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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

Oxidation catalyst

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

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

***

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

***

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

***

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

Throttle chamber
SPI body

Throttle body fuel injection system

TBI system

Fuel injection control

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

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

SECTION

CONTENTS

PRECAUTIONS ...............................................................2

Supplemental Restraint System (SRS)

SEAT BELT PRE-TENSIONER

″

...............2

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

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:

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.

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:

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.

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.

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:

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.

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.

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:

Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into
the atmosphere.

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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