Chrysler RG Voyager. Manual — part 1216

(3) Remove the windshield wiper assembly from

the vehicle (Refer to 8 - ELECTRICAL/WIPERS/
WASHERS/WIPER MODULE - REMOVAL).

(4) If equipped with rear A/C, disconnect the liquid

and suction lines from the A/C expansion valve
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - REAR/LIQUID LINE - REMOVAL).

(5) Remove the retainer that secures the evapora-

tor temperature sensor to the A/C expansion valve
(Fig. 23).

NOTE: To disconnect the wire harness connector
from the evaporator temperature sensor, first push
the red retaining ring toward the connector to
release the lock, then disconnect the connector
from the sensor.

(6) Remove the evaporator temperature sensor

from the A/C expansion valve and disconnect the
wire harness connector.

RS MODELS

(1) Disconnect and isolate the negative battery

cable.

(2) Remove the instrument panel from the vehicle

(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL ASSEMBLY - REMOVAL).

(3) Disconnect the wire harness connector from the

evaporator temperature sensor located on the top of
the HVAC housing (Fig. 24).

(4) Remove the evaporator temperature sensor

from the HVAC housing.

INSTALLATION

RG MODELS

NOTE: Any grease removed with the evaporator
temperature sensor must be replaced. Failure to do
so could result in poor A/C performance.

(1) Position the evaporator temperature sensor

into the right rear corner of the engine compartment.

NOTE: To connect the wire harness connector to
the evaporator temperature sensor, first connect the
connector to the sensor, then pull the red retaining
ring toward the sensor.

(2) Connect the wire harness connector to the

evaporator temperature sensor.

(3) Install the evaporator temperature sensor onto

the top of the expansion valve with the sensor probe
inserted into the well in the expansion valve.

(4) Install the temperature sensor retainer.
(5) If equipped with rear A/C, connect the liquid

and suction lines to the A/C expansion valve and
recharge the A/C system (Refer to 24 - HEATING &
AIR CONDITIONING/PLUMBING/LIQUID LINE -
INSTALLATION).

(6) Install the window wiper module (Refer to 8 -

ELECTRICAL/WIPERS/WASHERS/WIPER

MOD-

ULE - INSTALLATION).

Fig. 23 Evaporator Temperature Sensor (RG

Models)-Rear A/C shown

1 - RIGHT FRONT STRUT TOWER
2 - EVAPORATOR TEMPERATURE SENSOR
3 - A/C EXPANSION VALVE
4 - DASH PANEL
5 - RETAINER

Fig. 24 Evaporator Temperature Sensor - RS Models

1 - EVAPORATOR TEMPERATURE SENSOR
2 - WIRE HARNESS CONNECTOR
3 - HVAC HOUSING

RS

CONTROLS - FRONT

24 - 29

EVAPORATOR TEMPERATURE SENSOR (Continued)

(7) Install the air cleaner housing into the right

side of the engine compartment.

(8) Reconnect the negative battery cable.
(9) Run the HVAC Cool Down test to verify system

is operating properly (Refer to 24 - HEATING & AIR
CONDITIONING - DIAGNOSIS AND TESTING -
A/C COOLDOWN TEST).

RS MODELS

(1) Install the evaporator temperature sensor into

the top of the HVAC housing.

(2) Connect the wire harness connector to the

evaporator temperature sensor.

(3) Install the instrument panel (Refer to 23 -

BODY/INSTRUMENT

PANEL/INSTRUMENT

PANEL ASSEMBLY - INSTALLATION).

(4) Reconnect the negative battery cable.

INFRARED TEMPERATURE
SENSOR

DESCRIPTION

The infrared temperature sensor consists of two

infrared transducers that are concealed behind a
clear lens located near the top of the instrument
panel center bezel (Fig. 25). These sensors are used
only on models equipped with the optional automatic
temperature control (ATC) heating-A/C system. A
molded plastic connector receptacle on the bottom of
the panel outlet unit is concealed behind the center
bezel. A short, dedicated jumper wire harness routed
behind the center bezel connects the sensors directly
to the ATC A/C-heater control module near the bot-
tom of the center bezel. The infrared temperature
sensor is integral to the center bezel panel outlet.

OPERATION

The infrared sensor detects thermal radiation emit-

ted by the driver and front passenger seat occupants
and their surroundings and converts its data into a
linear pulse width modulated (PWM) output signal
which is read by the automatic temperature control
(ATC) A/C-heater control. The ATC A/C-heater control
uses the infrared sensor data as one of the inputs
necessary to automatically control the interior cabin
temperature level. By using thermal radiation (sur-
face temperature) measurement, rather than an air
temperature measurement, the ATC heating-A/C sys-
tem is able to adjust itself to the comfort level as per-
ceived by the occupant. This allows the ATC system
to compensate for other ambient conditions affecting
comfort levels, such as solar heat gain or evaporative
heat loss.

The ATC system logic responds to the infrared sen-

sor message by calculating and adjusting the air flow

temperature and air flow rate needed to properly
obtain and maintain the selected comfort level tem-
perature of the occupants. The A/C-heater control
continually monitors the infrared sensor circuits, and
will store diagnostic trouble codes (DTCs) for any
problem it detects.

The infrared sensor is diagnosed using a DRBIII

t

scan tool. Refer to Body Diagnostic Procedures.

The infrared sensor cannot be adjusted or repaired

and, if faulty or damaged, it must be replaced.

MODE DOOR ACTUATOR

DESCRIPTION

The mode door actuator for the front heating-A/C

system is a reversible, 12-volt Direct Current (DC),
servo motor (Fig. 26). The single mode door actuator
is located on the driver side end of the front HVAC
air distribution housing, close to the top of the distri-
bution housing. The mode door actuator is mechani-
cally connected to the mode door.

The front mode door actuator is interchangeable

with the actuators for the blend-air doors and the
recirculation-air door. Each actuator is contained
within an identical black molded plastic housing with
an integral wire connector receptacle. Each actuator
also has an identical output shaft with splines that
connects it to its respective door linkage and two
integral mounting tabs that allow the actuator to be
secured to the front HVAC housing. The front mode
door actuator does not require mechanical indexing

Fig. 25 Infrared Temperature Sensor – RS shown,

RG typical

1 - INSTRUMENT PANEL CENTER BEZEL
2 - CENTER IP AIR OUTLETS
3 - INFRARED TEMPERATURE SENSOR

24 - 30

CONTROLS - FRONT

RS

EVAPORATOR TEMPERATURE SENSOR (Continued)

to the mode-air doors, as it is electronically cali-
brated by the A/C-heater control.

The A/C-heater control must be recalibrated each

time an actuator motor is replaced (Refer to 24 -
HEATING & AIR CONDITIONING/CONTROLS -
FRONT/A/C

HEATER

CONTROL

-

STANDARD

PROCEDURE -A/C-HEATER CONTROL CALIBRA-
TION).

OPERATION

The mode door actuator is connected to the A/C-

heater control through the vehicle electrical system
by a dedicated two-wire lead and connector of the
HVAC wire harness. The mode door actuator can
move the mode-air doors in two directions. When the
A/C-heater control pulls the voltage on one side of
the motor connection high and the other connection
low, the mode-air doors will move in one direction.
When the A/C-heater control reverses the polarity of
the voltage to the motor, the mode-air doors move in
the opposite direction.

When the A/C-heater control makes the voltage to

both connections high or both connections low, the
mode-air doors stop and will not move.

The A/C-heater control uses a feedback signal posi-

tioning system to monitor the operation and relative
position of the mode door actuator and the mode-air
doors. The A/C-heater control learns the mode-air
doors stop positions during the calibration procedure
and will store a diagnostic trouble code (DTC) for any
problems it detects in the mode door actuator cir-
cuits.

The mode door actuator is diagnosed using a

DRBIII

t scan tool. Refer to 9 - Engine Electrical

Diagnostics for more information.

The mode door actuator cannot be adjusted or

repaired and, if faulty or damaged, it must be
replaced.

REMOVAL

WARNING: On vehicles equipped with airbags, dis-
able the airbag system before attempting any steer-
ing wheel, steering column, or instrument panel
component diagnosis or service. Disconnect and
isolate the negative battery (ground) cable, then
wait two minutes for the airbag system capacitor to
discharge before performing further diagnosis or
service. This is the only sure way to disable the air-
bag system. Failure to take the proper precautions
could result in accidental airbag deployment and
possible personal injury or death.

(1) Disconnect and isolate the negative battery

cable.

(2) Remove the silencer from beneath the driver

side end of the instrument panel. (Refer to 23 -
BODY/INSTRUMENT

PANEL/INSTRUMENT

PANEL SILENCER - REMOVAL).

(3) Disconnect the wire harness connector from the

mode door actuator (Fig. 27).

(4) Remove the two screws that secure the mode

door actuator to the HVAC air distribution housing
and remove the actuator.

Fig. 26 Mode Door Actuator

1 - ACTUATOR MOTOR
2 - WIRE CONNECTOR RECEPTACLE
3 - OUTPUT SHAFT
4 - MOUNTING TAB (2)

Fig. 27 Mode Door Actuator

1 - WIRE HARNESS CONNECTOR
2 - MODE DOOR ACTUATOR
3 - SCREW (2)
4 - DRIVER BLEND DOOR ACTUATOR (DUAL-ZONE)
5 - HEATER CORE
6 - BLEND DOOR ACTUATOR (SINGLE ZONE) OR PASSENGER
BLEND DOOR ACTUATOR (DUAL-ZONE)

RS

CONTROLS - FRONT

24 - 31

MODE DOOR ACTUATOR (Continued)

INSTALLATION

(1) Position the mode door actuator onto the HVAC

air distribution housing. If necessary, rotate the
actuator slightly to align the splines on the actuator
output shaft with those in the mode door linkage.

(2) Install the two screws that secure the mode

door actuator to the air distribution housing. Tighten
the screws to 2 N·m (17 in. lbs.).

(3) Connect the wire harness connector to the

mode door actuator.

(4) Install the silencer under the driver side end of

the instrument panel (Refer to 23 - BODY/INSTRU-
MENT PANEL/INSTRUMENT PANEL SILENCER -
INSTALLATION).

(5) Reconnect the negative battery cable and cali-

brate the A/C-heater control (Refer to 24 - HEATING
& AIR CONDITIONING/CONTROLS - FRONT/A/C
HEATER CONTROL - STANDARD PROCEDURE
-A/C-HEATER CONTROL CALIBRATION).

RECIRCULATION DOOR
ACTUATOR

DESCRIPTION

The recirculation door actuator is a reversible, 12

volt direct current (DC), servo motor (Fig. 28). The
recirculation door actuator is located on the bottom of
the HVAC air inlet housing and is directly connected
to the pivot shaft of the recirculation-air door.

The recirculation door actuator is interchangeable

with the actuators for the blend-air door(s) and the
mode-air doors. Each actuator is contained within an
identical black molded plastic housing with an inte-
gral wire connector receptacle. Each actuator also
has an identical output shaft with splines that con-
nects it to its door linkage and two integral mounting
tabs that allow the actuator to be secured to the air
inlet housing. The recirculation door actuator does
not require mechanical indexing to the recirculation-
air door, as it is electronically calibrated by the A/C-
heater control.

The A/C-heater control must be recalibrated each

time an actuator motor is replaced (Refer to 24 -
HEATING & AIR CONDITIONING/CONTROLS -
FRONT/A/C

HEATER

CONTROL

-

STANDARD

PROCEDURE -A/C-HEATER CONTROL CALIBRA-
TION).

OPERATION

The recirculation door actuator is connected to the

A/C-heater control through the vehicle electrical sys-
tem by a dedicated two-wire lead and connector of
the HVAC wire harness. The recirculation door
actuator can move the recirculation-air door in two
directions. When the A/C-heater control pulls the
voltage on one side of the motor connection high and
the other connection low, the recirculation-air door
will move in one direction. When the A/C-heater con-
trol reverses the polarity of the voltage to the motor,
the recirculation-air door moves in the opposite direc-
tion.

When the A/C-heater control makes the voltage to

both connections high or both connections low, the
recirculation-air door stops and will not move.

The A/C-heater control uses a feedback signal posi-

tioning system to monitor the operation and relative
position of the recirculation door actuator and the
recirculation-air door. The A/C-heater control learns
the recirculation-air door stop positions during the
calibration procedure and will store a diagnostic
trouble code (DTC) for any problems it detects in the
recirculation door actuator circuits.

The recirculation door actuator is diagnosed using

a DRBIII

t scan tool. Refer to 9 - Engine Electrical

Diagnostics for more information.

The recirculation door actuator cannot be adjusted

or repaired and, if faulty or damaged, it must be
replaced.

Fig. 28 Recirculation Door Actuator

1 - ACTUATOR MOTOR
2 - WIRE CONNECTOR RECEPTACLE
3 - OUTPUT SHAFT
4 - MOUNTING TAB (2)

24 - 32

CONTROLS - FRONT

RS

MODE DOOR ACTUATOR (Continued)