Jeep Cherokee 2000 Service Manual - page 1227
FUEL SYSTEM—2.5L DIESEL ENGINE
TABLE OF CONTENTS
page
page
FUEL DELIVERY SYSTEM—2.5L DIESEL
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FUEL INJECTION SYSTEM—2.5L DIESEL
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
FUEL DELIVERY SYSTEM—2.5L DIESEL ENGINE
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FUEL SYSTEM PRESSURE WARNING . . . . . . . . . 2
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FUEL TANK MODULE . . . . . . . . . . . . . . . . . . . . . . 2
FUEL GAUGE SENDING UNIT . . . . . . . . . . . . . . . . 2
FUEL FILTER/WATER SEPARATOR . . . . . . . . . . . . 2
FUEL SHUTDOWN SOLENOID . . . . . . . . . . . . . . . 3
FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . . . 3
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 4
FUEL TUBES/LINES/HOSES AND CLAMPS—
LOW-PRESSURE TYPE . . . . . . . . . . . . . . . . . . . 4
QUICK-CONNECT FITTINGS—LOW
PRESSURE TYPE. . . . . . . . . . . . . . . . . . . . . . . . 5
HIGH-PRESSURE FUEL LINES . . . . . . . . . . . . . . . 5
FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . . . 6
FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . . . 6
DIAGNOSIS AND TESTING
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 6
VISUAL INSPECTION. . . . . . . . . . . . . . . . . . . . . . . 6
AIR IN FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . 9
FUEL HEATER RELAY TEST . . . . . . . . . . . . . . . . . 9
FUEL INJECTOR TEST . . . . . . . . . . . . . . . . . . . . 10
FUEL INJECTOR / NEEDLE MOVEMENT
SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . . 10
FUEL INJECTION PUMP TEST. . . . . . . . . . . . . . . 10
FUEL SUPPLY RESTRICTIONS . . . . . . . . . . . . . . 11
FUEL SHUTDOWN SOLENOID TEST . . . . . . . . . . 11
HIGH-PRESSURE FUEL LINE LEAK TEST . . . . . . 11
SERVICE PROCEDURES
AIR BLEED PROCEDURES . . . . . . . . . . . . . . . . . 12
FUEL INJECTION PUMP TIMING . . . . . . . . . . . . . 13
REMOVAL AND INSTALLATION
ACCELERATOR PEDAL . . . . . . . . . . . . . . . . . . . . 13
FUEL DRAIN TUBES . . . . . . . . . . . . . . . . . . . . . . 14
FUEL FILTER/WATER SEPARATOR . . . . . . . . . . . 14
FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FUEL HEATER RELAY . . . . . . . . . . . . . . . . . . . . . 15
FUEL LEVEL SENSOR . . . . . . . . . . . . . . . . . . . . . 15
FUEL INJECTION PUMP . . . . . . . . . . . . . . . . . . . 15
FUEL INJECTORS . . . . . . . . . . . . . . . . . . . . . . . . 19
FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FUEL RESERVOIR MODULE . . . . . . . . . . . . . . . . 21
HIGH-PRESSURE LINES . . . . . . . . . . . . . . . . . . . 22
SPECIFICATIONS
FUEL TANK CAPACITY . . . . . . . . . . . . . . . . . . . . 22
IDLE SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FUEL INJECTOR FIRING SEQUENCE . . . . . . . . . 22
FUEL SYSTEM PRESSURE . . . . . . . . . . . . . . . . . 22
DESCRIPTION AND OPERATION
INTRODUCTION
DESCRIPTION
This Fuel Delivery section will cover components
not controlled by the PCM. For components con-
trolled by the PCM, refer to the Fuel Injection Sys-
tem—2.5L Diesel Engine section of this group.
The fuel heater relay, fuel heater and fuel gauge
are not operated by the PCM. These components are
controlled by the ignition (key) switch. All other fuel
system electrical components necessary to operate
the engine are controlled or regulated by the PCM.
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