DODGE RAM SRT-10 2006 Service Repair Manual

identical conditions, the PCM recalls that 125 steps were required to maintain the target. This program allows for
greater customer satisfaction due to greater control of engine idle.
Another function of the memory program, which occurs when the power steering switch (if equipped), or the A/C
request circuit, requires that the IAC stepper motor control engine rpm, is the recording of the last targeted steps
into the memory cell. The PCM can anticipate A/C compressor loads. This is accomplished by delaying compressor
operation for approximately 0.5 seconds until the PCM moves the IAC stepper motor to the recorded steps that
were loaded into the memory cell. Using this program helps eliminate idle-quality changes as loads change. Finally,
the PCM incorporates a
No-Loadengine speed limiter of approximately 1800 - 2000 rpm, when it recognizes that
the TPS is indicating an idle signal and IAC motor cannot maintain engine idle.
A (factory adjusted) set screw is usedto mechanically limit the position of the throttle body throttle plate.Never
attempt to adjust the engine idle speed using this screw.All idle speed functions are controlled by the IAC
motor through the PCM.
REMOVAL
3.7L V-6
The Idle Air Control (IAC) motor (3) is located on the
side of the throttle body.
1. Remove air resonator box at throttle body.
2. Disconnect electrical connector from IAC motor.
3. Remove two mounting bolts (screws) (4).
4. Remove IAC motor from throttle body.

4.7L V-8
The Idle Air Control (IAC) motor (3) is located on the
side of the throttle body.
1. Remove air resonator box at throttle body.
2. Disconnect electrical connector from IAC motor.
3. Remove two mounting bolts (screws).
4. Remove IAC motor from throttle body.
5.7L V-8
The IAC motor is not serviceable on the 5.7L V-8 engine.
8.3L - SRT-10
The IAC motor is inserted into a housing at the front of the intake manifold.The IAC motor and housing are ser-
viced together.
1. Remove housing to manifold screws. Remove IAC motor and housing.
2. Disconnect the electrical connector from IAC motor.

INSTALLATION
3.7L V-6
The Idle Air Control (IAC) motor (3) is located on the
side of the throttle body.
1. Install IAC motor to throttle body.
2. Install and tighten two mounting bolts (screws) to 7
Nꞏm (60 in. lbs.) torque.
3. Install electrical connector.
4. Install air resonator to throttle body.
4.7L V-8
The Idle Air Control (IAC) motor (3) is located on the
side of the throttle body.
1. Install IAC motor to throttle body.
2. Install and tighten two mounting bolts (screws) to 7
Nꞏm (60 in. lbs.) torque.
3. Install electrical connector.
4. Install air resonator to throttle body.
5.7L V-8
The IAC motor is not serviceable on the 5.7L V-8 engine.

8.3L - SRT-10
The IAC motor is inserted into a housing at the front of the intake manifold.The IAC motor and housing are ser-
viced together.
1. Attach electrical connector to IAC motor.
2. Install IAC motor into and housing on manifold. Tighten mounting screwsto 4 Nꞏm (35 in. lbs.) torque.

SENSOR - INLET AIR TEMPERATURE
REMOVAL — 8.3L
NOTE: Take care not to damage the thermister pill
when removing the sensor.
1. Remove the battery cover and disconnect the neg-
ative battery cable.
2. Disconnect the electrical connector from the inlet
temperature sensor.
3. Remove sensor from inlet hose.
INSTALLATION
NOTE: Take care not to damage the open ther-
mister pill when installing the sensor.
1. Install sensor , use a little water to aid in insertion
of sensor.
2. Make sure that the rib on the sensor matches up
with the rib on the inlet hose. The thermister pill
shouldbeindirectcontactwiththeinletairstream.
3. Connect the electrical connector.
4. Connect the negative battery cable and install bat-
tery cover.

SENSOR-INTAKE AIR TEMPERATURE
DESCRIPTION
3.7L V-6
The 2-wire Intake Manifold Air Temperature (IAT) sen-
sor (1) is installed in the intake manifold with the sen-
sor element extending into the air stream.
The IAT sensor is a two-wire Negative Thermal Coef-
ficient (NTC) sensor. Meaning, as intake manifold tem-
perature increases, resistance (voltage) in the sensor
decreases. As temperature decreases, resistance
(voltage) in the sensor increases.
4.7L V-8
The 2-wire Intake Manifold Air Temperature (IAT) sen-
sor (3) is installed in the intake manifold with the sen-
sor element extending into the air stream.
The IAT sensor is a two-wire Negative Thermal Coef-
ficient (NTC) sensor. Meaning, as intake manifold tem-
perature increases, resistance (voltage) in the sensor
decreases. As temperature decreases, resistance
(voltage) in the sensor increases.

5.7L V-8
The 2-wire Intake Manifold Air Temperature (IAT) sen-
sor is installed in the intake manifold (2) with the sen-
sor element extending into the air stream.
The IAT sensor is a two-wire Negative Thermal Coef-
ficient (NTC) sensor. Meaning, as intake manifold tem-
perature increases, resistance (voltage) in the sensor
decreases. As temperature decreases, resistance
(voltage) in the sensor increases.
OPERATION
The IAT sensor provides an input voltage to the Powertrain Control Module (PCM) indicating the density of the air
entering the intake manifold based upon intake manifold temperature. At key-on, a 5–volt power circuit is supplied
to the sensor from the PCM. The sensor is grounded at the PCM through a low-noise, sensor-return circuit.
The PCM uses this input to calculate the following:
Injector pulse-width
Adjustment of spark timing (to help prevent spark knock with high intake manifold air-charge temperatures)
The resistance values of the IAT sensor is the same as for the Engine CoolantTemperature (ECT) sensor.

REMOVAL
3.7L V-6
The intake manifold air temperature (IAT) sensor is
installed into the left side of intake manifold plenum.
1. Disconnect electrical connector from IAT sensor.
2. Clean dirt from intake manifold at sensor base.
3. Gently lift on small plastic release tab (3) and
rotate sensor about 1/4 turn counterclockwise for
removal.
4. Check condition of sensor O-ring.

4.7L V-8
The intake manifold air temperature (IAT) sensor (3) is
installed into the left side of intake manifold plenum.
1. Disconnect electrical connector from IAT sensor.
2. Clean dirt from intake manifold at sensor base.
3. Gently lift on small plastic release tab (3) and
rotate sensor about 1/4 turn counterclockwise for
removal.
4. Check condition of sensor O-ring.

5.7L V-8
The intake manifold air temperature (IAT) sensor (2) is
installed into the front of the intake manifold air box
plenum.
1. Disconnect electrical connector (2) from IAT sensor.
2. Clean dirt from intake manifold at sensor base.