Chrysler 2000 LHS - Description and Operation Atc In-Car Temperature Sensor; Table of Contents; Heating and Air Conditioning

HEATING AND AIR CONDITIONING
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
ATC IN-CAR TEMPERATURE SENSOR.........1
BLOWER MOTOR RESISTOR................2
BLOWER MOTOR POWER MODULE ..........2
COMPRESSOR ...........................2
ENGINE COOLING SYSTEM REQUIREMENTS...3
EVAPORATOR TEMPERATURE SENSOR .......3
EXPANSION VALVE........................3
FILTER-DRIER............................4
HANDLING TUBING AND FITTINGS...........4
HVAC FORCED RECIRCULATION .............5
REFRIGERANT LINES......................5
SIDE WINDOW DEMISTERS ................6
SUN SENSOR ............................6
SYSTEM AIRFLOW........................6
DIAGNOSIS AND TESTING
A/C PERFORMANCE TEST ..................6
ATC IN-CAR TEMPERATURE SENSOR.........7
COMPRESSOR ...........................7
EXPANSION VALVE........................7
SELF DIAGNOSTICS .......................8
HEATER PERFORMANCE TEST .............10
SUN SENSOR ...........................10
SYSTEM OIL LEVEL ......................11
SERVICE PROCEDURES
EVACUATING REFRIGERANT SYSTEM........11
R-134a REFRIGERANT ....................12
THERMOCOUPLE PROBE..................13
SYSTEM CHARGE LEVEL..................14
SYSTEM LEAK CHECKING .................15
REMOVAL AND INSTALLATION
SAFETY PRECAUTIONS AND WARNINGS .....16
A/C PRESSURE TRANSDUCER .............16
AMBIENT TEMPERATURE SENSOR ..........17
ATC IN-CAR TEMPERATURE SENSOR........17
BLOWER MOTOR AND WHEEL ASSEMBLY....18
BLOWER MOTOR POWER MODULE .........18
BLOWER MOTOR RESISTOR...............18
BLOWER MOTOR WHEEL .................18
COMPRESSOR ..........................18
COMPRESSOR HIGH-PRESSURE RELIEF
VALVE ...............................19
COMPRESSOR CLUTCH/COIL ASSEMBLY.....19
CONDENSER............................21
CONTROL HEAD.........................22
DISCHARGE LINE........................22
EVAPORATOR ...........................23
EVAPORATOR TEMPERATURE SENSOR ......23
EXPANSION VALVE.......................23
FILTER/DRIER...........................24
HEATER CORE ..........................24
LIQUID LINES...........................24
MODE DOOR ACTUATOR ..................25
RECIRCULATION DOOR ACTUATOR .........25
SERVICE PORT VALVE CORES..............26
SUCTION LINE ..........................26
SUN SENSOR ...........................27
TEMPERATURE DOOR ACTUATOR...........28
HVAC UNIT HOUSING ....................28
DISASSEMBLY AND ASSEMBLY
HVAC UNIT HOUSING RECONDITION ........29
SPECIFICATIONS
A/C APPLICATION TABLE-ATC ..............30
A/C APPLICATION TABLE-MANUAL ..........30
DESCRIPTION AND OPERATION
ATC IN-CAR TEMPERATURE SENSOR
DESCRIPTION
The Automatic Temperature Control (ATC) In-Car
Temperature Sensor returns electrical signals to the
Body Control Module (BCM). The In-Car Tempera-
ture Sensor is used on ATC equipped vehicles only.
The In-Car Temperature Sensor is made up of two
parts. One part is the in-car sensor motor fan assem-
bly and the second part is a temperature thermistor.
The in-car sensor motor fan assembly attaches to the
back of the ATC Control head (Fig. 1). This assembly
has a small fan and a motor which draws air through
the intake on the front of the ATC control. The in-car
sensor thermistor is located inside of the ATC Con-
trol Head. Air drawn from the passenger compart-
ment by the in-car sensor motor-fan assembly, flows
over the thermistor. The in-car sensor thermistor
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