2003 DODGE RAM intake manifold temperature sensor

Refer to Powertrain Diagnostic Procedures for an
electrical operation and complete description of the
intake heaters, including pre-heat and post-heat
cycles.
REMOVAL
The 2 intake manifold air heater relays are located
in the engine compartment. They are attached to a
common bracket. This bracket is attached to the
right battery tray (Fig. 30).
The mounting bracket and both relays are replaced
as an assembly.
(1) Disconnect both negative battery cables at both
batteries.
(2) Disconnect four relay trigger wires at both
relays. Note position of wiring before removing.(3) Lift four rubber shields from all 4 cables.
(4) Remove four nuts at cable connectors. Note
position of wiring before removing.
(5) Remove relay mounting bracket bolts and
remove relay assembly.
INSTALLATION
(1) Install relay assembly to battery tray. Tighten
mounting bolts to 4.5 N´m (40 in. lbs.) torque.
(2) Connect eight electrical connectors to relays.
(3) Connect battery cables to both batteries.
INTAKE AIR TEMPERATURE
SENSOR/MAP SENSOR
DESCRIPTION
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP Sensor is installed into
the top of the intake manifold.
OPERATION
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP Sensor is installed into
the top of the intake manifold with the sensor ele-
ment extending into the air stream.
The IAT portion of the sensor provides an input
voltage to the Engine Control Module (ECM) indicat-
ing intake manifold air temperature. The MAP por-
tion of the sensor provides an input voltage to the
ECM indicating turbocharger boost pressure.
REMOVAL
The combination, dual function Intake Manifold
Air Temperature Sensor/MAP (IAT/MAP) sensor is
installed into the top of the intake manifold (Fig. 31).
(1) Clean area around sensor.
(2) Disconnect electrical connector from IAT/MAP
sensor.
(3) Remove two T-15 Torx headed screws.
(4) Remove sensor from intake manifold.
(5) Check condition of sensor o-ring (Fig. 32).
Fig. 30 INTAKE MANIFOLD AIR HEATER RELAYS
1 - BATTERY
2 - CABLES TO INTAKE HEATERS
3 - RELAY TRIGGER WIRES
4 - INTAKE AIR HEATER RELAYS (2)
DRFUEL INJECTION - DIESEL 14 - 93
INTAKE AIR HEATER RELAY (Continued)

INSTALLATION
(1) Check condition of sensor o-ring.
(2) Clean sensor mounting area at intake manifold
(3) Position sensor into intake manifold.
(4) Install and tighten 2 screws.
(5) Connect electrical connector to sensor.
MAP SENSOR
DESCRIPTION
A combination, dual function Intake Manifold Air
Temperature Sensor/MAP Sensor is used. Refer to
Intake Air Temperature Sensor/MAP Sensor for infor-
mation.
THROTTLE CONTROL CABLE
REMOVAL
Early Diesel Engine
(1) Disconnect both negative battery cables at both
batteries.
(2) From inside vehicle, hold up accelerator pedal.
Remove plastic cable retainer and throttle cable core
wire from upper end of pedal arm (Fig. 33). The plas-
tic cable retainer snaps into pedal arm.
(3) From inside vehicle, remove cable clip (Fig. 33).
(4) Remove cable core wire at pedal arm.
(5) Remove cable housing from dash panel and
pull cable into engine compartment.
(6) Remove cable cover (Fig. 34). Cable cover is
attached with 2 Phillips screws, 2 plastic retention
clips and 2 push tabs (Fig. 34). Remove 2 Phillips
screws and carefully pry out 2 retention clips. After
clip removal, push rearward on front tab, and
upward on lower tab for cover removal.
(7) Using 2 screwdrivers, pry cable connector
socket from throttle lever ball (Fig. 35).Be very
careful not to bend throttle lever arm.
Fig. 31 INTAKE/MAP SENSOR
1 - TOP OF INTAKE MANIFOLD
2 - IAT/MAP SENSOR
3 - ELEC. CONNECTOR
4 - MOUNTING BOLTS (2)
Fig. 32 SENSOR O-RING
1 - IAT/MAP SENSOR
2 - O-RING
14 - 94 FUEL INJECTION - DIESELDR
INTAKE AIR TEMPERATURE SENSOR/MAP SENSOR (Continued)

INDICATOR - DESCRIPTION, UPSHIFT....8J-40
INDICATOR - DESCRIPTION, WAIT-TO-
START .............................8J-42
INDICATOR - DESCRIPTION, WASHER
FLUID..............................8J-42
INDICATOR - DESCRIPTION, WATER-IN-
FUEL..............................8J-43
INDICATOR - DIAGNOSIS AND TESTING,
BRAKE.............................8J-19
INDICATOR - OPERATION, ABS..........8J-17
INDICATOR - OPERATION, AIRBAG.......8J-18
INDICATOR - OPERATION, BRAKE/PARK
BRAKE.............................8J-19
INDICATOR - OPERATION, CARGO LAMP . . 8J-20
INDICATOR - OPERATION, CHECK
GAUGES............................8J-21
INDICATOR - OPERATION, CRUISE.......8J-22
INDICATOR - OPERATION, DOOR AJAR . . . 8J-23
INDICATOR - OPERATION, ETC..........8J-25
INDICATOR - OPERATION, GEAR
SELECTOR..........................8J-27
INDICATOR - OPERATION, HIGH BEAM....8J-28
INDICATOR - OPERATION, LAMP OUT....8J-28
INDICATOR - OPERATION, LOW FUEL.....8J-29
INDICATOR - OPERATION, OVERDRIVE
OFF ...............................8J-33
INDICATOR - OPERATION, SEATBELT.....8J-34
INDICATOR - OPERATION, SECURITY.....8J-35
INDICATOR - OPERATION, SERVICE 4WD . . 8J-36
INDICATOR - OPERATION, TRANS TEMP . . 8J-38
INDICATOR - OPERATION, TURN SIGNAL . . 8J-39
INDICATOR - OPERATION, UPSHIFT......8J-40
INDICATOR - OPERATION, WAIT-TO-
START .............................8J-42
INDICATOR - OPERATION, WASHER
FLUID..............................8J-42
INDICATOR - OPERATION, WATER-IN-
FUEL..............................8J-43
INDICATOR LAMP - DESCRIPTION,
SENTRY KEY IMMOBILIZER SYSTEM......8Q-5
INDICATOR LAMP - OPERATION,
SENTRY KEY IMMOBILIZER SYSTEM......8Q-5
INDICATOR LAMP (MIL) - DESCRIPTION,
MALFUNCTION.......................8J-30
INDICATOR LAMP (MIL) - OPERATION,
MALFUNCTION.......................8J-30
INDICATOR TEST - STANDARD
PROCEDURE, BUILT-IN................8F-10
INDICATORS - DIAGNOSIS AND
TESTING, TREAD WEAR................22-7
INERTIA HINGE COVER - INSTALLATION,
CENTER SEAT BACK..................23-78
INERTIA HINGE COVER - REMOVAL,
CENTER SEAT BACK..................23-78
INFLATION PRESSURES - DESCRIPTION,
TIRE................................22-6
INFO CENTER - DESCRIPTION,
ELECTRONIC VEHICLE.................8M-7
INFO CENTER - INSTALLATION,
ELECTRONIC VEHICLE................8M-10
INFO CENTER - OPERATION,
ELECTRONIC VEHICLE.................8M-8
INFO CENTER - REMOVAL, ELECTRONIC
VEHICLE...........................8M-10
INITIAL OPERATION - STANDARD
PROCEDURE, POWER STEERING
PUMP.............................19-39
INITIALIZATION, STANDARD PROCEDURE
- SENTRY KEY IMMOBILIZER SYSTEM....8Q-3
INJECTION PUMP - DESCRIPTION, FUEL . . 14-64
INJECTION PUMP - INSTALLATION, FUEL . 14-67
INJECTION PUMP - OPERATION, FUEL
....14-64
INJECTION PUMP - REMOVAL, FUEL
.....14-65
INJECTION PUMP TIMING - DIAGNOSIS
AND TESTING, FUEL
..................14-65
INJECTOR - DESCRIPTION, FUEL
. . . 14-32,14-85
INJECTOR - INSTALLATION, FUEL
........14-87
INJECTOR - OPERATION, FUEL
.....14-32,14-86
INJECTOR - REMOVAL, FUEL
...........14-87
INJECTOR FIRING ORDER, DIESEL -
FUEL
..............................14-60
INJECTOR RAIL - DESCRIPTION, FUEL
....14-89
INJECTOR RAIL - INSTALLATION, FUEL
. . . 14-90
INJECTOR RAIL - OPERATION, FUEL
.....14-89
INJECTOR RAIL - REMOVAL, FUEL
.......14-89
INLET AIR TEMPERATURE SENSOR/
PRESSURE SENSOR - DESCRIPTION
.....14-90INLET AIR TEMPERATURE SENSOR/
PRESSURE SENSOR - INSTALLATION.....14-90
INLET AIR TEMPERATURE SENSOR/
PRESSURE SENSOR - OPERATION.......14-90
INLET AIR TEMPERATURE SENSOR/
PRESSURE SENSOR - REMOVAL........14-90
INLET FILTER - INSTALLATION..........14-23
INLET FILTER - REMOVAL..............14-23
INNER BELT MOLDING - INSTALLATION,
FRONT DOOR.......................23-93
INNER BELT MOLDING - INSTALLATION,
REAR DOOR........................23-94
INNER BELT MOLDING - REMOVAL,
FRONT DOOR.......................23-93
INNER BELT MOLDING - REMOVAL,
REAR DOOR........................23-94
INPUT - OPERATION, ASD SENSE - PCM . . . 8I-6
INPUT CLUTCH ASSEMBLY - ASSEMBLY . 21-552
INPUT CLUTCH ASSEMBLY -
DESCRIPTION......................21-549
INPUT CLUTCH ASSEMBLY -
DISASSEMBLY......................21-550
INPUT CLUTCH ASSEMBLY - OPERATION . 21-549
INPUT SHAFT SEAL - INSTALLATION,
STEERING GEAR.....................19-28
INPUT SHAFT SEAL - REMOVAL,
STEERING GEAR.....................19-25
INPUT SPEED SENSOR - DESCRIPTION . . 21-558
INPUT SPEED SENSOR - INSTALLATION . 21-559
INPUT SPEED SENSOR - OPERATION....21-558
INPUT SPEED SENSOR - REMOVAL.......21-559
INSERTS - INSTALLATION, SPRING TIP....2-42
INSERTS - REMOVAL, SPRING TIP........2-41
INSIDE HANDLE ACTUATOR -
INSTALLATION..................23-22,23-32
INSIDE HANDLE ACTUATOR - REMOVAL . . 23-22,
23-31
INSTALLED - INSTALLATION, FRONT OIL
SEAL - FRONT COVER.................9-384
INSTALLED - REMOVAL, FRONT OIL
SEAL - FRONT COVER.................9-384
INSTRUMENT CLUSTER - ASSEMBLY.....8J-15
INSTRUMENT CLUSTER - DESCRIPTION . . . 8J-2
INSTRUMENT CLUSTER - DIAGNOSIS
AND TESTING.......................8J-10
INSTRUMENT CLUSTER - DISASSEMBLY . . 8J-14
INSTRUMENT CLUSTER - INSTALLATION . . 8J-16
INSTRUMENT CLUSTER - OPERATION.....8J-6
INSTRUMENT CLUSTER - REMOVAL.....8J-14
INSTRUMENT PANEL ANTENNA CABLE -
INSTALLATION.......................8A-7
INSTRUMENT PANEL ANTENNA CABLE -
REMOVAL...........................8A-6
INSTRUMENT PANEL ASSEMBLY -
INSTALLATION.......................23-56
INSTRUMENT PANEL ASSEMBLY -
REMOVAL..........................23-53
INSTRUMENT PANEL CENTER BEZEL -
INSTALLATION.......................23-58
INSTRUMENT PANEL CENTER BEZEL -
REMOVAL..........................23-58
INSTRUMENT PANEL DRIVER SIDE
BEZEL - INSTALLATION................23-59
INSTRUMENT PANEL DRIVER SIDE
BEZEL - REMOVAL...................23-58
INSTRUMENT PANEL DUCTS -
INSTALLATION.......................24-29
INSTRUMENT PANEL DUCTS - REMOVAL . 24-29
INSTRUMENT PANEL HEADLAMP
SWITCH BEZEL - INSTALLATION.........23-57
INSTRUMENT PANEL HEADLAMP
SWITCH BEZEL - REMOVAL............23-57
INSTRUMENT PANEL LOWER
SURROUND - INSTALLATION...........23-60
INSTRUMENT PANEL LOWER
SURROUND - REMOVAL...............23-60
INSTRUMENT PANEL TOP COVER -
INSTALLATION.......................23-60
INSTRUMENT PANEL TOP COVER -
REMOVAL..........................23-59
INTAKE AIR HEATER - DESCRIPTION.....14-91
INTAKE AIR HEATER - INSTALLATION
.....14-91
INTAKE AIR HEATER - OPERATION
.......14-91
INTAKE AIR HEATER - REMOVAL
........14-91
INTAKE AIR HEATER RELAY -
DESCRIPTION
.......................14-92
INTAKE AIR HEATER RELAY -
INSTALLATION
.......................14-93INTAKE AIR HEATER RELAY -
OPERATION.........................14-92
INTAKE AIR HEATER RELAY - REMOVAL . . 14-93
INTAKE AIR TEMPERATURE SENSOR -
DESCRIPTION.......................14-36
INTAKE AIR TEMPERATURE SENSOR -
INSTALLATION.......................14-38
INTAKE AIR TEMPERATURE SENSOR -
OPERATION.........................14-36
INTAKE AIR TEMPERATURE SENSOR -
REMOVAL..........................14-36
INTAKE AIR TEMPERATURE SENSOR/
MAP SENSOR - DESCRIPTION..........14-93
INTAKE AIR TEMPERATURE SENSOR/
MAP SENSOR - INSTALLATION..........14-94
INTAKE AIR TEMPERATURE SENSOR/
MAP SENSOR - OPERATION............14-93
INTAKE AIR TEMPERATURE SENSOR/
MAP SENSOR - REMOVAL.............14-93
INTAKE MANIFOLD - CLEANING....9-158,9-219,
9-275,9-346,9-402
INTAKE MANIFOLD - DESCRIPTION . 9-157,9-219,
9-274,9-401,9-71
INTAKE MANIFOLD - INSPECTION . . 9-158,9-219,
9-275,9-346,9-402
INTAKE MANIFOLD - INSTALLATION.....9-158,
9-219,9-275,9-346,9-402,9-72
INTAKE MANIFOLD - OPERATION........9-274
INTAKE MANIFOLD - REMOVAL....9-157,9-219,
9-275,9-345,9-401,9-72
INTAKE MANIFOLD LEAKAGE -
DIAGNOSIS AND TESTING . . . 9-157,9-219,9-274,
9-401
INTAKE MANIFOLD LEAKS - DIAGNOSIS
AND TESTING........................9-71
INTAKE SYSTEM - INSTALLATION, AIR....9-194
INTAKE SYSTEM - REMOVAL, AIR.......9-194
INTAKE/EXHAUST VALVES & SEATS -
CLEANING..........................9-248
INTAKE/EXHAUST VALVES & SEATS -
DESCRIPTION....9-122,9-246,9-27,9-305,9-375
INTAKE/EXHAUST VALVES & SEATS -
INSPECTION........................9-248
INTAKE/EXHAUST VALVES & SEATS -
INSTALLATION..............9-123,9-248,9-29
INTAKE/EXHAUST VALVES & SEATS -
REMOVAL.................9-122,9-248,9-28
INTEGRATED POWER MODULE -
DESCRIPTION.....................8W-97-3
INTEGRATED POWER MODULE -
INSTALLATION....................8W-97-4
INTEGRATED POWER MODULE -
OPERATION.......................8W-97-3
INTEGRATED POWER MODULE -
REMOVAL........................8W-97-3
INTERIOR - CAUTION.................23-63
INTERLOCK - ADJUSTMENTS, BRAKE
TRANSMISSION SHIFT . . . 21-195,21-376,21-540
INTERLOCK - DIAGNOSIS AND TESTING,
BRAKE TRANSMISSION SHIFT . . . 21-195,21-375,
21-540
INTERLOCK SYSTEM - DESCRIPTION,
BRAKE TRANSMISSION SHIFT . . . 21-194,21-375,
21-540
INTERLOCK SYSTEM - OPERATION,
BRAKE TRANSMISSION SHIFT . . . 21-194,21-375,
21-540
INTERNATIONAL SYMBOLS -
DESCRIPTION......................Intro.-6
INTERNATIONAL SYMBOLS -
DESCRIPTION.........................0-1
INTRODUCTION - DIAGNOSIS AND
TESTING, ENGINE DIAGNOSIS.....9-178,9-225,
9-353,9-4,9-93
INVERTED FLARING - STANDARD
PROCEDURE, DOUBLE..................5-7
IOD FUSE - DESCRIPTION...........8W-97-6
IOD FUSE - INSTALLATION...........8W-97-7
IOD FUSE - OPERATION.............8W-97-6
IOD FUSE - REMOVAL..............8W-97-6
ISO FLARING - STANDARD PROCEDURE....5-7
ISOLATORS - INSTALLATION, BODY
......23-37
ISOLATORS - REMOVAL, BODY
.........23-36
JOINT - DIAGNOSIS AND TESTING,
LOWER BALL
........................2-18
JOINT - DIAGNOSIS AND TESTING,
UPPER BALL
.........................2-26
JOINT - INSTALLATION, LOWER BALL
. 2-19,2-33
18 INDEXDR
Description Group-Page Description Group-Page Description Group-Page