CONTROLS - FRONT
TABLE OF CONTENTS
page page
A/C COMPRESSOR CLUTCH
DESCRIPTION ..........................8
OPERATION ............................8
STANDARD PROCEDURE
STANDARD PROCEDURE - COMPRESSOR
CLUTCH AIR GAP ......................9
STANDARD PROCEDURE - COMPRESSOR
CLUTCH BREAK-IN .....................9
REMOVAL .............................9
INSPECTION - COMPRESSOR CLUTCH/COIL . 10
INSTALLATION .........................11
A/C COMPRESSOR CLUTCH COIL
DIAGNOSIS AND TESTING - COMPRESSOR
CLUTCH COIL ........................12
A/C HEATER CONTROL
DESCRIPTION .........................12
OPERATION ...........................12
REMOVAL .............................12
INSTALLATION .........................13
A/C PRESSURE TRANSDUCER
DESCRIPTION .........................13
OPERATION ...........................13
DIAGNOSIS AND TESTING - A/C PRESSURE
TRANSDUCER .......................13
REMOVAL .............................14
INSTALLATION .........................14
AIR OUTLET TEMPERATURE SENSOR
DESCRIPTION .........................14
OPERATION ...........................15
REMOVAL .............................15
INSTALLATION .........................15
AMBIENT TEMPERATURE SENSOR
DESCRIPTION .........................15
OPERATION ...........................15
REMOVAL .............................15
INSTALLATION .........................16
BLOWER MOTOR RESISTOR BLOCK
DESCRIPTION .........................16
OPERATION ...........................16
DIAGNOSIS AND TESTING - BLOWER
MOTOR RESISTOR BLOCK ..............16
REMOVAL .............................16
INSTALLATION .........................17
BLOWER MOTOR SWITCH
DESCRIPTION .........................17
OPERATION ...........................17
DIAGNOSIS AND TESTING - BLOWER
MOTOR SWITCH ......................17
REMOVAL .............................17
EVAPORATOR TEMPERATURE SENSOR
DESCRIPTION .........................17
OPERATION ...........................18
REMOVAL .............................18
INSTALLATION .........................18
IN-CAR TEMPERATURE SENSOR
DESCRIPTION .........................19
OPERATION ...........................19
DIAGNOSIS AND TESTING ................19
REMOVAL .............................19
MODE DOOR CABLES
REMOVAL .............................19
INSTALLATION .........................19
RECIRCULATION DOOR ACTUATOR
DESCRIPTION .........................20
OPERATION ...........................20
REMOVAL .............................21
INSTALLATION .........................21
A/C COMPRESSOR CLUTCH
DESCRIPTION
The compressor clutch assembly consists of a sta-
tionary electromagnetic coil, a hub bearing and pul-
ley assembly, and a clutch plate (Fig. 1). The
electromagnetic coil unit and the hub bearing and
pulley assembly are each retained on the nose of the
compressor front housing with snap rings. The clutch
plate is keyed to the compressor shaft and secured
with a bolt.
The compressor clutch plate and pully, or the clutch
coil are available for seperate service replacement.
OPERATION
The compressor clutch components provide the
means to engage and disengage the compressor from
the engine serpentine accessory drive belt. When the
clutch coil is energized, it magnetically draws the
clutch into contact with the pulley and drives the
compressor shaft. When the coil is not energized, the
pulley freewheels on the clutch hub bearing, which is
part of the pulley.
24 - 8 CONTROLS - FRONT VA
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