Jeep 1996 Grand Cherokee Service Manual - page 1069
FUEL INJECTION SYSTEM
INDEX
page
page
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 25
MODES OF OPERATION . . . . . . . . . . . . . . . . . . 26
DESCRIPTION AND OPERATION
OXYGEN SENSOR (O2S)—PCM INPUT . . . . . . . 32
AIR CONDITIONING (A/C) CLUTCH RELAY—
PCM OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . 35
AIR CONDITIONING (A/C) CONTROLS—PCM
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
AUTO SHUTDOWN (ASD) RELAY—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
AUTOMATIC SHUTDOWN (ASD) RELAY
SENSE—PCM INPUT . . . . . . . . . . . . . . . . . . . 29
BATTERY TEMPERATURE SENSOR—PCM
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
BATTERY VOLTAGE—PCM INPUT . . . . . . . . . . . 30
BRAKE SWITCH—PCM INPUT . . . . . . . . . . . . . . 30
CAMSHAFT POSITION SENSOR—PCM INPUT . 30
CRANKSHAFT POSITION SENSOR—4.0L
ENGINE—PCM INPUT . . . . . . . . . . . . . . . . . . 31
CRANKSHAFT POSITION SENSOR—5.2L
ENGINES—PCM INPUT . . . . . . . . . . . . . . . . . 30
DATA LINK CONNECTOR—PCM INPUT AND
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
DUTY CYCLE EVAP PURGE SOLENOID
VALVE-PCM OUTPUT . . . . . . . . . . . . . . . . . . . 36
ENGINE COOLANT TEMPERATURE SENSOR—
4.0L ENGINE—PCM INPUT
. . . . . . . . . . . . . . 31
ENGINE COOLANT TEMPERATURE SENSOR—
5.2L ENGINES—PCM INPUT
. . . . . . . . . . . . . 31
FIVE VOLT SENSOR SUPPLY—PRIMARY . . . . . 30
FIVE VOLT SENSOR SUPPLY—SECONDARY . . 30
FUEL INJECTORS—4.0L ENGINE—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FUEL INJECTORS—5.2L ENGINES—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FUEL LEVEL SENSOR—PCM INPUT . . . . . . . . . 30
FUEL PUMP RELAY-PCM OUTPUT . . . . . . . . . . 37
GENERATOR FIELD—PCM OUTPUT . . . . . . . . . 37
GENERATOR LAMP—PCM OUTPUT . . . . . . . . . 37
IDLE AIR CONTROL (IAC) MOTOR—4.0L
ENGINE—PCM OUTPUT . . . . . . . . . . . . . . . . . 37
IDLE AIR CONTROL (IAC) MOTOR—5.2L
ENGINES—PCM OUTPUT . . . . . . . . . . . . . . . . 37
IGNITION CIRCUIT SENSE—PCM INPUT . . . . . 32
IGNITION COIL—4.0L ENGINES—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
IGNITION COIL—5.2L ENGINES—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR—4.0L ENGINE—PCM INPUT . . . . . . 32
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR—5.2L ENGINES—PCM INPUT . . . . . 32
MALFUNCTION INDICATOR (CHECK ENGINE)
LAMP—PCM OUTPUT . . . . . . . . . . . . . . . . . . 38
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—4.0L ENGINE—PCM INPUT . . . . . . 33
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—5.2L ENGINES—PCM INPUT . . . . . 33
OUTPUT SHAFT SPEED SENSOR—PCM
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
OVERDRIVE LAMP—PCM OUTPUT . . . . . . . . . . 38
OVERDRIVE/OVERRIDE SWITCH-PCM INPUT . 33
POWER GROUND . . . . . . . . . . . . . . . . . . . . . . . 35
POWERTRAIN CONTROL MODULE (PCM) . . . . 28
SPEED CONTROL SOLENOIDS—
PCM OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . 38
SPEED CONTROL SWITCHES—PCM INPUT . . . 34
SYSTEM DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . 28
TACHOMETER—PCM OUTPUT . . . . . . . . . . . . . 38
THREE-FOUR SHIFT SOLENOID—PCM
OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
THROTTLE BODY—4.0L ENGINE . . . . . . . . . . . 40
THROTTLE BODY—5.2L ENGINES . . . . . . . . . . 39
THROTTLE POSITION SENSOR (TPS)—4.0L
ENGINE—PCM INPUT . . . . . . . . . . . . . . . . . . 34
THROTTLE POSITION SENSOR (TPS)—5.2L
ENGINE—PCM INPUT . . . . . . . . . . . . . . . . . . 34
TORQUE CONVERTOR CLUTCH (TCC)
SOLENOID—PCM OUTPUT . . . . . . . . . . . . . . 39
TRANSMISSION GOVERNOR PRESSURE
SENSOR—PCM INPUT . . . . . . . . . . . . . . . . . . 34
TRANSMISSION PARK/NEUTRAL SWITCH—
PCM INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
TRANSMISSION RELAY—PCM OUTPUT . . . . . . 39
TRANSMISSION TEMPERATURE SENSOR—
PCM INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
VARIABLE FORCE SOLENOID—PCM OUTPUT . 39
VEHICLE SPEED AND DISTANCE SENSOR—
PCM INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DIAGNOSIS AND TESTING
ASD AND FUEL PUMP RELAYS . . . . . . . . . . . . . 46
CAMSHAFT AND CRANKSHAFT POSITION
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
ENGINE COOLANT TEMPERATURE SENSOR—
4.0L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . 50
ENGINE COOLANT TEMPERATURE SENSOR—
5.2L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . 49
IDLE AIR CONTROL (IAC) MOTOR—4.0L
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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FUEL SYSTEM
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