JAGUAR ENGINE MANAGEMENT SYSTEMS: AJ16 …

1 JAGUAR SERVICE TRAININGJAGUAR SERVICE TRAINING Publication T801S 2000 JAGUAR CarsPRINTED IN USA This publication is intended for instructional purposes only. Always refer to the appropriate JAGUAR Service publication for specific details and procedures. All rights reserved. All material contained herein is based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice. JAGUAR ENGINE MANAGEMENT SYSTEMS: aj16 OBD II; AJ6 OBD I; V12 OBD I/IISELF STUDY SELF-STUDY TRAINING COURSE 801S Service Training INTRODUCTION Welcome to the JAGUAR ENGINE MANAGEMENT Systems Self-Study Course.

2 This course is intended to provide an overview of JAGUAR ENGINE MANAGEMENT Systems prior to your attending the instructor-led JAGUAR Service Training Course: V6/V8 ENGINE MANAGEMENT . The contents of this self-study book also serve as your archival information for earlier JAGUAR ENGINE MANAGEMENT course and the accompanying test must be completed prior to attending the JAGUAR Service Training Course: V6/V8 ENGINE MANAGEMENT unless you have already completed the instructor-led Service Training Course complete this course: Thoroughly review the material in this manual, which is categorized by system version.

3 Once you have invested adequate study time, review the Student Proficiency Test at the end of this manual. Fill out the answer sheet, making sure you include your name, your Social Security number and your Dealer Name. When complete, fax or mail your answer sheet to: JAGUAR Cars Service Training DepartmentATTN: Service Training Administrator555 MacArthur BoulevardMahwah, New Jersey 07430 FAX: (201) 818-9074 Thank you for your participation. JAGUAR SERVICE TRAININGJAGUAR SERVICE TRAINING JAGUAR ENGINE MANAGEMENT SYSTEMS: CONTROL FUNDAMENTALSCONTROLFUNDAMENTALS Service Training Course 801S 1 ENGINE MANAGEMENT SYSTEMS CONTROL OVERVIEW 2 JAGUAR ENGINE MANAGEMENTSYSTEMS JAGUAR EMS: CONTROL fundamentals Service Training Guide ENGINE MANAGEMENT system (EMS) CONTROL OVERVIEW The primary purpose of ENGINE MANAGEMENT is to provide comprehensive ENGINE control, which will produce a low lev-el of vehicle powertrain emissions that meets clean air quality standards.

4 Powertrain emission sources: ENGINE exhaust emission Evaporative emissions from the fuel system and ENGINE crankcaseIn addition to emission control, the EMS must deliver: High quality ENGINE operation Powertrain performance Vehicle drive qualityClean air quality standards are interpreted into motor vehicle emission legislation that is known as On Board Diagnos-tics (OBD). The first level OBD applied through vehicle model year 1994 and is known as OBD I. The second level OBD applied to vehicle model year 1995 and remains in effect today. This standard is knownas OBD standards are constantly evolving to produce a continuing reduction in vehicle powertrain emissions.

5 As thesestandards evolve, ENGINE MANAGEMENT systems must become more comprehensive and more capable in order to meetthe ever more stringent standards. NOTES Student JAGUAR EMS: CONTROL fundamentals Service Training ENGINE Control Module (ECM) The ENGINE MANAGEMENT system is centered around a digital ENGINE control module (ECM). The ECM receives input sig-nals from ENGINE sensors to evaluate ENGINE operating conditions. In addition, the ECM communicates with otherpowertrain systems and vehicle systems. The ECM then processes the sensor information and the information receivedfrom other systems using programmed software strategies and issues control output signals to the ENGINE and emissioncontrol functional systems.

6 At its very basic level of control the ECM: takes ENGINE speed and load input signals applies correction factor inputs and emissions control feedback signals processes the signals to access pre-programmed software strategies outputs control signals to the various ENGINE and emission components. During this process, the ECM employs diagnostic tests to monitor and report ENGINE MANAGEMENT system faults. Faults arestored in ECM memory as codes. Technician access to the fault codes and data is gained through a diagnostic data link. NOTESPROCESSINGECMOUTPUTSINPUTSINPUT SIGNAL PROCESSINGENGINE SPEEDCONTROL OUTPUTSDIAGNOSTIC MONITORINGENGINE LOADENGINE CORRECTION FACTORSEMISSIONS CONTROL FEEDBACKPOWERTRAINVEHICLEFUEL INJECTION CONTROLIGNITION CONTROLEMISSION CONTROLDIAGNOSTIC DATA LINKBASIC ENGINE MANAGEMENT JAGUAR EMS: CONTROL fundamentals Service Training Guide JAGUAR SERVICE TRAININGJAGUAR SERVICE TRAINING JAGUAR ENGINE MANAGEMENT SYSTEMS: CONTROL FUNDAMENTALSCONTROLFUNDAMENTALS Service Training Course 801S Important note regarding the information contained in this section.

7 The systems and components described herein are intended only to give the reader afoundation on which to build a complete understanding of current JAGUAR ENGINE manage-ment systems. Therefore, the information is based on out of production systems, whichhave less comprehensive control sub systems, components, and functions may not apply directly to a specificengine MANAGEMENT system , or may be added or deleted for the sake of clarity. For a complete understanding of a specific JAGUAR ENGINE MANAGEMENT system , refer to thepublication(s) describing that system . 1 ENGINE MANAGEMENT SYSTEMS CONTROL OVERVIEW 2 JAGUAR ENGINE MANAGEMENTSYSTEMS JAGUAR EMS: CONTROL fundamentals Service Training Guide JAGUAR ENGINE MANAGEMENT SYSTEMS JAGUAR ENGINE MANAGEMENT systems achieve reduced powertrain emissions by combining ECM control with othermechanical and vacuum operated systems.

8 These systems can generally be recognized by a mechanical throttle sys-tem. The combined systems include the following: Fuel injection control grouped fuel injection Ignition control timing Idle intake air control Control of emission related systems and components such as: Evaporative emissions canister purge valve Exhaust gas recirculation Air injection Interface (hard wire) with other powertrain components such as: ENGINE cranking Transmission control module (TCM) A/C compressor clutch Instrument pack Interface (hard wire) with other vehicle systems such as: Instrument pack ENGINE related mechanical and vacuum operated systems considered part of ENGINE MANAGEMENT : Throttle body and air intake system Ignition distributor Exhaust system / catalytic converter(s) Fuel tank, piping and evaporative emission equipment Fuel pressure regulator and fuel rail Adaptive learning: Idle fuel metering On-board diagnostic monitoring and reporting: Diagnostic monitoring ENGINE default operation Diagnostic data link NOTES Student JAGUAR EMS.

9 CONTROL fundamentals Service TrainingPROCESSINGECMENGINE SENSORSOUTPUTSINPUTSINPUT SIGNAL PROCESSINGENGINE SPEEDCRANKSHAFT POSITIONENGINE LOADENGINE TEMPERATUREINTAKE AIR TEMPERATUREDRIVER DEMANDEXHAUST OXYGEN CONTENTEGR FEEDBACKPOWERTRAINTRANSMISSIONCONTROL MODULE PARK / NEUTRAL SHIFT IN PROGRESSA/C COMPRESSOR CLUTCHENGINE CRANKINGVEHICLEINSTRUMENT PACK VEHICLE SPEED FUEL QUANTITYINERTIA SWITCHENGINE CONTROLFUEL PUMPGROUPED FUEL INJECTIONIGNITION TIMINGIDLE SPEEDEVAPORATIVE EMISSIONPURGE VALVEEXHAUST GAS RECIRCULATIONAIR INJECTIONENGINE SPEED LIMITENGINE DEFAULT OPERATIONPOWERTRAINTRANSMISSIONCONTROL MODULE ENGINE SPEED ENGINE LOAD DRIVER DEMANDVEHICLEINSTRUMENT PACK ENGINE SPEED FUEL USED OBD FAULT WARNINGDIAGNOSTIC DATA LINKCONTROL OUTPUTSADAPTIVE LEARNINGDIAGNOSTIC MONITORINGJAGUAR ENGINE MANAGEMENT JAGUAR EMS.

10 CONTROL fundamentals Service Training Guide ECM JAGUAR ENGINE MANAGEMENT SYSTEMS ENGINE Control Module Inputs ENGINE speed / crankshaft position The crankshaft position sensor (CKP Sensor) is an inductive pulse generator that supplies theECM with both an ENGINE speed and crankshaft position alternating voltage signal. The sensor islocated either on the timing cover or at the rear of the ENGINE . The reluctor, mounted on the crankshaft, has a number of teeth with one or two removed toform a gap, which creates a missing pulse. The missing pulse allows the ECM to determine thecrankshaft position for fuel injector pulse speed is one of the two main factors in determining fuel injector pulse duration (fuelmetering) and ignition timing.