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Precautions .................................................7-1
Precautions............................................................. 7-1
Precautions on HVAC ........................................... 7-1
Heater and Ventilation............................. 7A-1
General Description .............................................7A-1
Heater and Ventilation Construction ................... 7A-1
Schematic and Routing Diagram........................7A-2
Diagnostic Information and Procedures............7A-3
Heater and Ventilation Symptom Diagnosis........ 7A-3
Repair Instructions ..............................................7A-4
HVAC Unit Components ..................................... 7A-4
HVAC Unit Removal and Installation .................. 7A-4
Blower Motor Removal and Installation............... 7A-4
Blower Motor Inspection ..................................... 7A-4
Blower Motor Resistor Inspection ....................... 7A-5
Blower Motor Relay Inspection ........................... 7A-6
HVAC Control Unit Components......................... 7A-6
HVAC Control Unit Removal and Installation...... 7A-7
Blower Speed Selector Inspection ...................... 7A-9
Air Intake Selector Inspection ............................. 7A-9
Air Intake Control Actuator Inspection .............. 7A-10
HVAC Air Filter Inspection (If Equipped)........... 7A-12
Air Conditioning System......................... 7B-1
Manual Type ............................................................7B-1
Precautions...........................................................7B-1
A/C System Caution............................................ 7B-1
Precautions on Servicing A/C System ................ 7B-1
General Description .............................................7B-3
Refrigerant Type Identification ............................ 7B-3
Sub-Cool A/C System Description ...................... 7B-4
A/C Operation Description .................................. 7B-4
Section 7
HVAC
CONTENTS
Schematic and Routing Diagram ........................7B-5
Major Components of A/C System......................7B-5
A/C System Wiring Diagram ...............................7B-6
Diagnostic Information and Procedures ............7B-7
A/C System Symptom Diagnosis ........................7B-7
A/C System Performance Inspection ................7B-10
A/C System Inspection at ECM.........................7B-15
Repair Instructions ............................................7B-16
Receiver/Dryer Removal and Installation..........7B-22
HVAC Unit Components ...................................7B-23
HVAC Unit Removal and Installation ................7B-24
Evaporator Inspection .......................................7B-24
Expansion Valve Removal and Installation .......7B-26
Expansion Valve Inspection ..............................7B-26
A/C Switch Inspection .......................................7B-27
Compressor Relay Inspection ...........................7B-27
Compressor Assembly Components.................7B-29
Magnet Clutch Inspection..................................7B-29
Magnet Clutch Removal and Installation...........7B-29
Relief Valve Inspection......................................7B-31
Relief Valve Removal and Installation...............7B-32
Specifications .....................................................7B-32
Tightening Torque Specifications......................7B-32
Special Tools and Equipment ...........................7B-33
Table of Contents 7- i
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