Auto Diagnosis Test #2 Review
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1 Auto Diagnosis Test #2 Review Your own hand written notes may be used for the 1 st 10 minutes of the test For the Most Effective Personal Review, Look Over the On Line Study Guide Multimedia Based on Chapters 15 & 16 and Lab Demonstrations
2 Chapter 15 Information #1 Electron Flow! #2 Induction Moving Magnetism through Coils #4 Amperage = Rate of Electron Flow #5 Direct vs. Alternating Current #7 Voltage = Electromotive Force #8 Resistance = Opposition to Electromotive Force Alpha Omega
3 Chapter 15 Information #11 Complete Circuit has Continuity #12 Consumers are the Load in the Circuit Consumer Source Conductive Path
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8 Chapter 15 Information #13 Voltage Drop & How to Measure It #14 Electrical Power is Wattage
9 Chapter 15 Information #15 Ground Path is Body, Chassis, Engine #16 Ohm s Law
10 Chapter 15 Information #18 Impedance #19 Watt s Law #20 Consumer, Source, Conductive Path
11 Chapter 15 Information #21 Series Circuit Rules & Facts!
12 Chapter 15 Information #21 Series Circuit Rules & Facts!
13 Chapter 15 Information #22 Parallel Circuit Rules & Facts
14 Chapter 15 Information #22 Parallel Circuit Rules & Facts
15 Chapter 15 Information #29 Resistors #31 Stepped or Tapped Resistors Blower Motor #32 Potentiometer TPS or APP #33 Carbon Pile Rheostat
16 Chapter 15 Information #34 Thermistor PTC & NTC #35 Circuit Protection Against Amps Overloads #40 Mercury Switch is Position Sensitive A thermistor is an electronic component that exhibits a large change in resistance with a change in its body temperature. The word thermistor is actually a contraction of the words thermal resistor.
17 Chapter 15 Information #42 Relay Operation & Facts #43 Explain why a Relay is an If:Then switch #44 Same Voltage In as Out
18 Chapter 15 Information 12 Volts in 12 Volts into the Relay Ground Control 12 Volts out of the Relay How can a relay be by passed using a jumper wire?
19 Chapter 15 Information
20 Chapter 15 Information #45 Fused Jumper Wire Use
21 Chapter 15 Information #48 Solenoid Operation & Facts Ground Ground Movable Plunger Movable Plunger Solenoid Coil Solenoid Coil Ground Ground Contacts Open Contacts Closed
22 Chapter 15 Information #49 Conductors #50 Insulators
23 Chapter 15 Information #52 AWG Numbering System (Small # has Big Diameter)
24 Chapter 16 Information #1 Circuit Problems: Opens, Shorts, High Resistances
25 Chapter 16 Information #2 Open = No Continuity & No Flow
26 Chapter 16 Information #2 Short to Ground Blows Fuses
27 Chapter 16 Information #2 Short to Power Turns Circuit On
28 Chapter 16 Information #2 High Resistance Decreases Amps/Current
29 Chapter 16 Information #3 PCM 5 Volt Reference Signal to Sensors #4 Schematic Circuit Drawings #5 Schematic Symbols
30 Chapter 16 Information #6 Use of Jumper Wires for Circuit Testing #7 Checking Voltage Available ( + to ) #11 Use of Fused Jumper Wires
31 Chapter 16 Information #7 Checking Voltage Available ( + to ) #12 Computer Memory Saver #13 DMM 1MΩ to 10MΩ Input Impedance #16 Measure Voltage in Parallel #17 Voltage Drop Testing (+ to +) & ( to ) #18 Measure Amps in Series or Inductively
32 Chapter 16 Information #33 Voltage Drop Testing Live Circuit (+ to +) & ( to ) #34 Thermistors (PTC & NTC) #36 Testing a Relay (ohms, jumping, clicking) #39 The Best Way to Check Wiring is V.D. #45 Connectors & Grounds are Numbered
33 Chapter 16 Information #47 Tracing Circuits with a Highlighter #48 The 3 Big Circuit Problems!! #49 Shorted Coil has Less Ohms than Specs Ω in within spec = OK Ω in less than spec = Short Ω either OL or = Open Ω in more than spec = High Resistance
34 Chapter 16 Information #51 Corrosion causes High Resistance #51 Corrosion Reduces Intensity/Current Flow #55 Soldering with Rosin Core Solder #57 After Soldering, Use Heat Shrink Tubing
35 Bring a Calculator Use Ohm s Law in a Series Circuit Use Watt s Law in a Series Circuit
36 Bring a Calculator Put in your own R x values & practice the series circuit math
37 Series Circuit with a 12 Volt Source R1 = 2 Ohms R2 = 1 Ohms R3 = 1 Ohms R4 = 2 Ohms Total Resistance = Circuit Amperage = Voltage Drop of R1 = Voltage Drop of R2 = Voltage Drop of R3 = Voltage Drop of R4 = Total Circuit Voltage Drop = Voltage Available to R2 = Voltage Available to R3 = Voltage Available to R4 = Circuit Wattage =
38 Series Circuit with a 12 Volt Source R1 =.5 Ohms R2 = 1 Ohms R3 = 1 Ohms R4 =.5 Ohms Total Resistance = Circuit Amperage = Voltage Drop of R1 = Voltage Drop of R2 = Voltage Drop of R3 = Voltage Drop of R4 = Total Circuit Voltage Drop = Voltage Available to R2 = Voltage Available to R3 = Voltage Available to R4 = Circuit Wattage =
39 Series Circuit with a 12 Volt Source R1 = 5 Ohms R2 = 1 Ohms R3 = 1 Ohms R4 = 5 Ohms Total Resistance = Circuit Amperage = Voltage Drop of R1 = Voltage Drop of R2 = Voltage Drop of R3 = Voltage Drop of R4 = Total Circuit Voltage Drop = Voltage Available to R2 = Voltage Available to R3 = Voltage Available to R4 = Circuit Wattage =
40 Series Circuit with a 12 Volt Source R1 = 20 Ohms R2 = 10 Ohms R3 = 10 Ohms R4 = 20 Ohms Total Resistance = Circuit Amperage = Voltage Drop of R1 = Voltage Drop of R2 = Voltage Drop of R3 = Voltage Drop of R4 = Total Circuit Voltage Drop = Voltage Available to R2 = Voltage Available to R3 = Voltage Available to R4 = Circuit Wattage =
41 Electrical Parts & Testing Tools
42 Digital Multimeters
43 Computer Memory Saver
44 Scan Tools
45 Inductive Amps Clamp
46 12 Volt Test Light
47 Relays Use a small amount amperage flow in a coil to pull contacts shut & switch a larger amount of amps
48 Diagnostic Link Connectors
49 Fuses
50 Stepped or Tapped Resistors
51 Fused Jumper Wires
52 Solenoids Use a small amount amperage flow in a coil to pull a plunger & switch a larger amount of amps
53 12 Volt Test Light
54 Circuit Breakers
55 Computer Memory Saver
56 Volts Amps Ohms
57 Then: Amperage Increase If: Charging Voltage Increase 12 Volts 6 Ω = 2 Amps 14.2 Volts 6 Ω = 2.36 Amps Volts Amps Ohms
58 Watts Amps Volts
59 Volt Drop R Amps Ohms R
60 Just the Facts Test Preparation
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67 a 85 30
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72 W = A x V A = W V V = W A
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