Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1997.1999-2001 Approved 2000 XJ Jeep Cherokee exj_14a

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XJ                                                                                FUEL SYSTEM--2.5L DIESEL ENGINE                          14 - 1



                            FUEL SYSTEM--2.5L DIESEL ENGINE
                                                      TABLE OF CONTENTS

                                                                  page                                                                       page

FUEL DELIVERY SYSTEM--2.5L DIESEL                                           FUEL INJECTION SYSTEM--2.5L DIESEL
 ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1    ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23



               FUEL DELIVERY SYSTEM--2.5L DIESEL ENGINE

                                                            TABLE OF CONTENTS
                                                                  page                                                                       page

DESCRIPTION AND OPERATION                                                    FUEL INJECTION PUMP TEST. . . . . . . . . . . . . . . 10
  INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1         FUEL SUPPLY RESTRICTIONS . . . . . . . . . . . . . . 11
  FUEL SYSTEM PRESSURE WARNING . . . . . . . . . 2                           FUEL SHUTDOWN SOLENOID TEST . . . . . . . . . . 11
  FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2    HIGH-PRESSURE FUEL LINE LEAK TEST . . . . . . 11
  FUEL TANK MODULE . . . . . . . . . . . . . . . . . . . . . . 2            SERVICE PROCEDURES
  FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . . . 2                  AIR BLEED PROCEDURES . . . . . . . . . . . . . . . . . 12
  FUEL FILTER/WATER SEPARATOR . . . . . . . . . . . . 2                      FUEL INJECTION PUMP TIMING . . . . . . . . . . . . . 13
  FUEL SHUTDOWN SOLENOID . . . . . . . . . . . . . . . 3                    REMOVAL AND INSTALLATION
  FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . . . 3              ACCELERATOR PEDAL . . . . . . . . . . . . . . . . . . . . 13
  FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 4         FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . . 14
  FUEL TUBES/LINES/HOSES AND CLAMPS--                                        FUEL FILTER/WATER SEPARATOR . . . . . . . . . . . 14
    LOW-PRESSURE TYPE . . . . . . . . . . . . . . . . . . . 4                FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
  QUICK-CONNECT FITTINGS--LOW                                                FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . . 15
    PRESSURE TYPE. . . . . . . . . . . . . . . . . . . . . . . . 5           FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . . . 15
  HIGH-PRESSURE FUEL LINES . . . . . . . . . . . . . . . 5                   FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . . 15
  FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . . . 6           FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . 19
  FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6      FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
  FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . . . 6            FUEL RESERVOIR MODULE . . . . . . . . . . . . . . . . 21
DIAGNOSIS AND TESTING                                                        HIGH-PRESSURE LINES . . . . . . . . . . . . . . . . . . . 22
  GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 6               SPECIFICATIONS
  VISUAL INSPECTION. . . . . . . . . . . . . . . . . . . . . . . 6           FUEL TANK CAPACITY . . . . . . . . . . . . . . . . . . . . 22
  AIR IN FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . 9           IDLE SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
  FUEL HEATER RELAY TEST . . . . . . . . . . . . . . . . . 9                 FUEL INJECTOR FIRING SEQUENCE . . . . . . . . . 22
  FUEL INJECTOR TEST . . . . . . . . . . . . . . . . . . . . 10              FUEL SYSTEM PRESSURE . . . . . . . . . . . . . . . . . 22
  FUEL INJECTOR / NEEDLE MOVEMENT
    SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . . 10

DESCRIPTION AND OPERATION                                                   trolled by the PCM, refer to the Fuel Injection Sys-
                                                                            tem--2.5L Diesel Engine section of this group.
INTRODUCTION                                                                  The fuel heater relay, fuel heater and fuel gauge
                                                                            are not operated by the PCM. These components are
DESCRIPTION                                                                 controlled by the ignition (key) switch. All other fuel
  This Fuel Delivery section will cover components                          system electrical components necessary to operate
not controlled by the PCM. For components con-                              the engine are controlled or regulated by the PCM.
14 - 2   FUEL SYSTEM--2.5L DIESEL ENGINE                                                                    XJ
DESCRIPTION AND OPERATION (Continued)

FUEL SYSTEM PRESSURE WARNING                            FUEL TANK MODULE
DESCRIPTION                                             DESCRIPTION
                                                          An electric fuel pump is not attached to the fuel
WARNING: HIGH



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