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Auto Service Test Review
For the Most Effective Personal Review, Match the Following Questions to the OnLine Study Guide Multimedia
Auto Service Test Review
Test #5 84 Questions
Covering Chapters: 20 & 21, 22 & 23, 27, 43 & 44
For the Most Effective Personal Review, Match the Following Questions to the OnLine Study Guide Multimedia
Chapter 20 Info to Know 1. Gasoline is a hydrocarbon fuel HC 2. Octane rating is ability to resist detonation 3. High Octane with high compression ratios
Chapter 20 Info to Know 5. Stoichiometric Air:Fuel Ratio 14.7:1 6. Lean is more air than stoichiometric
Rich is less air than stoichiometric
Best CAT Efficiency
Chapter 20 Info to Know 7 & 8. Detonation & Preignition 9. Dieseling or Runon (caused by a dripping injector)
Chapter 21 Info to Know
12. Fuel Tank Construction 13. Fuel Tank Caps Not Vented to Atmosphere 14. Pickup Sending Unit
Chapter 21 Info to Know
15. Fuel Rail 16. Fuel Filters 17 & 18. Fuel Pumps
Chapter 21 Info to Know
20. Inertia Fuel Shutoff Switch 22. Importance of the Air Filter!!
Chapter 21 Info to Know
3. Catalytic Converter purpose & location 6. Muffler purpose & location
Chapter 27 Info to Know
Platinum & Palladium
Rhodium
8. Normally & Artificially Aspirated Engines 9. Super Chargers = BeltDriven 10. Turbo Chargers = ExhaustDriven
Chapter 27 Info to Know
9 & 10. Both increase Volumetric Efficiency 13. Intercooler, turbines & compressors 14. Waste Gate & Bypass Valve Purpose 18. Turbo Lag
Chapter 27 Info to Know
Intercooler
1. Electronic Fuel Injection 2. Advantages of EFI & Computer Controls 3. Pressure Differences Cause Flow 48. TBI vs. MFI, Direct vs. Indirect, GDI
Chapter 22 & 23 Info to Know
MPG Driveability
Low Emissions
9. Fuel Pressure Regulator 10. A Fuel Injector is a really a Solenoid
Chapter 22 & 23 Info to Know
12. Sensors!! & how they input data to PCM 13. Actuators & how they follow PCM commands
Chapter 22 & 23 Info to Know
14. Exhaust Gas Oxygen Sensor operation
Chapter 22 & 23 Info to Know
Lean Exhaust = Lots of 0 2 Rich Fuel Trim Command
Rich Exhaust = Not Much 0 2 Lean Fuel Trim Command
Chapter 22 & 23 Info to Know
Closed Loop Warm to Hot Coolant (>140°) Running More Than 2 Minutes Active & Responsive Upstream HO2S
Open Loop Cold Coolant (<140°) Running Less Than 2 Minutes Inactive Upstream HO2S
MPG Driveability
Low Emissions
15. Open Loop Operational Mode 16. Closed Loop Operational Mode
1722. Major Sensors & what they sense
Chapter 22 & 23 Info to Know
A/F Wide Range Air/Fuel Sensor = Resistant Titanium O2 BPP/BOO Brake Pedal Position or Brake OnOff BARO Barometric Pressure ECT Engine Coolant Temperature CKP Crankshaft Position CMP Camshaft Position EVP EGR Valve Position IAT Intake Air Temperature KS Knock Sensor MAP Manifold Absolute Pressure (Vacuum for Load Indicator) MAF Mass Air Flow NDS NeutralDrive Switch (Also Park/Neutral Switch or PRNDL) HO 2 S Heated Oxygen Sensor PS Power Steering Pressure Switch TPS Throttle Position Sensor VSS Vehicle Speed Sensor
24. Injector Pulse Width is “ontime” (milliSeconds) 30. OBD (abbreviation & concept) (I & II) 31. DTC = Diagnostic Trouble Codes 32. Malfunction Indicator Light
Chapter 22 & 23 Info to Know
OnBoard Diagnostic
33. Scan Tool & its use 34. Fuel Trim is mixture adjustment 35. Oxygen Sensors have heaters 36. Noid Light to check injector pulse from PCM 37. Injectors may need cleaning
Flooded Engine & Clear Flood Mode Sensor Failure & Limpin Mode Adaptive Strategy for Engine Management
Chapter 22 & 23 Info to Know
1. Reasons for Emission Control Systems 2. Who & What is the EPA 3. Smog
Chapter 43 & 44 Info to Know
4 & 5. Hydrocarbon Pollution makeup/cause 6. Carbon Monoxide pollution makeup/cause 7. Oxides of Nitrogen pollution makeup/cause 8. Particulate Pollution = soot & carbon 9. Where does automotive pollution come from?
Chapter 43 & 44 Info to Know
HC: No Burn
CO: Burn with Insufficient O 2
HC: Evaporation
NOx: Burn too hot
1015. Major Emission Control Systems
CAT Catalytic Converter (HC, CO, NOx) AIR Air Injection System (HC & CO) PCV Positive Crankcase Ventilation (HC & CO)
TAC Thermostatic Air Cleaner (HC & CO) EVAP Evaporative System (HC only) EGR Exhaust Gas Recirculation (NOx only)
Chapter 43 & 44 Info to Know
16. PCV Valve
Chapter 43 & 44 Info to Know
16. Evaporative Charcoal Canister
Chapter 43 & 44 Info to Know
17. Exhaust Gas Recirculation
Chapter 43 & 44 Info to Know
24. What is a Catalyst? 25. Catalytic Converter Operation 26. Platinum & Palladium oxidize HC & CO 27. Rhodium reduces NOx
Chapter 43 & 44 Info to Know
31. Downstream HO2S is a Catalyst Monitor
Chapter 43 & 44 Info to Know
A/F Control
Catalyst Monitor
28. PCM 29. EGOS or HO2S 30. Zirconium is in an Oxygen Sensor
Chapter 43 & 44 Info to Know
32. Misfire = No Burn…Results in HC pollution 33 & 34. Exhaust Gas Analyzers & 5 Gases 35 & 36. IM/240 & VECI
Chapter 43 & 44 Info to Know
Know the EEC System • Engine at the center • PCM & Others on the C.A.N. • Input Sensors Named & Data Stream • Output Controls Named & Data Stream • MIL as an output from the PCM • DLC as a tap into the PCM for scanners
Know the EEC System
Auto Service Test #5
Parts & Tools
These are:
PCM’s MP3 Players Ignition Coils Catalytic Converters
These are:
PCV Valves Oxygen Sensors EGR Valves Catalytic Converters
These are:
Inertia Fuel Shutoff Switches Head Light Switches MultiFunction Switches Oil Pressure Switches
These are:
Cookie Canisters EGR Valves Fuel Pumps EVAP Charcoal Canisters
These are:
EGR Valves Purge Solenoids PCV Valves Fuel Injectors
These are:
Oil Pumps Fuel Pumps Waste Gates Turbochargers
These are:
Oil Filters Air Filters Cabin Air Filters Fuel Filters
These are:
Oil Filters Air Filters Fuel Injectors Turbochargers
These are:
Purge Valves Oxygen Sensors Fuel Injectors PCV Valves
These are:
Hybrid Engines Super & Turbo Chargers Fuel Rails Fuel Tank Sending Units
More than you want to know…
EEC, Fuel Injection, and Emission Parts & Tools
PCM Charcoal Canister Oxygen Sensor Oxygen Sensor DLC Fuel Injector Scan Tool Fuel Tank Cap Catalytic Converter Gas Cap Pressure Tester Fuel Filter Mass Air Flow Sensor Fuel Pump Air Filter Inertia Fuel Shutoff Switch Fuel Tank Sending Unit EGR Valve Intake Manifold PCV Valve Exhaust Manifold
PCM ECM
Powertrain Control Module
PROM Chips..integrated circuits
Programmable Read Only Memory Chips… permanent, unlike the RAM RAM temporarily stores DTC’s
Diagnostic Link Connectors (DLC) OBD I & OBD II
Throttle Position Sensors
Potentiometers…3 connections
Manifold Air Temperature or Intake Air Temperature Sensors
Negative Temperature Coefficient Thermistors Temperature up = Resistance down
Manifold Absolute Pressure Sensors
3wire, voltage reference sensors
At KOEO MAP = Barometric
Idle Air Control Motors…IAC
ChryslerDodgeJeep
General Motors
Ford
Heated Exhaust Gas Oxygen Sensors
S1 = upstream “before the CAT” A/F adjustment
S2 = downstream “after the CAT” Catalyst efficiency
Crankshaft & Camshaft Position Sensors
RPM Signal
Engine Coolant Temperature Sensors
Vehicle Speed Sensors
DPFE…Delta Pressure Feedback EGR Position Transducers
Some engines use MAP variation to signal EGR obedience
Inertia Fuel Shutoff Switch
Mass Air Flow Sensors
Hot Wire Hot Film
“Counts” the amount of air going in to the engine
CKP & CMP
Crank RPM Signal For Spark
Cam RPM Signal For Fuel Injection
Thermal Vacuum Valves…sensitive to coolant temperature & used to switch vacuum on and off to devices like advance units & EGR valves
Vacuum Solenoids
Canister Purge & EGR Regulators
Emission Control Actuators
Idle Speed Control Motors…NOT Idle Air Control Motors
Often called throttle kickers since they could step up the
idle speed by actually opening the throttle as needed when
more accessories were turned on
Vacuum Solenoids…EVAP Purge & EGR Regulator,
Emission Control Actuators
Fuel Tank Sending Unit
Relays
Air Pump
Air Injection Manifold
Air Check Valve
Secondary Air System Air Injection System
Secondary Air Diverter Valves…also called Air Management Valves
Inoperative “gulp valves” can cause backfire on deceleration
Evaporative Charcoal Canisters
Used to reduce HC
Round fiberglass filter goes here
PCV Filter
Evaporative Canister with vapor management valves & fuel tank pressure sensor
Canister Purge Valve & Canister Vent Valve
Purge to engine during closed loop Vent so you can fill the fuel tank
Evaporative Service Port Valve Covers… lefthanded shrader valve inside
Positive Crankcase Ventilation Valves…PCV
Moves “blowby” gasses from the crankcase into the incoming A/F stream
Exhaust Gas Recirculation Valves…EGR
System used to reduce NOx
EGR Valve Variations
Thermostatic Air Cleaner Vacuum Motor & Heat Tube
Early Fuel Evaporation Heaters…used mostly on Carburetor & TBI
EGR Vacuum Regulator Solenoids
Allows the PCM to electronically switch vacuum to a normal EGR valve
4 cylinder “wet” intake manifold for TBI
IAT
EGR Valve
Coolant inlet
Vacuum taps
Brake Booster Hose
V6 wet intake manifold
Tstat goes here
Throttle Body Fuel Injection Units
ISC Motor
Fuel Pressure Regulator
TPS
IAC Motor
TPS
Multiport Fuel Injection Rail with vacuum fuel pressure regulator
Fuel Pressure Regulators
Note: Tiny Filter Screen on Regulator
Throttle Body…NOT Throttle Body Fuel Injection
IAC Motor
TP Sensor
Brake Booster Vacuum Tap
Fuel Pulsation Dampeners
Fuel Pump & Tank Sending Unit
Assembly
Fuel Filter
Fuel Level Wiper… Rheostat
Float for the Fuel Gauge
Fuel Filter Sock
Fuel Pump & Tank Sending Unit Assembly
Float for the Fuel Gauge
Inertia Fuel Shutoff Switches (IFS)
Electric Fuel Pumps & Filters
Mechanical Fuel Pumps
For Carbureted Engines Only
Fuel Filters
Fuel Filter Tether
Fuel Filter Clips
Engine Air Filter
MPFI Rails with Vacuum Pressure Regulators
Central Multiport Fuel Injection
1 Injector
Pressure Regulator
6 Poppet Nozzles
Also Called Unitized Injection
Fuel Injectors
Electric Fuel Pump
Super Charger
ByPass Valve or “Waste Gate” Actuator
SolenoidControlled, VacuumOperated, ByPass Valve Actuator for the Super Charger
Turbocharger Compressor Wheel “Cold Wheel”
Turbocharger Turbine Wheel “Hot Wheel”
Turbo Charger
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