MECP

What does the black band on a resistor stand for?

0

What does the brown band on a resistor stand for?

1

What is MOST 150

150 M baud and 3072 bits Enables an ethernet channel in addition to the control message channel, streaming data channel and packet data channel.

What does the red band on a resistor stand for?

2

What does the orange band on a resistor stand for?

3

What does the yellow band on a resistor stand for?

4

If a circuit design requires a threshold voltage of 5.1v and a 5.1v Zener diode is used with 10% tolerance, what is the range

4.845v low 5.355v high

What is the rating of the ST TDA3540 MOSFET?

4x30 watts into 4 ohms at 10% distortion on 1Khz

What does the green band on a resistor stand for?

5

What does the blue band on a resistor stand for?

6

What is a widely used op amp IC for inverter or comparator duties

741

What is a XNOR gate

A combination XOR gate followed by an inverter. Its output is true if the inputs are the same and false if the inputs are different.

What is a bit?

A digital signal representing a number.

What is a Zener Diode and what is its function?

A special kind of diode based on the initial work of Dr. Carl Zener in 1934. It functions as a voltage regulator when reverse biased.

What are the seven basic logic gates

AND OR XOR NOT NAND NOR XNOR

When using a Zener diode, where should a fuse be placed for circuit protection?

After the Zener diode

A type of horn that uses compressed air instead of an electric diaphragm or voice coil to produce sound. These horns are usually driven by an electric air pump that receives its trigger from host security system.

Air Horns

What is an OR gate?

Any one of the inputs can be TRUE to make the output TRUE

What does a 4 in the third digit of the OBD II DTC breakdown mean?

Aux Emission Control System

What are the three terminals on a bi polar transistor?

Base, collector and emitter

What is Pin 16 of the OBD II

Battery Power

What varies current to control overall current flow?

Bi Polar transistors

What does B stand for in an OBD II diagnostic code?

Body

What is a BCM?

Body Control Module

Define the XOR gate

Both inputs can not be TRUE for a TRUE output. If they are the output is FALSE.

What is Pin 6 of the OBD II

Can High (J-2284)

What is Pin 14 of the OBD II

Can Low (J-2284)

What is MOST 50?

Carried over UTP or unshielded twisted pa contains one pair of twisted wires for input and a second pair for output. The pairs have a different teist rate. Max speed is 50 M baud and 1024 bits.

What does C stand for in an OBD II diagnostic code?

Chassis

What is Pin 4 of the OBD II

Chassis Ground

What does a 6 in the third digit of the OBD II DTC breakdown mean?

Computer Output Circuits

What is the Conventional Current Flow Theory?

Current flows from positive to negative.

Ib

Current into the base

Ic

Current into the collector

Ie

Current out of the emitter

What is DLC?

Data Link Connector

What is synchronous?

Data signals that are constant, meaning the signal never astops as long as the computers are active.

What does DTC stand for?

Diagnostic Trouble Code

What is ePhy?

Electrical Physical Layer

What is an ECU?

Electronic Control Module

What is an ECM?

Engine Control Module

What varies voltage to control current flow?

Field effect transistor

What does a 2 in the third digit of the OBD II DTC breakdown mean?

Fuel and Air Injector Malfunctions

What does a 1 in the third digit of the OBD II DTC breakdown mean?

Fuel and Air Metering

What is Pin 15 of the OBD II

ISO 9141-2L Line or KWP

What is Pin 7 of the OBD II

ISO9141-2 K Line of KWP

What do the last 2 digits in the OBD II DTC represent?

Identify the exact section of the system that is causing the trouble codes.

What is a NAND gate

If both inputs are TRUE then the output is FALSE and if both inputs are FALSE then the output is TRUE

What does a 3 in the third digit of the OBD II DTC breakdown mean?

Ignition System Misfire

What is needed to work around a Hybrid vehicles Orange covered wiring?

Insulated Class 0 electrical linemans gloves

What is Pin 10 of the OBD II

J1850 Bus (PWM only)

What is Pin 2 of the OBD II

J1850 Bus+ (VPW and PWM)

What is a JFET?

Junction Field Effect Transistor

What is found on Pin 1 of the OBD II

LSDT CAN High

What is found on Pin 9 of the OBD II

LSFT CAN Low

What is an AND gate

Looks for two or more inputs to be TRUE in a Logic circuit. IF both inputs are TRUE then the output will be TRUE. If both inputs are FALSE then the output will be FALSE.

What is Pin 3 in the OBD II

MS Can High

What is Pin 11 of the OBD II

MS Can Low

What does MIL stand for?

Malfunction Indicator Light

What does MOST stand for?

Media Oriented Systems Transport

What is a MOSFET and what are its parts?

Metal Oxide Semiconductor Field Effect Transistor 1 Gate 2 Source 3 Drain

Are electrons positively or negatively charged?

Negatively

What does U stand for in an OBD II diagnostic code?

Network

What is oPhy?

Optical Physical Layer

What is Watts law?

P=IxE

What are the different layers of MOST

Physical layer Data link layer Network layer Transport layer Session layer Presentation layer Application layer

What is POF?

Plastic Fiber Optic

What does P stand for in an OBD II diagnostic code?

Powertrain

What is a PCM?

Powertrain Control Module

What is a logic gate

Produce a specific output state based on the condition of one or more inputs.

How do you determine the in and out of the MOST network

Remove the most plug from the device while the vehicle is asleep and shine a flashlight into the housing. The device will reapond from the output side with a res beam of light.

What is OBD II and what does it do?

Second generation On Board Diagnostics created in 1996 to provide technicisns eith a universal set of basic fiagnodtic capabilities.

What is Pin 5 of the OBD II

Signal Ground

What is the Electron Flow Theory?

Since current is based on the movement of electrons, it flows from negative to positive.

What is SAE1979 and ISO15031-5

Specifies a set of standard messages that can be used by scan tools to obtain OBD II data from a vehicle.

What are the names of the start and stop codes with he asynchronous signal

Start of frame SOF End of frame EOF

What does the power supply of a mobile amplifier do?

Switches battery voltage to a higher rail voltage

What does the bias on the base of a transistor control.

The amount of current flowing between the emitter and collector.

What is V Zener?

The avalanche point

Describe MOST 25

The device will have constant power, chassis ground, and usually a wake up diagnostic wire. Typical colors are orange or green. Max speed of 25M baud and 512 bits

What is Zener voltage?

The diode's voltage threshold. Also known as avalanche voltage.

What determines the polarity of the current to trigger a transistor

The middle letter

What is hole flow?

The opposite direction of electron flow.

What is a NOT gate

The output is opposite of the input. If the input is TRUE then the output is FALSE.

What is baud rate?

The speed at which bits are transmitted.

What is multiplexing?

The very basis of a network using control modules in modern vehicles is multi tasking electrical signals over a common conductor path.

What do arbitration bits do?

They allow the more important message to win if 2 or more messages are transmitted to the same receiving device at the same time.

Where does the arrow point in a bi polar transistor?

Toward the N type material

What does the letter Q on a schematic represent?

Transistor

What are the two most common forms of logic gate arrays implemented into integrated circuits

Transistor transistor logic TTL Complentary Metal Oxide Semiconductor CMOS

What does a 7 in the third digit of the OBD II DTC breakdown mean?

Transmission

What does a 8 in the third digit of the OBD II DTC breakdown mean?

Transmission

What is UTP?

Unshielded Twisted Pair

Vbe

Voltage drop from the base to the emitter

What is Vcb

Voltage drop from the collector to the base

What is Vce

Voltage drop from the collector to the emitter

What is Vceo

Voltage drop from the collector to the emitter with an open base (Max circuit voltage)

What is a positively charged ion?

When an atom has a missing electron in its outer shell

What is a negatively charged ion?

When the atom has an added electron in its outer shell.

Hfe

gain of the transistor Ic/Ib=Hfe