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
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