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PEDAL - ACCELERATOR
REMOVAL .................................... 46
INSTALLATION ............................... 46
SENSOR-ACCELERATOR PEDAL POSITION
DESCRIPTION ................................ 47
OPERATION .................................. 47
REMOVAL .................................... 47
INSTALLATION ............................... 48
SENSOR-CRANKSHAFT POSITION
DESCRIPTION
3.7L V-6 .................................... 49
4.7L V-8 .................................... 49
5.7L V-8 .................................... 50
OPERATION
3.7L V-6 .................................... 50
4.7L V-8 .................................... 51
5.7L V-8 .................................... 51
REMOVAL
3.7L V-6 .................................... 52
4.7L V-8 .................................... 52
5.7L V-8 .................................... 53
8.3L - SRT-10 ............................... 53
INSTALLATION
3.7L V-6 .................................... 54
4.7L V-8 .................................... 55
5.7L V-8 .................................... 55
8.3L - SRT-10 ............................... 55
INJECTOR - FUEL
DESCRIPTION ................................ 56
OPERATION
FUEL INJECTOR ............................ 56
PCM OUTPUT .............................. 56
REMOVAL
3.7/4.7/ 5.7L ................................ 57
8.3L - SRT-10 ............................... 57
INSTALLATION
3.7/ 4.7/ 5.7L ............................... 60
8.3L - SRT-10 ............................... 60
RELAY - FUEL PUMP
DESCRIPTION ................................ 61
OPERATION .................................. 61
REMOVAL .................................... 61
INSTALLATION ............................... 61
MOTOR-IAC
DESCRIPTION
3.7L, 4.7L, 5.7L ............................. 62
8.3L - SRT-10 ............................... 63
OPERATION
3.7L V-6/4.7L V-8 ............................ 63
REMOVAL
3.7L V-6 .................................... 644.7L V-8 .................................... 65
5.7L V-8 .................................... 65
8.3L - SRT-10 ............................... 65
INSTALLATION
3.7L V-6 .................................... 66
4.7L V-8 .................................... 66
5.7L V-8 .................................... 66
8.3L - SRT-10 ............................... 67
SENSOR - INLET AIR TEMPERATURE
REMOVAL — 8.3L ............................. 68
INSTALLATION ............................... 68
SENSOR-INTAKE AIR TEMPERATURE
DESCRIPTION
3.7L V-6 .................................... 69
4.7L V-8 .................................... 69
5.7L V-8 .................................... 70
OPERATION .................................. 70
REMOVAL
3.7L V-6 .................................... 71
4.7L V-8 .................................... 72
5.7L V-8 .................................... 73
INSTALLATION
3.7L V-6 .................................... 74
4.7L V-8 .................................... 75
5.7L V-8 .................................... 75
SENSOR-MAP
DESCRIPTION
3.7L V-6 .................................... 76
4.7L V-8 .................................... 76
5.7L V-8 .................................... 77
8.3L - SRT-10 ............................... 77
OPERATION .................................. 77
REMOVAL
3.7L V-6 .................................... 79
4.7L V-8 .................................... 80
5.7L V-8 .................................... 80
8.3 L - SRT-10 .............................. 81
INSTALLATION
3.7L V-6 .................................... 81
4.7L V-8 .................................... 82
5.7L V-8 .................................... 83
8.3L - SRT-10 ............................... 83
SENSOR - OXYGEN
DESCRIPTION ................................ 84
REMOVAL .................................... 84
INSTALLATION ............................... 85
SWITCH-PTO
DESCRIPTION ................................ 86
OPERATION .................................. 86
THROTTLE BODY
DESCRIPTION ................................ 87
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OPERATION .................................. 87
REMOVAL
3.7L V-6 .................................... 87
4.7L V-8 .................................... 88
5.7L V-8 .................................... 88
8.3L - SRT-10 ............................... 90
INSTALLATION
3.7L V-6 .................................... 92
4.7L V-8 .................................... 93
5.7L V-8 .................................... 93
8.3L - SRT-10 ............................... 94
CABLE - THROTTLE CONTROL
REMOVAL .................................... 95
INSTALLATION ............................... 97SENSOR-THROTTLE POSITION
DESCRIPTION
3.7/4.7/5.7L ................................. 98
8.3L - SRT-10 ............................... 98
OPERATION .................................. 99
REMOVAL
3.7L V6 .................................... 99
4.7L V-8 ................................... 100
5.7L V-8 ................................... 100
8.3L - SRT-10 .............................. 100
INSTALLATION
3.7L V-6 ................................... 101
4.7L V-8 ................................... 102
8.3L - SRT-10 .............................. 103
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SENSOR-ACCELERATOR PEDAL POSITION
DESCRIPTION
The Accelerator Pedal Position Sensor (APPS) (1) is
located inside the vehicle.It is attached to the accel-
erator pedal assembly (3). It is used only on 5.7L V-8
gas engines and diesel engines.
OPERATION
The Accelerator Pedal Position Sensor (APPS) provides the Powertrain Control Module (PCM) with two DC voltage
signals which change as the position of the accelerator pedal changes. Oneof the DC voltage signals will be half
the voltage of the other signal.
REMOVAL
CAUTION: Do not attempt to separate or remove the Accelerator Pedal Position Sensor (APPS) from the
accelerator pedal assembly. The APPS is replaced as an assembly along withthe pedal. If sensor is
removed from pedal, its electronic calibration may be destroyed.
1. Disconnect 6–way electrical connector at top of
APPS (2).
2. Remove APPS lower mounting bolt (4) and two
mounting nuts.
3. Remove pedal and APPS assembly from vehicle.
Page 2285 of 5267
INSTALLATION
CAUTION: Do not attempt to separate or remove the Accelerator Pedal Position Sensor (APPS) from the
accelerator pedal assembly. The APPS is replaced as an assembly along withthe pedal. If sensor is
removed from pedal, its electronic calibration may be destroyed.
1. Position pedal and APPS assembly to its mounting
bracket.
2. Connect 6–way electrical connector to top of APPS
(2).
3. Install APPS lower mounting bolt (4) and two
mounting nuts.
4. If necessary, use a Scan Tool to erase any Diag-
nostic Trouble Codes (DTC’s).
Page 2286 of 5267
SENSOR-CRANKSHAFT POSITION
DESCRIPTION
3.7L V-6
The Crankshaft Position (CKP) (2) sensor is mounted
into the right rear side of the cylinder block. It is posi-
tioned and bolted into a machined hole.
4.7L V-8
The Crankshaft Position (CKP) (1) sensor is mounted
into the right rear side of the cylinder block. It is posi-
tioned and bolted into a machined hole.
Page 2287 of 5267
5.7L V-8
The Crankshaft Position (CKP) (4) sensor is mounted
into the right rear side of the cylinder block. It is posi-
tioned and bolted into a machined hole.
OPERATION
3.7L V-6
Engine speed and crankshaft position are provided
through the CKP (Crankshaft Position) sensor. The
sensor generates pulses that are the input sent to the
Powertrain Control Module (PCM). The PCM interprets
the sensor input to determine the crankshaft position.
The PCM then uses this position, along with other
inputs, to determine injector sequence and ignition
timing.
The sensor is a hall effect device combined with an
internal magnet. It is also sensitive to steel within a
certain distance from it.
A tonewheel (targetwheel) (1) is bolted to the engine
crankshaft. This tonewheel has sets of notches (2) at
its outer edge.
The notches cause a pulse to be generated when they
pass under the sensor. The pulses are the input to the
PCM.
Page 2288 of 5267

4.7L V-8
Engine speed and crankshaft position are provided
through the CKP (Crankshaft Position) sensor. The
sensor generates pulses that are the input sent to the
Powertrain Control Module (PCM). The PCM interprets
the sensor input to determine the crankshaft position.
The PCM then uses this position, along with other
inputs, to determine injector sequence and ignition
timing.
The sensor is a hall effect device combined with an
internal magnet. It is also sensitive to steel within a
certain distance from it.
A tonewheel (1) is bolted to the engine crankshaft.
This tonewheel has sets of notches (2) at its outer
edge.
The notches cause a pulse to be generated when they
pass under the sensor. The pulses are the input to the
PCM.
5.7L V-8
Engine speed and crankshaft position are provided
through the CKP (Crankshaft Position) sensor. The
sensor generates pulses that are the input sent to the
Powertrain Control Module (PCM). The PCM interprets
the sensor input to determine the crankshaft position.
The PCM then uses this position, along with other
inputs, to determine injector sequence and ignition
timing.
The sensor is a hall effect device combined with an
internal magnet. It is also sensitive to steel within a
certain distance from it.
A tonewheel is bolted to the engine crankshaft. This
tonewheel has sets of notches (3) at its outer edge.
The notches cause a pulse to be generated when they
pass under the sensor. The pulses are the input to the
PCM.
Page 2289 of 5267
REMOVAL
3.7L V-6
The Crankshaft Position (CKP) sensor is mounted into
the right rear side of the cylinder block. It is positioned
and bolted into a machined hole.
1. Raise vehicle.
2. Disconnect sensor electrical connector.
3. Remove sensor mounting bolt (1).
4. Carefully twist sensor (2) from cylinder block.
5. Check condition of sensor O-ring (3).
4.7L V-8
The Crankshaft Position (CKP) sensor is located at
the right-rear side of the engine cylinder block. It is
positioned and bolted into a machined hole in the
engine block.
1. Raise vehicle.
2. Disconnect CKP electrical connector at sensor.
3. Remove CKP mounting bolt (2).
4. Carefully twist sensor (1) from cylinder block.
5. Remove sensor from vehicle.
6. Check condition of sensor O-ring.