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
1
X
P2138
2138
APP SENSOR
1
X
*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.
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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
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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”
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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
TM
133AR
or equivalent meeting
MIL specification MIL-A-
907)
NT779
Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
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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
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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
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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
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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
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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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