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Infiniti I30. Emission Control System (2003 year). Manual - part 2

DTC*1

Items (CONSULT-II screen terms)

Trip

MIL lighting up

Reference page

CONSULT-II

GST*2

ECM*3

P2135

2135

TP SENSOR

EC-656

P2138

2138

APP SENSOR

EC-662

*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: The troubleshooting for this DTC needs CONSULT-II.
*6: When fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.

IDX

TROUBLE DIAGNOSIS — INDEX

DTC No. Index (Cont’d)

EC-17

Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”

NHEC0002

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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system
uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag,
depending on the severity of a collision and whether the front occupants are belted or unbelted. The SRS
system composition which is available to INFINITI MODEL I35 is as follows:

쐌

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, crash zone sensor, warning lamp, wiring harness and spiral cable.

쐌

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:

쐌

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.

쐌

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.

쐌

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connec-
tor.

Precautions for On Board Diagnostic (OBD)
System of Engine and A/T

NHEC0003

The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.

CAUTION:

쐌

Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MIL to light up.

쐌

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

쐌

Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to EL-8, “HARNESS
CONNECTOR (SLIDE-LOCKING TYPE)”.

쐌

Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to light up due to the short circuit.

쐌

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

쐌

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM or
TCM (Transmission control module) before returning the vehicle to the customer.

PRECAUTIONS

Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

EC-18

Engine Fuel & Emission Control System

NHEC0004

SEF242XD

IDX

PRECAUTIONS

Engine Fuel & Emission Control System

EC-19

SEF289H

Precautions

NHEC0005

쐌

Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
ECM because battery voltage is applied to ECM even if
ignition switch is turned off.

SEF908W

쐌

When connecting ECM harness connector, fasten it
securely with a lever as far as it will go as shown at left.

SEF291H

쐌

When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

MEF040D

쐌

Before replacing ECM, perform “ECM Terminals and Ref-
erence Value” inspection and make sure ECM functions
properly. Refer to EC-136.

SEF217U

쐌

After performing each TROUBLE DIAGNOSIS, perform
“DTC Confirmation Procedure” or “Overall Function
Check”.
The DTC should not be displayed in the “DTC Confirma-
tion Procedure” if the repair is completed. The “Overall
Function Check” should be a good result if the repair is
completed.

PRECAUTIONS

Precautions

EC-20

SEF348N

쐌

When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.

쐌

Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than the ECM
terminals, such as the ground.

SEC893C

쐌

B1 indicates the bank 1, B2 indicates the bank 2 as shown
in the figure.

Wiring Diagrams and Trouble Diagnosis

NHEC0006

When you read Wiring diagrams, refer to the following:

쐌

GI-11, “HOW TO READ WIRING DIAGRAMS”

쐌

EL-11, “POWER SUPPLY ROUTING” for power distribution circuit

When you perform trouble diagnosis, refer to the following:

쐌

GI-25, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES”

쐌

GI-21, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

IDX

PRECAUTIONS

Precautions (Cont’d)

EC-21

Special Service Tools

NHEC1417

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.)
Tool name

Description

KV10117100
(J36471-A)
Heated oxygen sensor
wrench

NT379

Loosening or tightening heated oxygen sensors
with 22 mm (0.87 in) hexagon nut

(J44321)
Fuel pressure gauge kit

LEC642

Checking fuel pressure with pressure gauge

EG17650301
(J33984-A)
Radiator cap tester
adapter

NT564

Adapting radiator cap tester to radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

Commercial Service Tools

NHEC1418

Tool name
(Kent-Moore No.)

Description

Leak detector
ie: (J41416)

NT703

Locating the EVAP leak

EVAP service port
adapter
ie: (J41413-OBD)

NT704

Applying positive pressure through EVAP service
port

PREPARATION

Special Service Tools

EC-22

Tool name
(Kent-Moore No.)

Description

Fuel filler cap adapter
ie: (MLR-8382)

NT815

Checking fuel tank vacuum relief valve opening
pressure

Socket wrench

NT705

Removing and installing engine coolant tempera-
ture sensor

Oxygen sensor thread
cleaner
ie: (J-43897-18)
(J-43897-12)

AEM488

Reconditioning the exhaust system threads before
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: J-43897-18 18 mm diameter with pitch 1.5
mm, for Zirconia Oxygen Sensor
b: J-43897-12 12 mm diameter with pitch 1.25
mm, for Titania Oxygen Sensor

Anti-seize lubricant
ie: (Permatex

133AR

or equivalent meeting
MIL specification MIL-A-
907)

NT779

Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.

IDX

PREPARATION

Commercial Service Tools (Cont’d)

EC-23

Engine Control Component Parts Location

NHEC1419

SEC993CA

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location

EC-24

SEC994C

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EC-25

SEC995C

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EC-26

SEC996C

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EC-27

Circuit Diagram

NHEC0010

MEC346E

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram

EC-28

MEC347E

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram (Cont’d)

EC-29

System Diagram

NHEC0011

SEC389D

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Diagram

EC-30

Vacuum Hose Drawing

NHEC1420

Refer to “System Diagram”, EC-30 for Vacuum control system.

SEC895CA

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Vacuum Hose Drawing

EC-31

System Chart

NHEC0013

Input (Sensor)

ECM Function

Output (Actuator)

쐌

Camshaft position sensor (PHASE)

쐌

Mass air flow sensor

쐌

Engine coolant temperature sensor

쐌

Heated oxygen sensor 1

쐌

Ignition switch

쐌

Throttle position sensor

쐌

Accelerator pedal position sensor

쐌

Park/neutral position (PNP) switch

쐌

Air conditioner switch

쐌

Knock sensor

쐌

Intake air temperature sensor

쐌

Absolute pressure sensor

쐌

EVAP control system pressure sensor*1

쐌

Battery voltage

쐌

Power steering pressure sensor

쐌

Vehicle speed (From combination meter)

쐌

Fuel tank temperature sensor*1

쐌

Crankshaft position sensor (POS)

쐌

Heated oxygen sensor 2*2

쐌

TCM (Transmission control module)*3

쐌

Refrigerant pressure sensor

쐌

Electrical load

쐌

Fuel level sensor*1

쐌

ASCD steering switch

쐌

ASCD brake switch

쐌

Stop lamp switch

Fuel injection & mixture ratio control

Injectors

Electronic ignition system

Power transistor

Fuel pump control

Fuel pump relay

On board diagnostic system

MIL (On the instrument panel)

ASCD vehicle speed control

Electric throttle control actuator

Cooling fan control

Cooling fan relays

Power valve control

VIAS control solenoid valve

Heated oxygen sensor 1 heater control

Heated oxygen sensor 1 heater

Heated oxygen sensor 2 heater control

Heated oxygen sensor 2 heater

EVAP canister purge flow control

EVAP canister purge volume con-
trol solenoid valve

Air conditioning cut control

Air conditioner relay

ON BOARD DIAGNOSIS for EVAP system

쐌

EVAP canister vent control valve

쐌

Vacuum cut valve bypass valve

*1: This sensor is not used to control the engine system. This is used only for the on board diagnosis.
*2: This sensor is not used to control the engine system under normal conditions.
*3: This signal is sent to the ECM through CAN communication line.

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Chart

EC-32

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