Dodge 2000 DURANGO Service Manual page 747

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DESCRIPTION AND OPERATION
POWERTRAIN CONTROL MODULE (PCM) . . . . . 28
MODES OF OPERATION . . . . . . . . . . . . . . . . . . . 29
AUTOMATIC SHUTDOWN (ASD) RELAY
SENSE—PCM INPUT . . . . . . . . . . . . . . . . . . . . 31
BATTERY VOLTAGE—PCM INPUT. . . . . . . . . . . . 31
BRAKE SWITCH—PCM INPUT. . . . . . . . . . . . . . . 31
ENGINE COOLANT TEMPERATURE
SENSOR—PCM INPUT . . . . . . . . . . . . . . . . . . . 32
FIVE VOLT SENSOR SUPPLIES—PRIMARY
AND SECONDARY . . . . . . . . . . . . . . . . . . . . . . 32
FUEL LEVEL SENSOR—PCM INPUT . . . . . . . . . . 32
IGNITION CIRCUIT SENSE—PCM INPUT . . . . . . 32
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR—PCM INPUT . . . . . . . . . . . . . . . . . . . 32
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—PCM INPUT . . . . . . . . . . . . . . . . . . . 33
OIL PRESSURE SENSOR—PCM INPUT . . . . . . . 34
OXYGEN SENSOR (O2S)—PCM INPUT. . . . . . . . 34
POWER GROUNDS . . . . . . . . . . . . . . . . . . . . . . . 35
POWER STEERING PRESSURE SWITCH—
PCM INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
SENSOR RETURN—PCM INPUT . . . . . . . . . . . . . 36
SIGNAL GROUND—PCM INPUT . . . . . . . . . . . . . 36
THROTTLE POSITION SENSOR (TPS)—PCM
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
VEHICLE SPEED AND DISTANCE—PCM
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
AUTO SHUTDOWN (ASD) RELAY—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
CCD BUS (+/-) CIRCUITS-PCM OUTPUTS . . . . . . 37
DATA LINK CONNECTOR—PCM INPUT AND
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FUEL INJECTORS—PCM OUTPUT . . . . . . . . . . . 37
FUEL PUMP RELAY-PCM OUTPUT . . . . . . . . . . . 37
IDLE AIR CONTROL (IAC) MOTOR—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
OXYGEN SENSOR HEATER RELAYS—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
RADIATOR COOLING FAN RELAY—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
FUEL INJECTION SYSTEM
TABLE OF CONTENTS
page
THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . . . . 39
DIAGNOSIS AND TESTING
VISUAL INSPECTION—3.9/5.2/5.9L ENGINES . . . 39
ASD AND FUEL PUMP RELAYS . . . . . . . . . . . . . . 42
THROTTLE BODY MINIMUM AIR FLOW
CHECK PROCEDURE . . . . . . . . . . . . . . . . . . . . 43
REMOVAL AND INSTALLATION
AUTOMATIC SHUTDOWN (ASD) RELAY . . . . . . . 44
FUEL PUMP RELAY . . . . . . . . . . . . . . . . . . . . . . . 44
OXYGEN SENSOR HEATER RELAYS . . . . . . . . . 45
THROTTLE BODY—3.9/5.2/5.9L ENGINES . . . . . . 45
THROTTLE BODY—4.7L V-8 ENGINE . . . . . . . . . 45
THROTTLE POSITION SENSOR (TPS)—3.9/
5.2/5.9L ENGINES . . . . . . . . . . . . . . . . . . . . . . . 46
THROTTLE POSITION SENSOR (TPS)—4.7L
V-8 ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
IDLE AIR CONTROL (IAC) MOTOR—3.9/5.2/
5.9L ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . 47
IDLE AIR CONTROL (IAC) MOTOR—4.7L V–8
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—3.9/5.2/5.9L ENGINES . . . . . . . . . . . 48
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—4.7L V–8 ENGINE . . . . . . . . . . . . . . 49
POWERTRAIN CONTROL MODULE (PCM) . . . . . 49
OXYGEN SENSOR. . . . . . . . . . . . . . . . . . . . . . . . 50
AIR CLEANER ELEMENT (FILTER) . . . . . . . . . . . 50
ENGINE COOLANT TEMPERATURE
SENSOR—3.9/5.2/5.9L ENGINES . . . . . . . . . . . 50
ENGINE COOLANT TEMPERATURE
SENSOR—4.7L V-8 ENGINE . . . . . . . . . . . . . . . 51
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR—3.9/5.2/5.9L ENGINES . . . . . . . . . . . 52
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR—4.7L V-8 ENGINE . . . . . . . . . . . . . . . 53
POWER STEERING PRESSURE SWITCH . . . . . . 54
SPECIFICATIONS
TORQUE CHART . . . . . . . . . . . . . . . . . . . . . . . . . 54
SPECIAL TOOLS
FUEL SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . 54
FUEL SYSTEM 14 - 27
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