Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti G20 P11 1999-2002 Approved G20-P11-2002 ha
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HEATER &
AIR CONDITIONER GI
SECTION HA MA
EM
LC
EC
CONTENTS FE
AUTO Magnet Clutch............................................................73
CL
Insufficient Cooling ....................................................80
PRECAUTIONS ...............................................................3
Insufficient Heating ....................................................88 MT
Supplemental Restraint System (SRS) AIR
Noise..........................................................................89
BAG and SEAT BELT PRE-TENSIONER...............3
Self-diagnosis ............................................................90
Precautions for Working with HFC-134a (R-134a) .....3
Memory Function .......................................................91 AT
General Refrigerant Precautions .................................4
ECON (ECONOMY) Mode ........................................92
Precautions for Leak Detection Dye............................4
Ambient Sensor Circuit..............................................92
Identification.................................................................5
In-vehicle Sensor Circuit............................................95
AX
Precautions for Refrigerant Connection ......................5
Sunload Sensor Circuit..............................................99
Precautions for Servicing Compressor........................7
Intake Sensor Circuit ...............................................102 SU
Precautions for Service Equipment .............................7
Air Mix Door Motor PBR Circuit ..............................104
Wiring Diagrams and Trouble Diagnosis.....................9
SERVICE PROCEDURE..............................................105
PREPARATION .............................................................10
Special Service Tools ................................................10
HFC-134a (R-134a) Service Procedure ..................105 BR
Maintenance of Lubricant Quantity in
HFC-134a (R-134a) Service Tools and
Compressor .............................................................107
Equipment..................................................................11 ST
Compressor .............................................................110
DESCRIPTION ...............................................................14
Compressor Clutch .................................................. 111
Refrigeration System .................................................14
Thermal Protector ....................................................114
Component Layout ....................................................15 RS
Heater Unit (Heater Core) .......................................114
Introduction ................................................................16
Blower Unit ..............................................................115
Features.....................................................................16
Overview of Control System......................................19
Cooling Unit (A/C Evaporator).................................116 BT
Refrigerant Lines .....................................................117
Control Operation ......................................................19
Belt...........................................................................122
Discharge Air Flow.....................................................21
Idle Air Control Valve (IACV) - Auxiliary Air
TROUBLE DIAGNOSES................................................23
Control (AAC) Valve ................................................122
Component Location..................................................23
Ventilation Air Filter..................................................122
Circuit Diagram ..........................................................25
SERVICE DATA AND SPECIFICATIONS (SDS) .......123
SC
Wiring Diagram - A/C, A - ..........................................26
Auto..........................................................................123
Auto Amp. Terminals and Reference Value...............29
Self-diagnosis ............................................................31 EL
MANUAL
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ..................................................41 PRECAUTIONS ...........................................................124 IDX
Operational Check .....................................................42 Supplemental Restraint System (SRS) AIR
A/C System................................................................45 BAG and SEAT BELT PRE-TENSIONER...........124
Mode Door Motor.......................................................48 Precautions for Working with HFC-134a
Air Mix Door Motor ....................................................54 (R-134a)...................................................................124
Intake Door Motor......................................................58 General Refrigerant Precautions .............................125
Blower Motor..............................................................65 Precautions for Leak Detection Dye........................125
CONTENTS (Cont'd)
Identification.............................................................126 Air Mix Door.............................................................162
Precautions for Refrigerant Connection ..................126 Blower Motor............................................................167
Precautions for Servicing Compressor....................128 Magnet Clutch..........................................................174
Precautions for Service Equipment .........................128 Insufficient Cooling ..................................................182
Wiring Diagrams and Trouble Diagnosis.................130 Insufficient Heating ..................................................189
PREPARATION ...........................................................131 Noise........................................................................190
Special Service Tools ..............................................131 SERVICE PROCEDURE..............................................191
HFC-134a (R-134a) Service Tools and HFC-134a (R-134a) Service Procedure ..................191
Equipment................................................................132 Maintenance of Lubricant Quantity in
DESCRIPTION .............................................................135 Compressor .............................................................193
Refrigeration System ...............................................135 Compressor .............................................................196
Component Layout ..................................................136 Compressor Clutch ..................................................197
Control Operation ....................................................137 Thermal Protector ....................................................200
Discharge Air Flow...................................................138 Heater Unit (Heater Core) .......................................200
System Description..................................................139 Blower Unit ..............................................................201
TROUBLE DIAGNOSES..............................................140 Cooling Unit (A/C Evaporator).................................202
Component Location................................................140 Refrigerant Lines .....................................................203
Circuit Diagram - Air Conditioner.............................142 Belt...........................................................................208
Wiring Diagram - A/C, M - .......................................143 Idle Air Control Valve (IACV) - Auxiliary Air
How to Perform Trouble Diagnoses for Quick Control (AAC) Valve ................................................208
and Accurate Repair ................................................147 Ventilation Air Filter..................................................208
Operational Check ...................................................148 SERVICE DATA AND SPECIFICATIONS (SDS) .......209
A/C System..............................................................150 Manual .....................................................................209
Intake Door ..............................................................152
Mode Door Motor.....................................................156
HA-2
PRECAUTIONS AUTO
Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER" used along with
NCHA0181
GI
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 G20 is as follows: MA
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