2005 CHRYSLER CARAVAN oil pressure

DISCONNECTION/CONNECTION
(1) Perform fuel pressure release procedure. Refer
to Fuel Pressure Release Procedure in this section.
(2) Disconnect negative battery cable from battery
or auxiliary jumper terminal.
(3) Clean fitting of any foreign material before dis-
assembly.
(4) To release fuel system component from quick-
connect fitting, firmly push fitting towards compo-
nent being serviced while firmly pushing plastic
retainer ring into fitting (Fig. 38). With plastic ring
depressed, pull fitting from component.The plastic
retainer ring must be pressed squarely into fit-
ting body. If this retainer is cocked during
removal, it may be difficult to disconnect fit-
ting. Use an open-end wrench on shoulder of
plastic retainer ring to aid in disconnection.(5) After disconnection, plastic retainer ring will
remain with quick-connect fitting connector body.
(6) Inspect fitting connector body, plastic retainer
ring and fuel system component for damage. Replace
as necessary.
(7) Prior to connecting quick-connect fitting to
component being serviced, check condition of fitting
and component. Clean parts with a lint-free cloth.
Lubricate with clean engine oil.
(8) Insert quick-connect fitting into component
being serviced until a click is felt.
(9) Verify a locked condition by firmly push-pull-
ing-push on fuel tube and fitting (15-30 lbs.).
(10) Connect negative battery cable to battery or
auxiliary jumper terminal.
(11) Use the DRB IIItscan tool ASD Fuel System
Test to pressurize the fuel system. Check for leaks.
14 - 20 FUEL DELIVERYRS
QUICK CONNECT FITTING (Continued)

1 second. Therefore, battery voltage is not supplied to
the fuel pump, ignition coil, fuel injectors and heated
oxygen sensors.
ENGINE START-UP MODE
This is an OPEN LOOP mode. If the vehicle is in
park or neutral (automatic transaxles) or the clutch
pedal is depressed (manual transaxles) the ignition
switch energizes the starter relay when the engine is
not running. The following actions occur when the
starter motor is engaged.
²If the PCM receives the camshaft position sensor
and crankshaft position sensor signals, it energizes
the Auto Shutdown (ASD) relay and fuel pump relay.
If the PCM does not receive both signals within
approximately one second, it will not energize the
ASD relay and fuel pump relay. The ASD and fuel
pump relays supply battery voltage to the fuel pump,
fuel injectors, ignition coil, (EGR solenoid and PCV
heater if equipped) and heated oxygen sensors.
²The PCM energizes the injectors (on the 69É
degree falling edge) for a calculated pulse width until
it determines crankshaft position from the camshaft
position sensor and crankshaft position sensor sig-
nals. The PCM determines crankshaft position within
1 engine revolution.
²After determining crankshaft position, the PCM
begins energizing the injectors in sequence. It adjusts
injector pulse width and controls injector synchroni-
zation by turning the individual ground paths to the
injectors On and Off.
²When the engine idles within  64 RPM of its
target RPM, the PCM compares current MAP sensor
value with the atmospheric pressure value received
during the Ignition Switch On (zero RPM) mode.
Once the ASD and fuel pump relays have been
energized, the PCM determines injector pulse width
based on the following:
²MAP
²Engine RPM
²Battery voltage
²Engine coolant temperature
²Inlet/Intake air temperature (IAT)
²Throttle position
²The number of engine revolutions since cranking
was initiated
During Start-up the PCM maintains ignition tim-
ing at 9É BTDC.
ENGINE WARM-UP MODE
This is an OPEN LOOP mode. The following inputs
are received by the PCM:
²Manifold Absolute Pressure (MAP)
²Crankshaft position (engine speed)
²Engine coolant temperature
²Inlet/Intake air temperature (IAT)²Camshaft position
²Knock sensor
²Throttle position
²A/C switch status
²Battery voltage
²Vehicle speed
²Speed control
²O2 sensors
The PCM adjusts injector pulse width and controls
injector synchronization by turning the individual
ground paths to the injectors On and Off.
The PCM adjusts ignition timing and engine idle
speed. Engine idle speed is adjusted through the idle
air control motor.
CRUISE OR IDLE MODE
When the engine is at operating temperature this
is a CLOSED LOOP mode. During cruising or idle
the following inputs are received by the PCM:
²Manifold absolute pressure
²Crankshaft position (engine speed)
²Inlet/Intake air temperature
²Engine coolant temperature
²Camshaft position
²Knock sensor
²Throttle position
²Exhaust gas oxygen content (O2 sensors)
²A/C switch status
²Battery voltage
²Vehicle speed
The PCM adjusts injector pulse width and controls
injector synchronization by turning the individual
ground paths to the injectors On and Off.
The PCM adjusts engine idle speed and ignition
timing. The PCM adjusts the air/fuel ratio according
to the oxygen content in the exhaust gas (measured
by the upstream and downstream heated oxygen sen-
sor).
The PCM monitors for engine misfire. During
active misfire and depending on the severity, the
PCM either continuously illuminates or flashes the
malfunction indicator lamp (Check Engine light on
instrument panel). Also, the PCM stores an engine
misfire DTC in memory, if 2nd trip with fault.
The PCM performs several diagnostic routines.
They include:
²Oxygen sensor monitor
²Downstream heated oxygen sensor diagnostics
during open loop operation (except for shorted)
²Fuel system monitor
²EGR monitor (if equipped)
²Purge system monitor
²Catalyst efficiency monitor
²All inputs monitored for proper voltage range,
rationality.
RSFUEL INJECTION14-23
FUEL INJECTION (Continued)

IDLE AIR CONTROL MOTOR
DESCRIPTION
The idle air control valve is mounted on the throt-
tle body. The PCM operates the idle air control valve
(Fig. 15) or (Fig. 16).
OPERATION
The PCM adjusts engine idle speed through the
idle air control valve to compensate for engine load,
coolant temperature or barometric pressure changes.The throttle body has an air bypass passage that
provides air for the engine during closed throttle idle.
The idle air control valve regulates air flow through
the bypass passage.
The PCM controls engine idle speed by adjusting
the position of the idle air control valve. The adjust-
ments are based on inputs the PCM receives. The
inputs are from the throttle position sensor, crank-
shaft position sensor, coolant temperature sensor,
MAP sensor, vehicle speed sensor and various switch
operations (brake, park/neutral, air conditioning).
When engine rpm is above idle speed, the IAC is
used for the following functions:
²Off-idle dashpot
²Deceleration air flow control
²A/C compressor load control (also opens the pas-
sage slightly before the compressor is engaged so
that the engine rpm does not dip down when the
compressor engages)
Target Idle
Target idle is determined by the following inputs:
²Gear position
²ECT Sensor
²Battery voltage
²Ambient/Battery Temperature Sensor
²VSS
²TPS
²MAP Sensor
REMOVAL
When servicing throttle body components, always
reassemble components with new O-rings and seals
where applicable. If assembly of component is diffi-
cult, a light coat of engine oil may be applied to the
O-RINGS ONLY to aid assembly. Use care when
removing hoses to prevent damage to hose or hose
nipple.
(1) Disconnect negative cable from battery.
(2) Remove electrical connector from idle air con-
trol valve (Fig. 17).
(3) Remove idle air control valve mounting screw.
(4) Remove valve from throttle body. Ensure the
O-rings is removed with the valve.
INSTALLATION
When servicing throttle body components, always
reassemble components with new O-rings and seals
where applicable. If assembly of component is diffi-
cult,a light coat of engine oil may be applied to
the O-RINGS ONLY (Fig. 18)to aid assembly. Use
care when removing hoses to prevent damage to hose
or hose nipple.
(1) Carefully place idle air control motor into
throttle body.
Fig. 15 TPS/IAC 2.4L
1 - Idle Air Control Valve
2 - Throttle Position Sensor
Fig. 16 TPS/IAC 3.3/3.8L
1 - Idle Air Control Valve
2 - Throttle Position Sensor
RSFUEL INJECTION14-33

GEAR
TABLE OF CONTENTS
page page
GEAR
DESCRIPTION.........................26
OPERATION...........................26
WARNING
WARNINGS AND CAUTIONS.............26
REMOVAL
REMOVAL - LHD GEAR.................26
REMOVAL - RHD GEAR................29INSTALLATION
INSTALLATION - LHD GEAR.............31
INSTALLATION - RHD GEAR.............33
SPECIAL TOOLS
POWER STEERING GEAR..............34
OUTER TIE ROD
REMOVAL.............................34
INSTALLATION.........................35
GEAR
DESCRIPTION
This vehicle is equipped with a rack and pinion
power steering gear (Fig. 1). It is mounted to the
underside of the front suspension cradle/crossmem-
ber.
The steering column is attached to the gear
through the use of an intermediate shaft and cou-
plers. The outer ends of the power steering gear's
outer tie rods connect to the steering knuckles.
NOTE: The power steering gear should NOT be ser-
viced or adjusted unless DaimlerChrysler Corpora-
tion authorizes. If a malfunction or oil leak occurs,
the complete steering gear should be replaced.
Only the outer tie rods may be replaced separately
from the rest of the gear.
OPERATION
Turning of the steering wheel is converted into lin-
ear (side-to-side) travel through the meshing of the
helical pinion teeth with the rack teeth in the steer-
ing gear. This travel pushes and pulls the tie rods to
change the direction of the vehicle's front wheels.
Power assist steering provided by the power steer-
ing pump is controlled by an open center, rotary type
control valve which directs oil from the pump to
either side of the integral rack piston upon demand.
Road feel is controlled by the diameter of a torsion
bar which initially steers the vehicle. As required
steering effort increases, as in a turn, the torsion bar
twists, causing relative rotary motion between the
rotary valve body and the valve spool. This move-
ment directs oil behind the integral rack piston
which, in turn, builds hydraulic pressure and assists
in the turning effort.Manual steering control of the vehicle can be main-
tained if power steering assist is lost. However,
under this condition, steering effort is significantly
increased.
WARNING
WARNINGS AND CAUTIONS
WARNING: POWER STEERING FLUID, ENGINE
PARTS AND EXHAUST SYSTEM MAY BE
EXTREMELY HOT IF ENGINE HAS BEEN RUNNING.
DO NOT START ENGINE WITH ANY LOOSE OR DIS-
CONNECTED HOSES. DO NOT ALLOW HOSES TO
TOUCH HOT EXHAUST MANIFOLD OR CATALYST.
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH THE ENGINE OFF TO PREVENT PERSONAL
INJURY FROM MOVING PARTS.
CAUTION: When the system is open, cap all open
ends of the hoses, power steering pump fittings or
power steering gear ports to prevent entry of for-
eign material into the components.
REMOVAL
REMOVAL - LHD GEAR
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much fluid as
possible from the power steering fluid reservoir.Use
care not to damage the filter mesh below the
fluid surface.
19 - 26 GEARRS

HOSE - POWER STEERING
PRESSURE
REMOVAL
REMOVAL - 2.4L ENGINE
NOTE: Before proceeding, review all WARNINGS
and CAUTIONS. (Refer to 19 - STEERING/PUMP -
WARNING)(Refer to 19 - STEERING/PUMP - CAU-
TION)
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from power steering fluid
reservoir.
(3) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(4) Remove front emissions vapor canister. (Refer
to 25 - EMISSIONS CONTROL/EVAPORATIVE
EMISSIONS/VAPOR CANISTER - REMOVAL)
(5) Place an oil drain pan under vehicle to catch
power steering fluid.
(6) Back out pressure hose tube nut at power
steering pump pressure fitting and remove hose from
pump (Fig. 20).
(7) Remove bolt attaching right routing clamp to
front suspension cradle crossmember (Fig. 20).
Remove pressure hose from clamp.
(8) Back out pressure hose tube nut at power
steering gear and remove hose from gear (Fig. 20).
(9) Remove power steering fluid pressure hose
from vehicle.
REMOVAL - 3.3L/3.8L ENGINE
NOTE: Before proceeding, review all WARNINGS
and CAUTIONS. (Refer to 19 - STEERING/PUMP -
WARNING)(Refer to 19 - STEERING/PUMP - CAU-
TION)
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from power steering fluid
reservoir.(3) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(4) Remove front emissions vapor canister. (Refer
to 25 - EMISSIONS CONTROL/EVAPORATIVE
EMISSIONS/VAPOR CANISTER - REMOVAL)
(5) Remove two bolts securing pressure hose rout-
ing clamps to suspension cradle crossmember and
steel reinforcement (Fig. 21).
(6) Place an oil drain pan under vehicle to catch
draining power steering fluid.
(7) Disconnect pressure hose at power steering
gear (Fig. 21).
Fig. 20 PRESSURE AND RETURN HOSES - 2.4L
1 - POWER STEERING PUMP
2 - RETURN HOSE (HEAT SLEEVE COVERED)
3 - ROUTING CLAMPS
4 - PRESSURE HOSE TUBE NUT
5 - RETURN HOSE TUBE NUT
6 - CRADLE CROSSMEMBER
7 - POWER STEERING GEAR
8 - PRESSURE HOSE
19 - 46 PUMPRS

(3) Install new O-rings on ends of power steering
fluid pressure hose. Lubricate O-rings using clean
power steering fluid.
CAUTION: Use care not to bend tube ends of the
power steering hoses when installing. Leaks and
restrictions may occur.
CAUTION: Power steering fluid hoses must remain
away from the exhaust system and must not come
in contact with any unfriendly surfaces on the vehi-
cle.
(4) Route hose up behind engine toward pump
avoiding tight bends or kinking.
(5) Install power steering pressure hose end into
pump pressure outlet fitting (Fig. 22). Thread tube
nut into outlet fitting, but do not tighten at this time.
(6) Attach pressure hose routing bracket to engine
(Fig. 22). Tighten bolt to 23 N´m (200 in. lbs.) torque.
(7) Tighten hose tube nut at pump outlet fitting to
31 N´m (275 in. lbs.) torque.
(8) Route hose behind cradle crossmember and
start hose end into gear port. Do not tighten hose
tube nut at this time.
(9) Attach hose to suspension cradle crossmember
and steel reinforcement using two routing clamps
and bolts (Fig. 21). Tighten clamp bolt at steel rein-
forcement to 11 N´m (100 in. lbs.) torque. Tighten
clamp bolt at cradle crossmember to 23 N´m (200 in.
lbs.) torque.
(10) Tighten hose tube nut at power steering gear
port to 31 N´m (275 in. lbs.) torque.
(11) Install front emissions vapor canister. (Refer
to 25 - EMISSIONS CONTROL/EVAPORATIVE
EMISSIONS/VAPOR CANISTER - INSTALLATION)
(12) Lower vehicle.
(13) Fill and bleed the power steering system
using the Power Steering Pump Initial Operation
Procedure. (Refer to 19 - STEERING/PUMP - STAN-
DARD PROCEDURE)
(14) Inspect system for leaks.
HOSE - POWER STEERING
RETURN
REMOVAL
REMOVAL - 2.4L ENGINE
NOTE: Before proceeding, review all WARNINGS
and CAUTIONS. (Refer to 19 - STEERING/PUMP -
WARNING)(Refer to 19 - STEERING/PUMP - CAU-
TION)(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from power steering fluid
reservoir.
(3) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(4) Remove front emissions vapor canister. (Refer
to 25 - EMISSIONS CONTROL/EVAPORATIVE
EMISSIONS/VAPOR CANISTER - REMOVAL)
(5) Place an oil drain pan under vehicle to catch
power steering fluid.
(6) Cut tie-strap securing insulating heat sleeve to
power steering fluid return hose near power steering
pump. Pull back heat sleeve to expose hose clamp.
(7) Remove clamp, then return hose from power
steering pump (Fig. 20).
(8) Remove 2 bolts attaching power steering cooler
to cradle crossmember reinforcement (Fig. 24).
(9) Remove bolts attaching routing clamps to front
suspension cradle crossmember (Fig. 20). Remove
return hose from clamps.
(10) Back out return hose tube nut at power steer-
ing gear and remove hose (Fig. 20).
REMOVAL - 3.3L/3.8L ENGINE
NOTE: Before proceeding, review all WARNINGS
and CAUTIONS. (Refer to 19 - STEERING/PUMP -
WARNING)(Refer to 19 - STEERING/PUMP - CAU-
TION)
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much power
steering fluid as possible from power steering fluid
reservoir.
(3) Place an oil drain pan under vehicle to catch
any draining power steering fluid.
(4) Remove clamp attaching return hose to power
steering fluid reservoir. Disconnect hose from reser-
voir (Fig. 22).
(5) Follow return hose downward and open
retainer at ABS bracket (Fig. 21). Remove hose tube
from retainer.
(6) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(7) Remove front emissions vapor canister. (Refer
to 25 - EMISSIONS CONTROL/EVAPORATIVE
EMISSIONS/VAPOR CANISTER - REMOVAL)
(8) Remove bolt securing return hose routing
clamp to suspension cradle crossmember (Fig. 21).
RSPUMP19-49
HOSE - POWER STEERING PRESSURE (Continued)

TRANSMISSION/TRANSAXLE
TABLE OF CONTENTS
page page
40TE AUTOMATIC TRANSAXLE..............141TE AUTOMATIC TRANSAXLE............146
40TE AUTOMATIC TRANSAXLE
TABLE OF CONTENTS
page page
40TE AUTOMATIC TRANSAXLE
DESCRIPTION..........................2
OPERATION............................4
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - 4XTE
TRANSAXLE GENERAL DIAGNOSIS........5
DIAGNOSIS AND TESTING - ROAD TEST....5
DIAGNOSIS AND TESTING - HYDRAULIC
PRESSURE TESTS.....................6
DIAGNOSIS AND TESTING - CLUTCH AIR
PRESSURE TESTS.....................8
DIAGNOSIS AND TESTING - TORQUE
CONVERTER HOUSING FLUID LEAKAGE....9
REMOVAL.............................9
DISASSEMBLY.........................12
ASSEMBLY............................29
INSTALLATION.........................51
SCHEMATICS AND DIAGRAMS
4XTE TRANSAXLE HYDRAULIC
SCHEMATICS........................54
SPECIFICATIONS - 41TE TRANSAXLE.......66
SPECIAL TOOLS.......................68
ACCUMULATOR
DESCRIPTION.........................73
OPERATION...........................73
DRIVING CLUTCHES
DESCRIPTION.........................74
OPERATION...........................74
FINAL DRIVE
DESCRIPTION.........................74
OPERATION...........................75
DISASSEMBLY.........................75
ASSEMBLY............................78
ADJUSTMENTS
DIFFERENTIAL BEARING PRELOAD
MEASUREMENT AND ADJUSTMENT......79FLUID
STANDARD PROCEDURE
FLUID LEVEL AND CONDITION CHECK....82
STANDARD PROCEDURE - FLUID AND
FILTER SERVICE......................82
GEAR SHIFT CABLE
REMOVAL.............................84
HOLDING CLUTCHES
DESCRIPTION.........................86
OPERATION...........................86
INPUT CLUTCH ASSEMBLY
DISASSEMBLY.........................86
ASSEMBLY............................95
OIL PUMP
DESCRIPTION........................110
OPERATION..........................110
DISASSEMBLY........................110
ASSEMBLY...........................112
PLANETARY GEARTRAIN
DESCRIPTION........................112
OPERATION..........................112
SEAL - OIL PUMP
REMOVAL............................113
INSTALLATION........................113
SHIFT INTERLOCK SOLENOID
DESCRIPTION........................113
OPERATION..........................114
DIAGNOSIS AND TESTING - BRAKE/
TRANSMISSION SHIFT INTERLOCK
SOLENOID..........................115
REMOVAL............................115
INSTALLATION........................116
SOLENOID/PRESSURE SWITCH ASSY
DESCRIPTION........................117
OPERATION..........................118
REMOVAL............................118
INSTALLATION........................119
RSTRANSMISSION/TRANSAXLE21-1

SPEED SENSOR - INPUT
DESCRIPTION........................120
OPERATION..........................120
REMOVAL............................121
INSTALLATION........................121
SPEED SENSOR - OUTPUT
DESCRIPTION........................122
OPERATION..........................122
REMOVAL............................123
INSTALLATION........................123
TORQUE CONVERTER
DESCRIPTION........................124
OPERATION..........................128
REMOVAL............................129
INSTALLATION........................129TRANSMISSION CONTROL RELAY
DESCRIPTION........................130
OPERATION..........................130
TRANSMISSION RANGE SENSOR
DESCRIPTION........................130
OPERATION..........................131
REMOVAL............................131
INSTALLATION........................131
VALVE BODY
DESCRIPTION........................132
OPERATION..........................132
REMOVAL............................133
DISASSEMBLY........................135
ASSEMBLY...........................139
INSTALLATION........................144
40TE AUTOMATIC
TRANSAXLE
DESCRIPTION
The 40TE (Fig. 1) is a four-speed transaxle that is
a conventional hydraulic/mechanical assembly with
an integral differential, and is controlled with adap-
tive electronic controls and monitors. The hydraulic
system of the transaxle consists of the transaxle
fluid, fluid passages, hydraulic valves, and various
line pressure control components. An input clutch
assembly which houses the underdrive, overdrive,
and reverse clutches is used. It also utilizes separate
holding clutches: 2nd/4th gear and Low/Reverse. The
primary mechanical components of the transaxle con-
sist of the following:
²Three multiple disc input clutches
²Two multiple disc holding clutches
²Four hydraulic accumulators
²Two planetary gear sets
²Hydraulic oil pump
²Valve body²Solenoid/Pressure switch assembly
²Integral differential assembly
Control of the transaxle is accomplished by fully
adaptive electronics. Optimum shift scheduling is
accomplished through continuous real-time sensor
feedback information provided to the Powertrain
Control Module (PCM) or Transmission Control Mod-
ule (TCM).
The PCM/TCM is the heart of the electronic control
system and relies on information from various direct
and indirect inputs (sensors, switches, etc.) to deter-
mine driver demand and vehicle operating condi-
tions. With this information, the PCM/TCM can
calculate and perform timely and quality shifts
through various output or control devices (solenoid
pack, transmission control relay, etc.).
The PCM/TCM also performs certain self-diagnos-
tic functions and provides comprehensive information
(sensor data, DTC's, etc.) which is helpful in proper
diagnosis and repair. This information can be viewed
with the DRB scan tool.
21 - 2 40TE AUTOMATIC TRANSAXLERS