51S04T0 advanced diesel engine performance diagnosis 2000

diesel engine performance advanced diesel engine performance diagnosis student guide COURSE CODE: 51S04T0 ORDER NUMBER: FCS-13007-REF Ford Customer Service Division Technical Training IMPORTANT SAFETY NOTICE Appropriate service methods and proper repair procedures are essential for the safe, reliable operation of all motor vehicles, as well as the personal safety of the individual doing the work This manual provides general directions for accomplishing service and repair work with tested, effective techniques Following them will help assure reliability There are numerous variations in procedures, techniques, tools and parts for servicing vehicles, as well as in the skill of the individual doing the work This manual cannot possibly anticipate all such variations and provide advice or cautions as to each Accordingly, anyone who departs from instructions provided in this manual must first establish that he compromises neither his personal safety nor the vehicle integrity by his choice of methods, tools or parts As you read through the procedures, you will come across NOTES, CAUTIONS, and WARNINGS Each one is there for a specific purpose NOTES give you added information that will help you to complete a particular procedure CAUTIONS are given to prevent you from making an error that could damage the vehicle WARNINGS remind you to be especially careful in those areas where carelessness can cause personal injury The following list contains some general WARNINGS that you should follow when you work on a vehicle • • Always wear safety glasses for eye protection • • • To prevent serious burns, avoid contact with hot metal parts such as the radiator, exhaust manifold, tail pipe, catalytic converter and muffler Be sure that the ignition switch is always in the OFF position, unless otherwise required by the procedure • • Do not smoke while working on the vehicle Set the parking brake when working on the vehicle If you have an automatic transmission, set it in PARK unless instructed otherwise for a specific service operation If you have a manual transmission it should be in REVERSE (engine OFF) or NEUTRAL (engine ON) unless instructed otherwise for a specific service operation • Keep hands and other objects clear of the radiator fan blades Electric cooling fans can start to operate at any time by an increase in underhood temperatures, even though the ignition is in the OFF position Therefore, care should be taken to ensure that the electric cooling fan is completely disconnected when working under the hood Use safety stands whenever a procedure requires you to be under the vehicle • Operate the engine only in a well-ventilated area to avoid the danger of carbon monoxide • Keep yourself and your clothing away from moving parts when the engine is running, especially the fan and belts To avoid injury, always remove rings, watches, loose hanging jewelry, and loose clothing before beginning to work on a vehicle Tie long hair securely behind your head The recommendations and suggestions contained in this manual are made to assist the dealer in improving his dealership parts and/or service department operations These recommendations and suggestions not supersede or override the provisions of the Warranty and Policy Manual, and in any cases where there may be a conflict, the provisions of the Warranty and Policy Manual shall govern The descriptions, testing procedures, and specifications in this handbook were in effect at the time the handbook was approved for printing Ford Motor Company reserves the right to discontinue models at any time, or change specifications, design, or testing procedures without notice and without incurring obligation Any reference to brand names in this manual is intended merely as an example of the types of tools, lubricants, materials, etc recommended for use Equivalents, if available, may be used The right is reserved to make changes at any time without notice WARNING: MANY BRAKE LININGS CONTAIN ASBESTOS FIBERS WHEN WORKING ON BRAKE COMPONENTS, AVOID BREATHING THE DUST BREATHING THE ASBESTOS DUST CAN CAUSE ASBESTOSIS AND CANCER Breathing asbestos dust is harmful to your health Dust and dirt present on car wheel brake and clutch assemblies may contain asbestos fibers that are hazardous to your health when made airborne by cleaning with compressed air or by dry brushing Wheel brake assemblies and clutch facings should be cleaned using a vacuum cleaner recommended for use with asbestos fibers Dust and dirt should be disposed of in a manner that prevents dust exposure, such as sealed bags The bag must be labeled per OSHA instructions and the trash hauler notified as to the contents of the bag If a vacuum bag suitable for asbestos is not available, cleaning should be done wet If dust generation is still possible, technicians should wear government approved toxic dust purifying respirators OSHA requires areas where asbestos dust generation is possible to be isolated and posted with warning signs Only technicians concerned with performing brake or clutch service should be present in the area Copyright © 2000 Ford Motor Company Produced and Coordinated by Technical Support Operations Ford Customer Service Division February, 2000 CUSTOMER EXPECTATIONS Customer Expectations: Service Make it convenient to have my vehicle serviced at your dealership The Service Advisor should Provide me with a clear and thorough explanation of the service performed Call me within a reasonable amount of demonstrate a genuine concern for my service needs time after my service visit to ensure that I'm completely satisfied Fix it right the first time Complete servicing my vehicle in a Be responsive to questions or concerns I bring to your attention timely and professional manner Expectation “Fix It Right The First Time, on Time.” Both service advisors and technicians are important players when it comes to Expectation #3 Why Customers tell us “Fixing It Right The First Time, on Time” is one of the reasons they would decide to return to a dealer to buy a vehicle and get their vehicles serviced Technician Training It is our goal to help the technician acquire all of the skills and knowledge necessary to “Fix It Right The First Time, on Time.” We refer to this as “competency.” Technician’s Role Acquire the skills and knowledge for competency in your specialty via: STST New Model – Self Study – Self Study – FordStar Broadcasts – FordStar Broadcasts – Ford Multimedia Training (FMT) – Instructor Led – Instructor Led The Benefits The successful implementation of expectations means: – Satisfied customers – Repeat vehicle sales – Repeat service sales – Recognition that Ford and Lincoln/Mercury technicians are “the Best in the Business” TABLE OF CONTENTS INTRODUCTION Diesel Engine Performance Curriculum Intro-1 Advanced Diesel Engine Performance Classroom Course Intro-2 DAY ONE Day One Agenda – Morning Day One-1 Day One Agenda – Afternoon .Day One-1 Prerequisite Review Questions Day One-3 Workstation – Diesel Engine Performance (Table Top) Student’s Answer Sheet .Day One-11 Workstation – Diesel Engine Performance (On-Vehicle) Student’s Answer Sheet .Day One-13 Workstation – Diesel Engine Performance Bench (FMT) Student’s Answer Sheet .Day One-15 Workstation – Diesel Engine Performance (Bench) Student’s Answer Sheet .Day One-17 DAY TWO Day Two Agenda – Morning Day Two-1 Day Two Agenda – Afternoon Day Two-1 Workstation – Diesel Engine Performance (Table Top) Student’s Answer Sheet Day Two-3 Workstation – Diesel Engine Performance (On-Vehicle) Student’s Answer Sheet Day Two-9 Workstation – Diesel Engine Performance Bench (FMT) Student’s Answer Sheet Day Two-11 Workstation – Diesel Engine Performance (Bench) Student’s Answer Sheet Day Two-13 DAY THREE Day Three Agenda – Morning Day Three-1 Day Three Agenda – Afternoon Day Three-1 GLOSSARY Diesel Engine Electronics Terminology Glossary-1 Diesel Engine Electronics Acronym List Glossary-3 Advanced Diesel Engine Performance Diagnosis February, 2000 i TABLE OF CONTENTS NOTES ii February, 2000 Advanced Diesel Engine Performance Diagnosis INTRODUCTION DIESEL ENGINE PERFORMANCE CURRICULUM ENGINE PERFORMANCE CURRICULUM PATH Diesel Engine Operation – SS Diesel Engine Electronics – SS 7.3L DIT Diesel Engine Performance Diagnosis – FMT Advanced Diesel Engine Performance Diagnosis – Classroom Prerequisites Legend = Self Study (SS) = Ford Multimedia Training (FMT) = Instructor Led – Classroom – Basic Electrical Part – SS – Basic Electrical Part – FMT – Basic Electrical Part – Classroom – Electronics Part – SS – Electronics Part – FMT – Electronics Part – Classroom – Networks + Multiplexing Part – SS – Networks + Multiplexing Part – FMT Planned Training Pathway Ford Motor Company has identified the skills and knowledge necessary to meet the curriculum goals in the Advanced Diesel Engine Performance specialty The Planned Training Pathway is a series of courses designed to provide you with these skills and knowledge The chart above illustrates the courses in this curriculum Description The Advanced Diesel Engine Performance Curriculum consists of four courses The self-study courses and FMT courses are self-paced training programs The Classroom course is hands-on and is facilitated by an instructor The information in the self-study, FMT, and Classroom courses are designed to prepare you to successfully complete the instructor led course You are currently in Course Four of the diesel engine curriculum, Advanced Diesel Engine Performance Classroom Advanced Diesel Engine Performance Diagnosis February, 2000 Intro-1 INTRODUCTION ADVANCED DIESEL ENGINE PERFORMANCE CLASSROOM COURSE Course Description This is a three-day, hands-on course The course is designed to provide you with maximum practice and application of diagnostic and repair skills The first day, you will practice these skills on four different workstations The second day, you will continue to practice on four different workstations designed to enhance your ability to correctly diagnose diesel engine concerns Before the end of the course, you will have had eight opportunities to practice your diagnostic and repair skills The results of your work will be recorded on worksheets Worksheets All hands-on activities will be guided by worksheets When you are assigned to a workstation, you will be given 30 to 40 minutes to complete the worksheet Every 30 to 40 minutes, you will move to the next workstation and complete another worksheet You will have five minutes to move from one workstation to another Course Requirements To meet the requirements of this course, you must satisfactorily complete a hands-on test that includes three workstations and a post-test that will both be administered on the third day Course Objectives The purpose and the objectives of this course are to enable you to: l describe the diagnostic process for diesel engine concerns l locate necessary diagnostic material in service publications and reference manuals l use a DVOM to perform diagnostic procedures l use a scan tool to perform self-test routines l diagnose a mechanical fault that could be perceived as electronic l diagnose an in-range failure l diagnose a code-related concern l use a gauge bar for diesel engine diagnosis l perform diagnostic tests and procedures on a diesel engine Intro-2 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY ONE DAY ONE AGENDA – MORNING The agenda for the day is as follows: NOTE: Times may be adjusted to coordinate with Training Center normal operating hours ACTIVITY TIME Start of Class (Course Introduction and Expectations) 8:30 am to 8:45 am (15 min) Refresher/Questions From Previous Courses 8:45 am to 9:30 am (45 min) BREAK 9:30 am to 9:40 am (10 min) Refresher/Questions From Previous Courses (Continued) 9:40 am to 10:45 am (65 min) BREAK 10:45 am to 11:00 am (15 min) Refresher/Questions From Previous Courses (Continued) 11:00 am to 11:45 am (45 min) Preview Workstations 11:45 am to 12:00 pm (30 min) DAY ONE AGENDA – AFTERNOON ACTIVITY TIME LUNCH 12:00 pm to 1:00 pm (60 min) First Workstation Rotation (Workstation 1, 2, 3, 4) 1:00 pm to 1:45 pm (45 min) Second Workstation Rotation (Workstation 1, 2, 3, 4) 1:45 pm to 2:30 pm (45 min) BREAK 2:30 pm to 2:45 pm (15 min) Third Workstation Rotation (Workstation 1, 2, 3, 4) 2:45 pm to 3:30 pm (45 min) Fourth Workstation Rotation (Workstation 1, 2, 3, 4) 3:30 pm to 4:15 pm (45 min) End of Day One Session Advanced Diesel Engine Performance Diagnosis 4:30 pm February, 2000 Day One-1 DAY ONE NOTES Day One-2 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY TWO NOTES Day Two-8 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE (ON-VEHICLE) STUDENT’S ANSWER SHEET NAME: DIRECTIONS: Diagnose a “Cranks Normal / No Start” concern on the classroom vehicle Answer the following questions as you work Can the concern be verified? Yes No What symptom chart should be used to help diagnose this concern? Fill in the blanks: Test Step Test (Detail) Advanced Diesel Engine Performance Diagnosis Result February, 2000 Action to Take Day Two-9 DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE (ON-VEHICLE) STUDENT’S ANSWER SHEET (Continued) Identify the cause of this concern Why does this concern cause a no start condition? What other related components could cause this concern? NOTE: Return the workstation to its original condition Day Two-10 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE BENCH (FMT) STUDENT’S ANSWER SHEET NAME: DIRECTIONS: Use the SBTS or computer provided to complete a diagnosis within a simulated shop atmosphere Answer the following questions as you perform a diagnosis for the symptom: “Lack of Power.” Step 7-5 (Retrieve/Clear Continuous DTCs): Why is the Retrieve/Clear Continuous DTCs test step listed after the KOEO On-Demand test step? Step 7-8 (Check Continuous Fault Codes): Why does step 7-8 currently ignore any CMP-related continuous DTCs? Step 7-9 (Check for Biased ICP Sensor): Why would a biased ICP cause this concern? Step 7-13 (Check for Aerated Oil): List conditions other than aerated oil that could cause this test to fail Step 7-17 (Check Lubrication Pressure): How could failing this test have caused your concern? Step 7-18 (KOER On-Demand Self Test): What does DTC P1211 represent? Advanced Diesel Engine Performance Diagnosis February, 2000 Day Two-11 DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE BENCH (FMT) STUDENT’S ANSWER SHEET (Continued) Step 7-30 (Atmospheric Pressure Rationality Check): How could a MAP or BARO giving an inaccurate reading affect turbocharger boost? Did you find a cause for the “Lack of Power” concern? What other components that were not tested in this scenario could cause you to fail a boost pressure test? Day Two-12 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE (BENCH) STUDENT’S ANSWER SHEET NAME: DIRECTIONS: A fellow technician asks for your assistance and has made a recording of cold start-up PIDs on a vehicle that has been parked overnight The recording is made immediately after first startup Use the recording to answer the following questions and help diagnose the customer’s concern The vehicle is a 1999 F-250 (49 state) The symptom presented is: Hard Start/Long Crank Time and Rough Idle For a Period After Cold Start-Up Accompanied by White Smoke Keep in mind that verification of the symptom has been completed There is no OASIS or TSB information related to the customer concern Using Symptom to System to Component to Cause (SSCC), identify any systems that may cause this concern: Based upon the data in Record Area 1, can you identify a suspect component? Yes No If so, what component is suspected? If so, how did you arrive at this answer? Why was there no glow plug on-time? Advanced Diesel Engine Performance Diagnosis February, 2000 Day Two-13 DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE (BENCH) STUDENT’S ANSWER SHEET (Continued) Use the appropriate service publications for the vehicle to locate the specifications for the part being tested Use the following chart to record your findings: Measure Resistance Specification Component Actual Reading Can you accurately test a glow plug relay on the bench? Yes No Do any of the bench component(s) test faulty? Yes No If so, which component(s) tested faulty? 10 If so, what system does the faulty component(s) affect? 11 Is the resistance value of the EOT that you bench tested similar to the temperature for the EOT PID of the recording? Day Two-14 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY TWO WORKSTATION DIESEL ENGINE PERFORMANCE (BENCH) STUDENT’S ANSWER SHEET (Continued) BENCH EXERCISE A vehicle is in for a “Lack of Power” concern A fellow technician asks for your assistance and has made a recording of the vehicle during a road test Keep in mind that verification of the symptom has been completed There is no OASIS or TSB information related to the customer concern that you would use List the PIDs that you would use to identify a “Lack of Power” concern? Using Symptom to System to Component to Cause (SSCC), identify any systems that may cause this concern: Based upon the data in the Record Area ICP and IPR appear to be responding to driver demand? Yes No What PIDs would you use to judge the fuel volume being commanded by the PCM? What would prevent the PCM from delivering the amount of fuel demanded by the driver? Viewing the recording, identify a suspect system/component Advanced Diesel Engine Performance Diagnosis February, 2000 Day Two-15 DAY TWO NOTES Day Two-16 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY THREE DAY THREE AGENDA – MORNING The agenda for the day is as follows: NOTE: Times may be adjusted to coordinate with Training Center normal operating hours ACTIVITY TIME Begin Day Three 8:30 am Review of Day Two (Worksheets 1, 2, 3, 4) 8:30 am to 11:00 am (150 min) BREAK 11:00 am to 11:15 am (15 min) Post-Test Introductions 11:15 am to 11:30 am (15 min) LUNCH 11:30 am to 12:30 pm (60 min) DAY THREE AGENDA – AFTERNOON ACTIVITY TIME Post-Test Advanced Diesel Engine Performance Diagnosis 12:30 pm to 4:30 pm (240 min) February, 2000 Day Three-1 DAY THREE NOTES Day Three-2 February, 2000 Advanced Diesel Engine Performance Diagnosis GLOSSARY DIESEL ENGINE ELECTRONICS TERMINOLOGY The diesel engine electronic terminology used throughout this course is as follows: Absolute Pressure – Pressure relative to a complete vacuum Absolute pressure is usually measured in inches of mercury At sea level this is 29.9 in Hg Converted to pounds it is 14.7 psi Absolute pressure is used when atmospheric conditions are important in the reading of a particular pressure, such as MGP for boost control of the 7.3L DIT engine Absolute pressure = gauge pressure + atmospheric pressure Actuator – A device that delivers motion in response to vacuum, pressure or an electrical signal Afterglow – The continued heating of glow plugs after a diesel engine has started Ambient – The temperature of the air surrounding an object For an example, ambient temperature is the temperature in the garage where the vehicle is being repaired or the temperature outdoors where the vehicle is being operated Analog – A continuously variable voltage signal Atmospheric Pressure – The pressure due to the weight of the earth’s atmosphere At sea level, the atmosphere pressure is about 14.69 pounds per square inch and is affected by weather Atmospheric pressure is lower at altitudes above sea level Bank – A term used to indicate one side of an engine Example: left bank of the engine Boost – The term used for pressure produced by a turbocharger when it increases airflow into the combustion chamber Boost is usually measured in pounds per square inch (psi) Calibration – The data values used by the strategy in a processor to solve equations and make decisions Calibrations are stored in the ROM as scalars, functions and tables Calibration values are input into the processor during programming to allow the engine to operate within certain parameters Charge Air Cooling – A process of cooling the air coming out of the turbocharger before it enters the engine Closed Loop – An operating mode of the PCM in which the PCM samples input sensors to determine how much the command output actually changed Then, the PCM makes another change (if required) to produce the desired result Driver – A transistorized switch inside the PCM or module, which turns outputs on and off Diesel Thermal Recirculation Module (DTRM) – Located on the fuel Pick-Up unit, the purpose is two fold First, it screens fuel before it is drawn into the fuel pump Second, it helps to warm the fuel in the fuel system and maintain a controlled fuel temperature Duty Cycle – The ratio of the signal (“on”) time to the total length of the cycle (on time plus off time) Duty cycle is measured during one full cycle of a signal Duty cycle is expressed as a percentage Full Load – The condition where the load of the vehicle prevents an increase of engine RPM at WOT Gauge Pressure – The reading of pressure that starts at zero Used when atmospheric pressure is not important Hall Effect Sensor – A sensor that opens and closes a circuit electronically based on changes in magnetic flux Typically used for rpm or position measurement, such as the camshaft High Side – Term used to describe voltage or power side of an electronic circuit Idle Kicker – A strategy within the PCM that raises engine idle under certain conditions Advanced Diesel Engine Performance Diagnosis February, 2000 Glossary-1 GLOSSARY In-Range Failure – When a sensor value is not out of its operating limits, but its information in inaccurate Impedance – A form of opposition to current flow measured in ohms Keep Alive Random Access Memory – Information stored by the PCM in Keep Alive RAM (a memory integrated circuit chip) about vehicle operating conditions, and then uses this information to compensate for component variability Keep Alive RAM remains powered when the vehicle key is off so that this information is not lost Low Side – Commonly used to describe the ground side (0V) of an electronic circuit Modulate – The controlling of a solenoid by varying the amplitude or frequency of the voltage supplied to that solenoid An example of this would be the exhaust backpressure regulator Normally Closed – A normally closed switch allows the flow of electrical current Normally Open – The position the switch is designed to be in until it is actuated An open switch prevents the flow of electrical current Power Take Off (PTO) – An addition to the transmission which allows the transmission to operate optional accessories, such as a tow truck boom winch Potentiometer – A device that converts a mechanical movement to a voltage value It is most often used to sense the position of a component This sensor works as a variable voltage divider The wiper arm is mechanically connected to the moving part of the component to be sensed Potentiometers have three connections: VREF, signal out, and ground Pulse-Width – The length of time an actuator, such as an fuel injector, remains energized Rationality Check – The strategy used in diagnosis to determine if a sensor is supplying the correct value For example, when the key is turned to the ON position, the PID values are for the MAP and BARO sensors are used to determine if they are both reading atmospheric pressure Read Only Memory (ROM) – A type of memory used to store information permanently Information cannot be written to ROM; as the name implies, information can only be read from ROM Self-limiting – An electrical component that changes the current it uses to operate in relation to temperature Snapshot – A sample of a particular sensor value taken by the PCM at a particular time For example, the PCM takes a snapshot of the IAT sensor when the key is turned ON to determine whether to enable EBP Split Shot Injector (Prime) – An injector that provides improved exhaust emissions and quiet engine operation by tailoring the injection of fuel, without a decrease in performance Strategy – The operating programs within the PCM that allow it to provide outputs commands based on input values Thermistor – A resistor that changes its resistance with temperature Increasing temperature results in a decrease in resistance; decreasing temperature results in an increase in resistance Variable Capacitance – A sensor that stores an electrical charge corresponding to pressure and produces analog voltage signal being returned Usually used in pressure measurement Variable Force Solenoid – A solenoid that is controlled by a variable current from a module or processor By varying the current to the solenoid, force or pressure can be controlled Glossary-2 February, 2000 Advanced Diesel Engine Performance Diagnosis GLOSSARY DIESEL ENGINE ELECTRONICS ACRONYM LIST The diesel engine electronics acronyms are as follows: ACCS – Air Conditioning Clutch FDCS – Fuel Delivery Command Signal AP – Accelerator Pedal FMEM – Failure Mode Effects Management APC – Auxiliary Powertrain Control Module FP – Fuel Pump BARO – Barometric Pressure FPM – Fuel Pump Monitor BOO – Brake ON/OFF FPR – Fuel Pump Relay BPA – Brake Pressure Applied GPC – Glow Plug Control CAC – Charge Air Cooler GPL – Glow Plug Lamp CCS – Coast Clutch Solenoid GPR – Glow Plug Relay CID – Cylinder Identification G.C.V.W – Gross Combined Vehicle Weight CMP – Camshaft Position HEUI – Hydraulically Actuated, Electronic Controlled Unit Injector CPP – Clutch Pedal Position DIT – Direct Injection Turbocharged DLC – Data Link Connector DTC – Diagnostic Trouble Code DTR – Digital Transmission Range DTRM – Diesel Thermal Recirculation Module DVOM – Digital Volt Ohmmeter EBP – Exhaust Backpressure ECT – Engine Coolant Temperature EEC – Electronic Engine Control FEEPROM – Flash Electrically Erasable IAT – Intake Air Temperature ICP – Injection Control Pressure IDM – Injector Driver Module IDM_EN – Injector Driver Module Enable INJ – Injector IPR – Injector Pressure Regulator IVS – Idle Validation Switch KAM – Keep Alive Memory KOEO – Key ON Engine OFF KOER – Key ON Engine Running Programmable Read Only Memory MAP – Manifold Absolute Pressure EF – Electronic Feedback MAT – Manifold Air Temperature EOT – Engine Oil Temperature MCCC – Modulated Converter Clutch Control EPC – Electronic Pressure Control MIL – Malfunction Indicator Lamp Advanced Diesel Engine Performance Diagnosis February, 2000 Glossary-3 GLOSSARY MGP – Manifold Gauge Pressure SS – Shift Solenoid OBD – On-Board Diagnostics TACH – Tachometer OSM – Output State Monitor TCIL – Transmission Control Indicator Lamp OSS – Output Shaft Speed TCC – Torque Converter Clutch PBA – Parking Brake Applied TCS – Transmission Control Switch PC/ED – Powertrain Control/Emissions Diagnosis TFT – Transmission Fluid Temperature Manual TR – Transmission Range PCM – Powertrain Control Module TSS – Turbine Shaft Speed PID – Parameter Identification UVC Harness – Under Valve Cover Harness PSI – Pounds Per Square Inch VPWR – Vehicle Power/Battery Power PSIA – Absolute Pressure VREF – Voltage Reference PSIG – Gauge Pressure VSS –Vehicle Speed Signal PTO – Power Take Off WGC – Wastegate Control PWR GND – Power Ground WG – Wastegate RAM – Random Access Memory WIF – Water In Fuel ROM – Read Only Memory WIFIL – Water In Fuel Indicator Lamp RPM – Revolutions Per Minute WOT – Wide Open Throttle SCCS –Speed Control Command Switches SCP – Standard Corporate Protocol SIG RTN – Signal Return Glossary-4 February, 2000 Advanced Diesel Engine Performance Diagnosis ... Four of the diesel engine curriculum, Advanced Diesel Engine Performance Classroom Advanced Diesel Engine Performance Diagnosis February, 2000 Intro-1 INTRODUCTION ADVANCED DIESEL ENGINE PERFORMANCE. .. February, 2000 Advanced Diesel Engine Performance Diagnosis INTRODUCTION DIESEL ENGINE PERFORMANCE CURRICULUM ENGINE PERFORMANCE CURRICULUM PATH Diesel Engine Operation – SS Diesel Engine Electronics... of Day One Session Advanced Diesel Engine Performance Diagnosis 4:30 pm February, 2000 Day One-1 DAY ONE NOTES Day One-2 February, 2000 Advanced Diesel Engine Performance Diagnosis DAY ONE PREREQUISITE