Infiniti I30 (A33). Manual — part 510
NEW TERM
NEW ACRONYM /
ABBREVIATION
OLD TERM
Malfunction indicator lamp
MIL
Check engine light
Manifold absolute pressure
MAP
***
Manifold absolute pressure sensor
MAPS
***
Manifold differential pressure
MDP
***
Manifold differential pressure sensor
MDPS
***
Manifold surface temperature
MST
***
Manifold surface temperature sensor
MSTS
***
Manifold vacuum zone
MVZ
***
Manifold vacuum zone sensor
MVZS
***
Mass air flow sensor
MAFS
Air flow meter
Mixture control solenoid valve
MC solenoid valve
Air-fuel ratio control solenoid valve
Multiport fuel injection system
MFI system
Fuel injection control
Nonvolatile random access memory
NVRAM
***
On board diagnostic system
OBD system
Self-diagnosis
Open loop
OL
Open loop
Oxidation catalyst
OC
Catalyst
Oxidation catalytic converter system
OC system
***
Oxygen sensor
O2S
Exhaust gas sensor
Park position switch
***
Park switch
Park/neutral position switch
PNP switch
Park/neutral switch
Inhibitor switch
Neutral position switch
Periodic trap oxidizer system
PTOX system
***
Positive crankcase ventilation
PCV
Positive crankcase ventilation
Positive crankcase ventilation valve
PCV valve
PCV valve
Powertrain control module
PCM
***
Programmable read only memory
PROM
***
Pulsed secondary air injection control
solenoid valve
PAIRC solenoid valve
AIV control solenoid valve
Pulsed secondary air injection system
PAIR system
Air induction valve (AIV) control
Pulsed secondary air injection valve
PAIR valve
Air induction valve
Random access memory
RAM
***
Read only memory
ROM
***
Scan tool
ST
***
Secondary air injection pump
AIR pump
***
Secondary air injection system
AIR system
***
Sequential multiport fuel injection system
SFI system
Sequential fuel injection
Service reminder indicator
SRI
***
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SAE J1930 TERMINOLOGY LIST
SAE J1930 Terminology List (Cont’d)
GI-53
NEW TERM
NEW ACRONYM /
ABBREVIATION
OLD TERM
Simultaneous multiport fuel injection sys-
tem
***
Simultaneous fuel injection
Smoke puff limiter system
SPL system
***
Supercharger
SC
***
Supercharger bypass
SCB
***
System readiness test
SRT
***
Thermal vacuum valve
TVV
Thermal vacuum valve
Three way catalyst
TWC
Catalyst
Three way catalytic converter system
TWC system
***
Three way + oxidation catalyst
TWC + OC
Catalyst
Three way + oxidation catalytic converter
system
TWC + OC system
***
Throttle body
TB
Throttle chamber
SPI body
Throttle body fuel injection system
TBI system
Fuel injection control
Throttle position
TP
Throttle position
Throttle position sensor
TPS
Throttle sensor
Throttle position switch
TP switch
Throttle switch
Torque converter clutch solenoid valve
TCC solenoid valve
Lock-up cancel solenoid
Lock-up solenoid
Transmission control module
TCM
A/T control unit
Turbocharger
TC
Turbocharger
Vehicle speed sensor
VSS
Vehicle speed sensor
Volume air flow sensor
VAFS
Air flow meter
Warm up oxidation catalyst
WU-OC
Catalyst
Warm up oxidation catalytic converter sys-
tem
WU-OC system
***
Warm up three way catalyst
WU-TWC
Catalyst
Warm up three way catalytic converter
system
WU-TWC system
***
Wide open throttle position switch
WOTP switch
Full switch
SAE J1930 TERMINOLOGY LIST
SAE J1930 Terminology List (Cont’d)
GI-54
HEATER &
AIR CONDITIONER
CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . ...2
Supplemental Restraint System (SRS)
. . . ...2
Precautions for Working with HFC-134a (R-134a) . .2
General Refrigerant Precautions . . . . . . . . .3
Precautions for Leak Detection Dye. . . . . . . 3
Identification. . . . . . . . . . . . . . . . .4
Precautions for Refrigerant Connection . . . . . ..4
Precautions for Servicing Compressor. . . . . . 7
Precautions for Service Equipment . . . . . . . .7
Wiring Diagrams and Trouble Diagnosis. . . . . .9
PREPARATION . . . . . . . . . . . . . . . .10
Special Service Tools . . . . . . . . . . . . 10
HFC-134a (R-134a) Service Tools and
Equipment. . . . . . . . . . . . . . . . .. 11
DESCRIPTION . . . . . . . . . . . . . . . ...14
Refrigeration System . . . . . . . . . . . . .14
V-6 Variable Displacement Compressor. . . . . 15
Component Layout . . . . . . . . . . . . . 20
Introduction . . . . . . . . . . . . . . . . 21
Features. . . . . . . . . . . . . . . . . .21
Overview of Control System. . . . . . . . . ..24
Control Operation . . . . . . . . . . . . . ..24
Discharge Air Flow. . . . . . . . . . . . . .26
System Description. . . . . . . . . . . . . 27
TROUBLE DIAGNOSES. . . . . . . . . . . . 28
Component Location. . . . . . . . . . . . ..28
Circuit Diagram . . . . . . . . . . . . . . ..30
Wiring Diagram - A/C, A - . . . . . . . . . . ..31
Auto Amp. Terminals and Reference Value. . . ...34
Self-diagnosis . . . . . . . . . . . . . . . 36
How to Perform Trouble Diagnoses for Quick
and Accurate Repair . . . . . . . . . . . . ..46
Operational Check . . . . . . . . . . . . . .47
A/C System. . . . . . . . . . . . . . . . 50
Mode Door Motor. . . . . . . . . . . . . ...53
Air Mix Door Motor . . . . . . . . . . . . . 60
Intake Door Motor. . . . . . . . . . . . . ..63
Blower Motor. . . . . . . . . . . . . . . ..66
Magnet Clutch. . . . . . . . . . . . . . . 75
Insufficient Cooling . . . . . . . . . . . . . 81
Insufficient Heating . . . . . . . . . . . . . 89
Noise. . . . . . . . . . . . . . . . . . ..90
Self-diagnosis . . . . . . . . . . . . . . . 91
Memory Function . . . . . . . . . . . . . ...92
ECON (ECONOMY) Mode . . . . . . . . . . 93
Ambient Sensor Circuit. . . . . . . . . . . ..93
In-vehicle Sensor Circuit. . . . . . . . . . . 97
Sunload Sensor Circuit. . . . . . . . . . . 100
Intake Sensor Circuit . . . . . . . . . . . ...104
Air Mix Door Motor PBR Circuit . . . . . . . ..106
SERVICE PROCEDURE. . . . . . . . . . . ..107
HFC-134a (R-134a) Service Procedure . . . . ..107
Maintenance of Lubricant Quantity in
Compressor . . . . . . . . . . . . . . . .109
Compressor . . . . . . . . . . . . . . . . 112
Compressor Clutch . . . . . . . . . . . . .. 112
Heater Unit (Heater Core) . . . . . . . . . ... 116
Blower and Cooling Unit (A/C Evaporator) . . . . 117
Refrigerant Lines . . . . . . . . . . . . . . 118
Fluorescent Dye Leak Detector. . . . . . . ...122
Belt. . . . . . . . . . . . . . . . . . ...123
Idle Air Control Valve (IACV) - Auxiliary Air
Control (AAC) Valve . . . . . . . . . . . . 123
Ventilation Air Filter. . . . . . . . . . . . ..123
SERVICE DATA AND SPECIFICATIONS (SDS) . ...125
Compressor . . . . . . . . . . . . . . . .125
Lubricant . . . . . . . . . . . . . . . . ..125
Refrigerant . . . . . . . . . . . . . . . ...125
Engine Idling Speed (When A/C is ON) . . . . ..125
Belt Tension . . . . . . . . . . . . . . . .125
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
NHHA0153
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 I30 is as follows:
I
For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I
For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized INFINITI dealer.
I
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
I
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for Working with HFC-134a
(R-134a)
NHHA0154
WARNING:
I
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed and compressor failure is likely to occur, refer to “CONTAMINATED REFRIGERANT”
below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrig-
erant Recovery/Recycling Recharging equipment (ACR4) (J-39500-INF) and Refrigerant Identifier.
I
Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. If lubricant other than that specified is used, compressor failure is likely to occur.
I
The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precautions must be observed:
a) When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
b) When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as pos-
sible to minimize the entry of moisture into system.
c) Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri-
cant. Without proper sealing, lubricant will become moisture saturated and should not be used.
d) Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove R-134a from the A/C system, using certified service equipment meeting require-
ments of SAE J2210 (R-134a recycling equipment), or J2209 (R-134a recovery equipment). If acci-
dental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and lubricant manufacturers.
e) Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts.
Damage may result.
CONTAMINATED REFRIGERANT
NHHA0154S01
If a refrigerant other than pure R-134a is identified in a vehicle, your options are:
I
Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into
the atmosphere.
I
Explain that recovery of the contaminated refrigerant could damage your service equipment and refriger-
ant supply.
PRECAUTIONS
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
HA-2
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