check engine NISSAN LATIO 2009 Service Repair Manual

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• With the engine running, check exhaust tube
joints for exhaust leakage and unusual noise.
• Check to ensure that brackets and mounting rubbers are installed properly and free from undue stress. Improper installation could result in excessive noise and vibration.

Precaution for Fuel
(Unleaded Regular Gasoline Recommended) " .
• Before removing fuel line parts, perform the following procedures:
- Release fuel pressure from the fuel lines. Refer to EC-574, " Fuel Pressure Check " .
- Disconnect the battery ground cable.
• Always replace O-rings and clamps with new ones.
• Do not kink or twist tubes when they are being installed.
• Perform work on level surface.
• Do not tighten hose clamps excessi vely to avoid damaging hoses.
• After connecting fuel tube quick connect ors, make sure quick connectors are secure.
Ensure that connector and resin tube do not contact any adjacent parts.
• After installing tubes, make sure there is no fuel leakage at connections in the following steps.
- Apply fuel pressure to fuel lines by turning ignition switch ON (without starting the engine). Then
check for fuel leaks at the fuel tube connections.
- Start engine and rev it up and check for fuel leaks at connections.
• Use only a genuine NISSAN fuel filler cap as a replacemen t. If an incorrect fuel filler cap is used, the
MIL may come on.
• For servicing “Evaporative Emi ssion System” parts, refer to EC-527 .
• For servicing "On Board Refueling Vapo r Recovery (ORVR)" parts, refer to EC-533 .

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1. Check connections for damage or foreign material.
2. Align the matching quick connector (A) with the center of EVAP hose (1), and insert quick connector (A) straight until it clicks.
3. After connecting, pull on quick connector (A) and EVAP hose (1) by hand. Make sure connections are secure.
INSPECTION AFTER INSTALLATION Use the following procedure to check for fuel leaks.
1. Turn ignition switch “ON” (without starting the engi ne), to check the connections for fuel leaks with the
electric fuel pump applying pressure to the fuel piping.
2. Start the engine and let it idle to check that ther e are no fuel leaks at the fuel system connections.

PRECAUTIONS
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5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Precaution for Procedur e without Cowl Top Cover INFOID:0000000004305858
When performing the procedure after removing cowl top cover, cover
the lower end of windshield.
Cautions INFOID:0000000004305859
• When installing rubber bushings, the final tightening mu st be carried out under unladen conditions with tires
on ground. Oil might shorten the life of rubber bushings. Be sure to wipe off any spilled oil.
- Unladen conditions mean that fuel, engine coolant and l ubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.
• After servicing suspension parts, be sure to check wheel alignment.
• Self-lock nuts are not reusable. A lways use new ones when installing. WEIA0178E

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CONTENTS
GENERAL INFORMATION
SERVICE INFORMATION .. ..........................2
PRECAUTIONS .............................................. .....2
Description .......................................................... ......2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary fo r Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
General Precaution ............................................. ......3
Precaution for Three Way Catalyst ..................... ......4
Precaution for Fuel (Unleaded Regular Gasoline
Recommended) ................................................... ......
4
Precaution for Multiport Fuel Injection System or
Engine Control System ....................................... ......
5
Precaution for Hoses ........................................... ......5
Precaution for Engine Oils .................................. ......6
Precaution for Air Conditioning ........................... ......6
HOW TO USE THIS MANUAL ....................... .....7
Description .......................................................... ......7
Terms .................................................................. ......7
Units .................................................................... ......7
Contents .............................................................. ......7
Relation between Illustrations and Descriptions . ......8
Component .......................................................... ......8
How to Follow Trouble Diagnosis ........................ ......9
How to Read Wiring Diagr am ..................................13
Abbreviations ...................................................... ....20
SERVICE INFORMATION FOR ELECTRICAL
INCIDENT ....................................................... ....
22
How to Check Terminal ...........................................22 How to Perform Efficient Diagnosis for an Electri-
cal Incident .......................................................... ....
25
Control Units and Electrical Parts ........................ ....32
CONSULT-III CHECKING SYSTEM ................. 35
Description ........................................................... ....35
Function and System Application ........................ ....35
CONSULT-III Data Link Connector (DLC) Circuit ....36
LIFTING POINT ................................................. 38
Special Service Tool ............................................ ....38
Garage Jack and Safety Stand and 2-Pole Lift ... ....38
Board-On Lift ....................................................... ....39
TOW TRUCK TOWING ..................................... 40
Tow Truck Towing ............................................... ....40
Vehicle Recovery (Freeing a Stuck Vehicle) ....... ....40
TIGHTENING TORQUE OF STANDARD
BOLTS ............................................................... 41
Tightening Torque Table ..................................... ....41
RECOMMENDED CHEMICAL PRODUCTS
AND SEALANTS ............................................... 42
Recommended Chemical Product and Sealant ... ....42
IDENTIFICATION INFORMATION .................... 43
Model Variation .................................................... ....43
Dimensions .......................................................... ....46
Wheels & Tires .................................................... ....46
TERMINOLOGY ................................................ 47
SAE J1930 Terminology List ............................... ....47

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2. Use the Intelligent Key or mechanical key to turn the ignition switch to the
″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
General Precaution INFOID:0000000004307347
• Do not operate the engine for an extended period of time without proper exhaust ventilation.
Keep the work area well ventilated and free of any flammable
materials. Special care should be taken when handling any flam-
mable or poisonous materials, such as gasoline, refrigerant gas,
etc. When working in a pit or ot her enclosed area, be sure to prop-
erly ventilate the area before working with hazardous materials.
Do not smoke while working on the vehicle.
• Before jacking up the vehicle, apply wheel chocks or other tire blocks to the wheels to prevent t he vehicle from moving. After jack-
ing up the vehicle, support the vehicle weight with safety stands at
the points designated for proper lifting before working on the vehi-
cle.
These operations should be done on a level surface.
• When removing a heavy component such as the engine or tran-
saxle/transmission, be careful not to lose your balance and drop
them. Also, do not allow them to strike adjacent parts, especially
the brake tubes and master cylinder.
• Before starting repairs which do not require battery power: Turn off ignition switch.
Disconnect the negative battery terminal.
• If the battery terminals are disconnected, recorded memory of
radio and each control unit is erased.
• Battery posts, terminals and related accessories contain lead and lead compounds. Wash hands after handling.
• To prevent serious burns: Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.
• Dispose of or recycle drained oil or the solvent used for cleaning
parts in an appropriate manner.
• Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray
and possibly a fire.
• Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly. SGI231
SGI233

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PRECAUTIONS
• Replace oil seals, gaskets, packings, O-rings, locking wa shers, cotter pins, self-locking nuts, etc. with new
ones.
• Replace inner and outer races of tapered roller bearings and needle bearings as a set.
• Arrange the disassembled parts in accordance with their assembled locations and sequence.
• Do not touch the terminals of electrical com ponents which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.
• After disconnecting vacuum or air hoses, atta ch a tag to indicate the proper connection.
• Use only the fluids and lubricants specified in this manual.
• Use approved bonding agent, sealants or their equivalents when required.
• Use hand tools, power tools (disassembly only) and recommended
special tools where specified for safe and efficient service repairs.
• When repairing the fuel, oil, water, vacuum or exhaust systems, check all affected lines for leaks.
• Before servicing the vehicle: Protect fenders, upholstery and carpeting with appropriate covers.
Take caution that keys, buckles or buttons do not scratch paint.
WARNING:
To prevent ECM from storing the diagnostic tro uble codes, do not carelessly disconnect the harness
connectors which are related to the engine cont rol system and TCM (transmission control module)
system. The connectors should be disconnected on ly when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC, CVT, and AT sections.
Precaution for Three Way Catalyst INFOID:0000000004307348
If a large amount of unburned fuel flows into the catalyst , the catalyst temperature will be excessively high. To
prevent this, follow the instructions.
• Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.
• When checking for ignition spark or measuring engine compression, make tests quickly and only when nec-
essary.
• Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to the
catalyst.
Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.
Precaution for Fuel (Unleade d Regular Gasoline Recommended) INFOID:0000000004307349
Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research
octane number 91).
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85% fuel ethanol, 15% unl eaded gasoline) unless the vehicle is specifically designed for E-85 fuel PBIC0190E
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CONSULT-III CHECKING SYSTEM
Description INFOID:0000000004307366
• CONSULT-III is a hand-held type tester. When it is connected with a diagnostic connector equipped on the vehicle side, it will communicate with the contro l unit equipped in the vehicle and then enable various kinds
of diagnostic tests.
• Refer to CONSULT-III Operator's Manual for more information.
Function and System Application INFOID:0000000004307367
x: Applicable.
*1: If equipped.
*2: With automatic transmission (A/T).
*3: With continuously variable transmission (CVT).
*4: With security card installed. Diagnostic test mode FunctionENGINE
ABS* 1
AIR BAG EPS
IPDM E/R BCM
METER/M&A
INTELLIGENT KEY* 1
TRANSMISSION* 2
TRANSMISSION* 3
Work support This mode enables a technician to adjust some devices faster and
more accurately by following indications on CONSULT-III. x - - - - x - x x x
Self-diagnostic results Self-diagnostic results can be read and erased quickly. x x x x x x x x x x
Trouble diagnostic record Current self-diagnostic results and all trouble diagnostic records
previously stored can be read. - - x - - - - - - -
Data monitor Input/Output data in the ECU can be read. x x x x x x x x x x
CAN diagnostic support
monitor The communication condition of CAN communication line can be
read. x x - x x x x x x x
Calibration data* 2
Shows unit calibration IDs, offsets and gains. This data is stored in
the ECU memory. - - - - - - - - - x
Active test Diagnostic Test Mode in which CONSULT-III drives actuators apart
from ECU shifting some parameters in a specified range. x x - - x x - x - -
Function test This mode can show results of self-diagnosis of ECU with either
"OK" or "NG". For engines, more practical tests regarding sensors/
switches and/or actuators are available. x x x - - - - - x x
DTC & SRT confirmation The results of SRT (System Readiness Test) and the self-diagno-
sis status/result can be confirmed. x - - - - - - - x -
DTC work support The operating condition to confirm Diagnosis Trouble Codes can
be selected. x - - - - - - - x -
ECM/ECU part number ECM/ECU part number can be read. x x - x - x - x x x
ECU discriminated No. Classification number of a replacement ECU can be read to pre-
vent an incorrect ECU from being installed. - - x - - - - - - -
Passenger airbag Displays the STATUS (readiness) of front passenger air bag. - - x - - - - - - -
Configuration Sets control module parameters to match vehicle options. - - - - - x - - - -
Control unit initialization *4
All registered ignition key IDs in NATS components can be initial-
ized and new IDs can be registered. - - - - - x - - - -
PIN Read *4
This mode enables technician to get BCM-specific 5-digit code. - - - - - x - - - -

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If the noise can be duplicated easily during the test drive,
to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half- clutch on M/T model, drive position on A/T model).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
• Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
• If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the vehicle body.
CHECK RELATED SERVICE BULLETINS After verifying the customer concern or symptom, che ck ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE 1. Narrow down the noise to a general area.To help pinpoint the source of the noise, use a listening tool (Chassis Ear: J-39570, Engine Ear: J-39565 and mechanic's stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
• removing the components in the area that you suspect the noise is coming from. Do not use too much force when removing clips and fasteners, otherwise clips and fasteners can be broken
or lost during the repair, resulting in the creation of new noise.
• tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
• feeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing the
noise.
• placing a piece of paper between components that you suspect are causing the noise.
• looking for loose components and contact marks. Refer to GW-8, " Generic Squeak and Rattle Troubleshooting " .
REPAIR THE CAUSE • If the cause is a loose component, tighten the component securely.
• If the cause is insufficient clearance between components:
- separate components by repositioning or loos ening and retightening the component, if possible.
- insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or urethane tape. A NISSAN Squeak and Rattle Kit (J-43980) is av ailable through your authorized NISSAN Parts Depart-
ment.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISS AN Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 ×135 mm (3.94 ×5.31 in)/76884-71L01: 60 ×85 mm (2.36 ×3.35 in)/76884-71L02: 15 ×25
mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 ×50 mm (1.97 ×1.97 in)/73982-50Y00: 10 mm (0.39 in) thick,
50 ×50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 ×50 mm (1.18 ×1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occu r. Ideal for instrument panel applications.
68370-4B000: 15 ×25 mm (0.59 ×0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll. The following
materials not found in the kit can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Insulates where slight movement is present. Ideal for instrument panel applications.

PRECAUTIONS
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PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004498345
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIRBAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, 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/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
• Never use electrical test equipment on any circuit re lated to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identifi ed by yellow and/or orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precautions for Trouble Diagnosis INFOID:0000000004306699
CAUTION:
• Never apply 7.0 V or more to the measurement terminal.
• Use a tester with open terminal voltage of 7.0 V or less.
• Turn the ignition switch OFF and disconnect th e battery cable from the negative terminal when
checking the harness.
Precautions for Harness Repair INFOID:0000000004306700
• Solder the repaired area and wrap tape around the soldered area. NOTE:
A fray of twisted lines must be within 110 mm (4.33 in). SKIB8766E