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INSTALLATION
1. Install relay assembly (4) to battery tray. Tighten
mounting bolts to 4.5 Nꞏm (40 in. lbs.) torque.
2. Connect eight electrical connectors to relays.
3. Connect battery cables to both batteries.
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SENSOR-TEMPERATURE/PRESSURE-MAP
DESCRIPTION
The combination, dual function Intake Manifold Air
Temperature Sensor/MAP Sensor (2) 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 element extending into the air stream.
The IAT portion of the sensor provides an input voltage to the Engine Control Module (ECM) indicating intake man-
ifold air temperature. The MAP portion 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 (2) into the top of the intake manifold.
1. Clean area around sensor.
2. Disconnect electrical connector (3) from IAT/MAP
sensor.
3. Remove two T-15 Torx headed screws (4).
4. Remove sensor from intake manifold.
Page 2403 of 5267
5. Check condition of sensor O-ring (2).
INSTALLATION
1. Check condition of sensor o-ring.
2. Lubricate sensor o-ring and sensor hole in intake
manifold cover with clean engine oil.
3. Clean sensor mounting area at intake manifold (1).
4. Position sensor (2) into intake manifold.
5. Install and tighten 2 sensor mounting screws to 1
Nꞏm (9 in. lbs.) torque.
6. Connect electrical connector to sensor.
Page 2404 of 5267
SENSOR-MAP
DESCRIPTION
A combination, dual function Intake Manifold Air Temperature Sensor/MAPSensor is used. Refer to Intake Air Tem-
perature Sensor/MAP Sensor for information.
Page 2405 of 5267
SWITCH - PTO
DESCRIPTION
This Engine Control Module (ECM) input is used only on models equipped withaftermarket Power Take Off (PTO)
units.
OPERATION
This input is used only to tell the ECM that the aftermarket PTO (Power Take Off) unit has been engaged. The ECM
will disable (temporarily shut down) certain OBD II diagnostic trouble codes when the PTO unit is engaged.
Page 2406 of 5267
STEERING
TABLE OF CONTENTS
page page
STEERING
DESCRIPTION ................................. 2
OPERATION ................................... 2
DIAGNOSIS AND TESTING
POWER STEERING SYSTEM ................. 2
POWER STEERING FLOW AND PRESSURE . . . 4
SPECIAL TOOLS
STEERING .................................. 6COLUMN...............................7
GEAR - INDEPENDENT FRONT SUSPENSION..38
GEAR - LINK/COIL.......................43
LINKAGE - INDEPENDENT FRONT
SUSPENSION...........................62
LINKAGE - LINK/COIL....................66
PUMP.................................76
PUMP - SRT10..........................92
Page 2407 of 5267

STEERING
DESCRIPTION
CAUTION: MOPARATF+4 is to be used in the power steering system. No other power steering or auto-
matic transmission fluid is to be used in the system. Damage may result to the power steering pump and
system if any other fluid is used, and do not overfill.
Power steering systems consist of:
Steering column
Rack and pinion steering gear
Belt driven hydraulic steering pump
Pump pressure and return hoses
Oil Cooler
OPERATION
The steering column shaft isattached to the gear pin-
ion. The rotation of the pinion moves the gear rack
from side-to-side. This lateral action of the rack
pushes and pulls the tie rods (4) to change the direc-
tion of the front wheels.
Power assist is provided by an engine mounted
hydraulic pump which supplies hydraulic fluid pressure
to the steering gear (6).
DIAGNOSIS AND TESTING
POWER STEERING SYSTEM
STEERING NOISE
CONDITION POSSIBLE CAUSES CORRECTION
OBJECTIONAL HISS OR
WHISTLE1. Steering intermediate shaft to dash panel
seal.1. Check and repair seal at dash
panel.
2. Noisy valve in power steering gear. 2. Replace steering gear.
Page 2408 of 5267

CONDITION POSSIBLE CAUSES CORRECTION
RATTLE OR CLUNK 1. Gear mounting bolts loose. 1. Tighten bolts to specification.
2. Loose or damaged suspension
components.2. Inspect and repair suspension.
3. Internal gear noise. 3. Replace steering gear.
4. Pressure hose in contact with other
components.4. Reposition hose.
5. Loose or damaged intermediate shaft or
column.5. Inspect and repair or replace.
CHIRP OR SQUEAL 1. Loose belt. 1. Adjust or replace.
WHINE OR GROWL 1. Low fluid level. 1. Fill to proper level.
2. Pressure hose in contact with other
components.2. Reposition hose.
3. Internal pump noise. 3. Replace pump.
4. Air in fluid 4. Check for leaks, Evacuate air
from P/S system.
SUCKING AIR SOUND 1. Loose return line clamp. 1. Replace clamp.
2. O-ring missing or damaged on hose
fitting.2. Replace o-ring.
3. Low fluid level. 3. Fill to proper level.
4. Air leak between pump and reservoir. 4. Repair as necessary.
5. Reservoir cap not installed correctly. 5. Install reservoir cap correctly.
SCRUBBING OR
KNOCKING1. Wrong tire size. 1. Verify tire size.
BINDING AND STICKING
CONDITION POSSIBLE CAUSE CORRECTION
DIFFICULT TO TURN WHEEL
STICKS OR BINDS1. Low fluid level. 1. Fill to proper level.
2. Tire pressure. 2. Adjust tire pressure.
3. Steering components (ball
joints/tie rod ends).3 Inspect and repair as necessary.
4. Loose belt. 4. Adjust or replace.
5. Low pump pressure. 5. Pressure test and replace if
necessary.
6. Column shaft coupler binding. 6. Replace coupler.
7. Steering gear worn. 7. Replace gear.
8. Pump seized / Stuck valve 8. Replace pump.