates how fine a measurement can be made by a DMM is known as what?
resolution
When a DMM is set to read AC, which is the term used to describe the averaging of potential difference to produce a meter reading?
root mean square (rms)
Which port on an HH-EST data connector is used to connect the printer?
RS-232 port
What components are inserted into terminal sockets to enable testing by KMM probes and minimize physical damage?
terminal dummies
Which electrical voltage value does a DMM output when in diode test mode?
0.6V
Technician A states that the accuracy of an analog meter is usually no better than 3 percent. Technician B states that most DMMs have an accuracy factor that is within 0.1 percent of the reading. Who is correct?
a. neither A nor B b. both A and B c. Technician A only Technician B only
Both A and B
What is the component called that can be safely inserted into electronic circuits so that they can be tested without interrupting them?
breakout box
Technician A states that using the snapshot test mode when using a handheld reader/programmer to troubleshoot an intermittently occurring fault code will help identify the conditions that produced the code. Technician B states that snapshot test mode can only analyze a historic code. Who is correct?
a. neither A nor B b. Both A and B c. Technician B only d. Technician A only
Technician A only
When verifying the signal produced by a potentiometer-type TPS, the DMM test mode selected should be, what?
V-AC
Describe the difference between an active code and a historic code
An ACTIVE code exists at the time of viewing: A HISTORIC code is INACTIVE at the time of viewing and is logged in memory
What is meant by the term GUI? Give some examples.
A GUI is a graphical user interface: its best example is in the pictorial ICONs used in Widows, and Mac software.
What is meant by the term networking?
The term NETWORKING is used generally to refer to two or more computer systems that can communicate with each other. On a truck, the data bus or backbone is the networking medium. The Internet is one means that enable PCs to network.
Which of the following PC components would be usually described as a peripheral?
a. system housing b. hard disk drive c. CPU d. Printer
Printer
In a PC is to be networked to the Internet or an OEM data Hub, which of the following devices is usually required?
a. a CD drive b. a digital camera c. speakers d. a modem
a modem
Which of the following J1587 identifiers is equivalent to a J1939 suspect parameter number (SPN)?
a. SA b. FMI c. PID a MID
PID
Technician A says that a J1939 SA is a module with an address on the data bus. Technician B says that J1587 FMIs are identical in number to J1939 FMIs. Who is correct?
Technician A only
Which of the following is the J1939 equivalent of the J1587 MID?
a. SPN b. SA c. FMI d. PGN
SA
What color is the 2013 J1939 data connector?
Green
Technician A says that the post-2013 J1939 data connector is backward compatible with pre-2013 data connectors. Technician B says the F-pin on a post-2013 J1939 data connector is smaller than that on a pre-2013 data connector. Who is correct?
a. Technician A only b. Technician B only c. Both A and B d. neither A nor B
Both a and B
