The battery input also provides the voltage that is
needed to keep the PCM memory alive. The memory
stores Diagnostic Trouble Code (DTC) messages.
Trouble codes will still be stored even if the battary
voltage is lost.
SENSOR RETURN—ECM/PCM INPUT (ANALOG
GROUND)
DESCRIPTION
Sensor Return provides a low noise Analog ground
reference for all system sensors.
IGNITION CIRCUIT SENSE—ECM/PCM INPUT
DESCRIPTION
The ignition circuit sense input signals the ECM
and PCM that the ignition (key) switch has been
turned to the ON position. This signal initiates the
glow plug control routine to begin the “pre–heat”
cycle.
IGNITION CIRCUIT SENSE—PCM INPUT
The ignition circuit sense input signals the PCM
that the ignition (key) switch has been turned to the
ON position. This signal initiates the glow plug con-
trol routine to begin the “pre–heat” cycle.
POWER GROUND
DESCRIPTION
Provides a common ground for power devices (sole-
noid and relay devices).
NEEDLE MOVEMENT OR INTRUMENTED FIRST
INJECTOR—ECM INPUT
DESCRIPTION
This input from the ECM supplies a constant 30
mA electrical current source for the first injector sen-
sor. It will vary the voltage to this sensor when it
senses a mechanical movement within the injector
needle (pintle) of the number–1 cylinder fuel injector.
When this voltage has been determined by the ECM,
it will then control an output to the fuel timing sole-
noid (the fuel timing solenoid is located on the fuel
injection pump). Also refer to Fuel Injection Pump for
additional information.
The first injector sensor is a magnetic (inductive)
type.
The first injector sensor is used only on the fuel
injector for the number–1 cylinder (Fig. 4). It is not
used on the injectors for cylinders number 2, 3, or 4.
FUEL INJECTOR SENSOR—GROUND
DESCRIPTION
Provides a low noise ground for the fuel injector
sensor only.
ENGINE COOLANT TEMPERATURE SENSOR—
ECM/PCM INPUT
DESCRIPTION
The 0–5 volt input from this sensor tells the ECM
and PCM the temperature of the engine coolant.
Based on the voltage received at the ECM, it will
then determine operation of the fuel timing solenoid,
glow plug relay, electrical vacuum modulator (emis-
sion component) and generator (charging system).
The sensor is located on the side of the #3 cylinder
head near the rear of fuel injection pump (Fig. 5).
ENGINE SPEED SENSOR—ECM INPUT
DESCRIPTION
The engine speed sensor is mounted to the trans-
mission bellhousing at the left/rear side of the engine
block (Fig. 6).
The engine speed sensor produces its own output
signal. If this signal is not received, the ECM will not
allow the engine to start.
The engine speed sensor input is used in conjunc-
tion with the first injector sensor to establish fuel
injection pump timing.
Fig. 4 Fuel Injector Sensor
1 – NEEDLE MOVEMENT SENSOR
2 – FUEL INJECTOR (NUMBER 1 CYLINDER ONLY)
3 – COPPER WASHER
4 – SENSOR CONNECTOR
14 - 26
FUEL SYSTEM—2.5L DIESEL ENGINE
XJ
DESCRIPTION AND OPERATION (Continued)
Summary of Contents for 200 Cherokee
Page 5: ...FASTENER IDENTIFICATION 4 INTRODUCTION XJ DESCRIPTION AND OPERATION Continued ...
Page 6: ...FASTENER STRENGTH XJ INTRODUCTION 5 DESCRIPTION AND OPERATION Continued ...
Page 8: ...METRIC CONVERSION CHART XJ INTRODUCTION 7 DESCRIPTION AND OPERATION Continued ...
Page 9: ...TORQUE SPECIFICATIONS 8 INTRODUCTION XJ DESCRIPTION AND OPERATION Continued ...
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Page 107: ...Fig 105 Gear Tooth Contact Patterns 3 60 TUBE 181 AND 186 FBI AXLE XJ ADJUSTMENTS Continued ...
Page 111: ...Installer D 144 Installer W 262 3 64 TUBE 181 AND 186 FBI AXLE XJ SPECIAL TOOLS Continued ...
Page 145: ...Fig 79 Gear Tooth Contact Patterns 3 98 194 RBI AXLE XJ ADJUSTMENTS Continued ...
Page 177: ...Fig 59 Gear Tooth Contact Patterns 3 130 8 1 4 REAR AXLE XJ ADJUSTMENTS Continued ...
Page 230: ...Fig 8 Clutch Components And Inspection XJ CLUTCH 6 5 DIAGNOSIS AND TESTING Continued ...
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Page 484: ...SPECIAL TOOLS HEADLAMP ALIGNMENT Headlamp Aiming Kit C 4466 A XJ LAMPS 8L 9 ...
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Page 1072: ...Fig 16 2 5L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 25 DESCRIPTION AND OPERATION Continued ...
Page 1073: ...Fig 17 4 0L Engine 8W 90 26 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued ...
Page 1074: ...Fig 18 4 0L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 27 DESCRIPTION AND OPERATION Continued ...
Page 1087: ...Fig 31 Liftgate 8W 90 40 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued ...
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Page 1331: ...Fig 6 Frame Dimensions 13 8 FRAME AND BUMPERS XJ SPECIFICATIONS Continued ...
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Page 1912: ...Fig 3 Hood Components XJ BODY 23 25 REMOVAL AND INSTALLATION Continued ...
Page 1955: ...WELD LOCATIONS UPPER COWL 23 68 BODY XJ SPECIFICATIONS Continued ...
Page 1956: ...UPPER COWL XJ BODY 23 69 SPECIFICATIONS Continued ...
Page 1957: ...COWL 23 70 BODY XJ SPECIFICATIONS Continued ...
Page 1958: ...A PILLAR XJ BODY 23 71 SPECIFICATIONS Continued ...
Page 1959: ...A PILLAR 23 72 BODY XJ SPECIFICATIONS Continued ...
Page 1960: ...A PILLAR XJ BODY 23 73 SPECIFICATIONS Continued ...
Page 1961: ...A PILLAR 23 74 BODY XJ SPECIFICATIONS Continued ...
Page 1962: ...B PILLAR XJ BODY 23 75 SPECIFICATIONS Continued ...
Page 1963: ...D PILLAR 23 76 BODY XJ SPECIFICATIONS Continued ...
Page 1964: ...FUEL FILLER OPENING XJ BODY 23 77 SPECIFICATIONS Continued ...
Page 1965: ...CARGO AREA FLOOR PAN 23 78 BODY XJ SPECIFICATIONS Continued ...
Page 1966: ...ROOF AND D PILLAR XJ BODY 23 79 SPECIFICATIONS Continued ...
Page 1967: ...LIFTGATE OPENING 23 80 BODY XJ SPECIFICATIONS Continued ...
Page 1968: ...ROOF XJ BODY 23 81 SPECIFICATIONS Continued ...
Page 1969: ...ROOF 23 82 BODY XJ SPECIFICATIONS Continued ...
Page 1970: ...FRAME RAIL XJ BODY 23 83 SPECIFICATIONS Continued ...
Page 1971: ...FRAME RAIL 23 84 BODY XJ SPECIFICATIONS Continued ...
Page 1972: ...FRAME RAIL XJ BODY 23 85 SPECIFICATIONS Continued ...
Page 1973: ...FRAME RAIL 23 86 BODY XJ SPECIFICATIONS Continued ...
Page 1974: ...REINFORCEMENT XJ BODY 23 87 SPECIFICATIONS Continued ...
Page 1975: ...FRONT INNER FENDER 23 88 BODY XJ SPECIFICATIONS Continued ...
Page 1976: ...FRONT INNER FENDER AND RADIATOR CLOSURE PANEL XJ BODY 23 89 SPECIFICATIONS Continued ...
Page 1977: ...REINFORCEMENT 23 90 BODY XJ SPECIFICATIONS Continued ...
Page 1978: ...FRONT FENDER XJ BODY 23 91 SPECIFICATIONS Continued ...
Page 1979: ...BODY SIDE 23 92 BODY XJ SPECIFICATIONS Continued ...
Page 1980: ...REAR WHEELHOUSE XJ BODY 23 93 SPECIFICATIONS Continued ...
Page 1981: ...REAR INNER WHEELHOUSE 23 94 BODY XJ SPECIFICATIONS Continued ...
Page 1982: ...BODY SIDE XJ BODY 23 95 SPECIFICATIONS Continued ...
Page 1983: ...BODY SIDE 23 96 BODY XJ SPECIFICATIONS Continued ...
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Page 1988: ...UNDERBODY XJ BODY 23 101 SPECIFICATIONS Continued ...
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Page 1997: ...UNDERBODY 23 110 BODY XJ SPECIFICATIONS Continued ...
Page 1998: ...UNDERBODY XJ BODY 23 111 SPECIFICATIONS Continued ...
Page 1999: ...BODY SEALING LOCATIONS APPLICATION METHODS 23 112 BODY XJ SPECIFICATIONS Continued ...
Page 2000: ...COWL AND DASH PANEL XJ BODY 23 113 SPECIFICATIONS Continued ...
Page 2001: ...DASH PANEL AND FLOOR PAN 23 114 BODY XJ SPECIFICATIONS Continued ...
Page 2002: ...FLOOR PAN XJ BODY 23 115 SPECIFICATIONS Continued ...
Page 2003: ...REAR INNER WHEELHOUSE 23 116 BODY XJ SPECIFICATIONS Continued ...
Page 2004: ...FRONT INNER WHEELHOUSE XJ BODY 23 117 SPECIFICATIONS Continued ...
Page 2005: ...BODY SIDE 23 118 BODY XJ SPECIFICATIONS Continued ...
Page 2006: ...BODY SIDE XJ BODY 23 119 SPECIFICATIONS Continued ...
Page 2007: ...BODY SIDE 23 120 BODY XJ SPECIFICATIONS Continued ...
Page 2008: ...ROOF PANEL XJ BODY 23 121 SPECIFICATIONS Continued ...
Page 2009: ...FUEL FILLER HOUSING 23 122 BODY XJ SPECIFICATIONS Continued ...
Page 2010: ...LIFTGATE OPENING XJ BODY 23 123 SPECIFICATIONS Continued ...
Page 2011: ...STRUCTURAL ADHESIVE LOCATIONS LEFT QUARTER PANEL 23 124 BODY XJ SPECIFICATIONS Continued ...
Page 2012: ...REAR WHEELHOUSE XJ BODY 23 125 SPECIFICATIONS Continued ...
Page 2013: ...ROOF BOWS 23 126 BODY XJ SPECIFICATIONS Continued ...
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