Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX4 R50 1997-1998.2001 Approved QX4-R50-2001 ha
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HEATER &
AIR CONDITIONER GI
SECTION HA MA
EM
LC
EC
CONTENTS FE
PRECAUTIONS ...............................................................2 Operational Check .....................................................66
AT
Supplemental Restraint System (SRS) AIR A/C System................................................................71
BAG and SEAT BELT PRE-TENSIONER...............2 Mode Door Motor.......................................................75 TF
Precautions for Working with HFC-134a (R-134a) .....2 Air Mix Door Motor ....................................................82
General Refrigerant Precautions .................................3 Intake Door Motor......................................................87
Precautions for Leak Detection Dye............................3 Blower Motor..............................................................95 PD
Identification.................................................................4 Magnet Clutch..........................................................104
Precautions for Refrigerant Connection ......................4 Insufficient Cooling ..................................................112
Precautions for Servicing Compressor........................6 Insufficient Heating ..................................................121
AX
Precautions for Service Equipment .............................7 Noise........................................................................123
Wiring Diagrams and Trouble Diagnoses....................9 Self-diagnosis ..........................................................124 SU
PREPARATION .............................................................10 Memory Function .....................................................126
Special Service Tools ................................................10 ECON (ECONOMY) Mode ......................................128
HFC-134a (R-134a) Service Tools and Ambient Sensor Circuit............................................129 BR
Equipment..................................................................11 In-vehicle Sensor Circuit..........................................132
DESCRIPTION ...............................................................14 Sunload Sensor Circuit............................................135
Refrigeration System .................................................14 Intake Sensor Circuit ...............................................139 ST
V-6 Variable Displacement Compressor....................15 Air Mix Door Motor PBR Circuit ..............................141
Component Layout ....................................................19 Multiplex Communication Circuit .............................142
RS
Introduction ................................................................20 SERVICE PROCEDURE..............................................144
Features.....................................................................20 HFC-134a (R-134a) Service Procedure ..................144
Overview of Control System......................................23 Maintenance of Lubricant Quantity in BT
Control Operation ......................................................23 Compressor .............................................................146
Discharge Air Flow.....................................................25 Compressor .............................................................149
System Description....................................................26 Compressor Clutch ..................................................150
TROUBLE DIAGNOSES................................................27 Refrigerant Lines .....................................................154
Component Location..................................................27 Belt...........................................................................159
Circuit Diagram (Without Navigation System)...........30 Ventilation Air Filter..................................................159
SC
Wiring Diagram - A/C, A - (Without Navigation SERVICE DATA AND SPECIFICATIONS (SDS) .......160
System)......................................................................31 Compressor .............................................................160 EL
Circuit Diagram (With Navigation System)................35 Lubricant ..................................................................160
Wiring Diagram - A/C, A - (With Navigation Refrigerant ...............................................................160
System)......................................................................36 Engine Idling Speed (When A/C is ON) ..................160 IDX
Auto Amp. Terminals and Reference Value...............40 Belt Tension .............................................................160
Self-diagnosis ............................................................44
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ..................................................65
PRECAUTIONS
Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER" NBHA0001
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER" used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI QX4 is as follows:
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