Page 977 of 3051
DTC*1
P0720 VEHSP DSEN/CI RAT AT-84
P0725 ENGINESPEE DSIG AT-90
Alphabetical & P No. Index for DTC (Cont'd)
Page 978 of 3051
DTC*1
P1778 STEPMOT RFNC AT-117
P1791 LINEPRES SSEN AT-119
*1 :Thes enumber sar eprescribe dby IS O 15031-6 .1s ttri p DT CNo .is th e sam eas DT CNo.
Items
Alphabetical & P No. Index for DTC (Cont'd)
Page 979 of 3051

*4: The MI illuminates when the ªRevolution sensor signalº and the ªVehicle speed sensor signalº meet the fail-safe condition at the
same time.
*5: While engine is running.
*6: 1st trip DTC No. is the same as DTC No.
P No. Index for DTCNLEC1330S0202
DTC*6
Items
(CONSULT-II screen terms)Reference page
CONSULT-II*2 ECM*1
Ð Ð Unable to access ECM EC-647
Ð Flashing*5NO DTC IS DETECTED.
FURTHER TESTING MAYBE REQUIRED.EC-598
Ð 0000NO DTC IS DETECTED.
FURTHER TESTING MAYBE REQUIRED.Ð
P0100 0100 MAF SEN/CIRCUIT*3 EC-679
P0115 0115 COOLANT T SEN/CIRC*3 EC-694
P0120 0120 THRTL POS SEN/CIRC*3 EC-700
P0130 0130 HO2S1 (B1) EC-709
P0325 0325 KNOCK SEN/CIRC-B1 EC-815
P0340 0340 CMP SEN/CIRCUIT EC-825
P0403 0403 EGR VOL CON/V CIR (where fitted) EC-841
P0500 0500 VEH SPEED SEN/CIRC*4 EC-858
P0510 0510 CLOSED TP SW/CIRC EC-872
P1217 1217 ENG OVER TEMP EC-882
P1320 1320 IGN SIGNAL-PRIMARY EC-900
P1610 - 1615 Ð NATS MALFUNCTION EL-334
*1: In Diagnostic Test Mode II (Self-diagnostic results). These numbers are controlled by NISSAN.
*2: These numbers are prescribed by ISO 15031-6
*3: When the fail-safe operation occurs, the MI illuminates.
*4: The MI illuminates when the ªRevolution sensor signalº and the ªVehicle speed sensor signalº meet the fail-safe condition at the
same time.
*5: While engine is running.
*6: 1st trip DTC No. is the same as DTC No.
TROUBLE DIAGNOSIS Ð INDEXSR20DE
Alphabetical & P No. Index for DTC (Cont'd)
EC-554
Page 980 of 3051

Precautions for Supplemental Restraint System
(SRS) ªAIR BAGº and ªSEAT BELT
PRE-TENSIONERº
NLEC1745The Supplemental Restraint System ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº, used along with a seat
belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The
Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and
on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning
lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used along
with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side col-
lision. The supplemental side air bag consists of air bag modules (located in the outer side of front seats),
satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal collision),
wiring harness, warning lamp (one of components of supplemental air bags for a frontal collision). Information
necessary to service the system safely is included in theRS sectionof 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 must be performed
by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
+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 with yellow harness connector (and with
yellow harness protector or yellow insulation tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of Engine and CVT
NLEC1332The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
+Be sure to turn the ignition switch ªOFFº 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 MI to light up.
+Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
+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 section, ªDescriptionº, ªHARNESS CONNEC-
TORº.
+Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MI to light up due to the short circuit.
+Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of fuel injection system, etc.
+Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission Control Module) before returning the vehicle to the customer.
PRECAUTIONSSR20DE
Precautions for Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
EC-555
Page 981 of 3051

SEF706Y
Engine Fuel & Emission Control System=NLEC1333+Always use a 12 volt battery as power source.
+Do not attempt to disconnect battery cables while engine
is running.
+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.
SEF707Y
+Do not disassemble ECM.
+If a battery terminal is disconnected, the memory will
return to the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is
disconnected. However, this is not an indication of a prob-
lem. Do not replace parts because of a slight variation.
SEF908W
+When connecting or disconnecting ECM harness
connector, use lever as shown.
When connecting, fasten connector securely with lever
moved until it stops.
SEF291H
+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 terminals when connecting pin connectors.
+Securely connect ECM harness connectors.
A Poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.
+Keep ECM harness at least 10 cm (4 in) away from adja-
cent harness, to prevent an ECM system malfunctions due
to receiving external noise, degraded operation of ICs, etc.
+Keep ECM parts and harness dry.
PRECAUTIONSSR20DE
Engine Fuel & Emission Control System
EC-556
Page 982 of 3051

MEF040D
+Handle mass air flow sensor carefully to avoid damage.
+Do not disassemble mass air flow sensor.
+Do not clean mass air flow sensor with any type of deter-
gent.
+Do not disassemble IAC valve-AAC valve.
+Even a slight leak in the air intake system can cause seri-
ous problems.
+Do not shock or jar the camshaft position sensor and
crankshaft position sensor.
+Before replacing ECM, perform refer to ªECM Terminals
and Reference Valueº inspection and make sure ECM
functions properly, EC-657.
SAT652J
+After performing each TROUBLE DIAGNOSIS, perform
ªDTC Confirmation Procedureº or ªOverall Function
Checkº.
The DTC should not be displayed in the ªDTC Confirma-
tion Procedureº if the repair is completed. The ªOverall
Function Checkº should be a good result if the repair is
completed.
SEF348N
+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.
+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 ECM terminals,
such as the ground.
PRECAUTIONSSR20DE
Engine Fuel & Emission Control System (Cont'd)
EC-557
Page 983 of 3051
SEF605X
SEF709Y
SEF708Y
Engine Fuel & Emission Control System (Cont'd)
Page 984 of 3051
Special Service ToolsNLEC1335
Tool number
Tool nameDescription
KV10117100
Heated oxygen sensor
wrench
NT379
Loosening or tightening heated oxygen sensor 1
(front) with 22 mm hexagon nut
KV10114400
Heated oxygen sensor
wrench
NT636
Loosening or tightening heated oxygen sensor 2
(rear)
a: 22 mm
Commercial Service ToolsNLEC1336
Tool name Description
Fuel filler cap adapter
NT653
Checking fuel tank vacuum relief valve opening
pressure
Oxygen sensor thread
cleaner
NT778
Reconditioning the exhaust system threads before
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: 18 mm dia. with pitch 1.5 mm, for Zirconia
Oxygen Sensor
b: 12 mm dia. with pitch 1.25 mm, for Titania
Oxygen Sensor
Anti-seize lubricant (Per-
matex
TM133AR or
equivalent meeting MIL
specification MIL-A-907)
NT779
Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
PREPARATIONSR20DE
Special Service Tools
EC-559