Nissan Maxima Workshop Manual 2000 (12) PDF

HEATER &
AIR CONDITIONER
SECTION
HA
CONTENTS
AUTO
PRECAUTIONS ...............................................................3
Supplemental Restraint System (SRS) ?AIR
BAG? and ?SEAT BELT PRE-TENSIONER?...............3
Precautions for Working with HFC-134a (R-134a) .....3
General Refrigerant Precautions.................................4
Precautions for Refrigerant Connection......................4
Precautions for Servicing Compressor........................7
Precautions for Service Equipment.............................7
Wiring Diagrams and Trouble Diagnoses....................9
PREPARATION .............................................................10
Special Service Tools ................................................10
HFC-134a (R-134a) Service Tools and
Equipment..................................................................11
DESCRIPTION...............................................................13
Refrigeration System.................................................13
V-6 Variable Displacement Compressor....................14
Component Layout ....................................................19
Introduction................................................................20
Features.....................................................................20
Overview of Control System......................................23
Control Operation ......................................................23
Discharge Air Flow.....................................................26
System Description....................................................27
TROUBLE DIAGNOSES................................................29
Component Location..................................................29
Circuit Diagram..........................................................31
Wiring Diagram - A/C, A -..........................................32
Auto Amp. Terminals and Reference Value...............36
Self-diagnosis ............................................................38
How to Perform Trouble Diagnoses for Quick
and Accurate Repair..................................................48
Operational Check.....................................................49
A/C System................................................................53
Mode Door Motor.......................................................56
Air Mix Door Motor ....................................................62
Intake Door Motor......................................................65
Blower Motor..............................................................68
Magnet Clutch............................................................76
Insufficient Cooling ....................................................82
Insufficient Heating....................................................90
Noise..........................................................................91
Self-diagnosis ............................................................92
Memory Function.......................................................93
ECON (ECONOMY) Mode........................................94
Ambient Sensor Circuit..............................................94
In-vehicle Sensor Circuit............................................97
Sunload Sensor Circuit............................................101
Intake Sensor Circuit...............................................104
Air Mix Door Motor PBR Circuit ..............................107
SERVICE PROCEDURE..............................................108
HFC-134a (R-134a) Service Procedure..................108
Maintenance of Lubricant Quantity in
Compressor .............................................................110
Compressor .............................................................113
Compressor Clutch..................................................113
Heater Unit (Heater Core).......................................117
Blower and Cooling Unit (A/C Evaporator) .............118
Refrigerant Lines .....................................................119
Belt...........................................................................123
Idle Air Control Valve (IACV) - Auxiliary Air
Control (AAC) Valve ................................................124
Ventilation Air Filter..................................................124
SERVICE DATA AND SPECIFICATIONS (SDS).......125
Auto..........................................................................125
MANUAL
PRECAUTIONS ...........................................................126
Supplemental Restraint System (SRS) ?AIR
BAG? and ?SEAT BELT PRE-TENSIONER?...........126
Precautions for Working with HFC-134a (R-134a) .126
General Refrigerant Precautions.............................127
Precautions for Refrigerant Connection..................127
Precautions for Servicing Compressor....................130
Precautions for Service Equipment.........................130
Wiring Diagrams and Trouble Diagnoses................132