2008 NISSAN LATIO spark plugs replace

TROUBLE DIAGNOSIS
EC-81
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TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000001702586
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "WORK FLOW".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW
MEF036D
SEF233G
SEF234G

DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-287
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8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm
between the edge of the spark plug and grounded metal portion
as shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
CAUTION:
• Do not approach to the spark plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.
OK or NG
OK >> GO TO 7.
NG >> Check ignition coil, power transistor and their circuits. Refer to EC-531
.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to MA-17, "
Changing Spark
Plugs".
NG >> 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded portion.
OK or NG
OK >>INSPECTION END
NG >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to MA-17, "
Changing
Spark Plugs".
9.CHECK COMPRESSION PRESSURESpark should be generated.
PBIB2325E
Spark should be generated.
SEF156I
Spark should be generated.

EC-312
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DTC P0420 THREE WAY CATALYST FUNCTION
Check the initial spark plug for fouling, etc.
OK or NG
OK >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to MA-17, "
Changing Spark
Plugs".
NG >> 1. Repair or clean spark plug.
2. GO TO 9.
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded portion.
OK or NG
OK >>INSPECTION END
NG >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to MA-17, "
Changing
Spark Plugs".
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly.
Refer to EM-33
.
Keep fuel hose and all fuel injectors connected to fuel tube.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)>>GO TO 11.
NG (Drips.)>>Replace the fuel injector(s) from which fuel is dripping.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
Trouble is fixed.>>INSPECTION END
Trouble is not fixed.>>Replace three way catalyst (manifold).
SEF156I
Spark should be generated.

MA-6
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PERIODIC MAINTENANCE
PERIODIC MAINTENANCE
Introduction of Periodic MaintenanceINFOID:0000000001704722
Two different maintenance schedules are provided, and should be used, depending upon the conditions in
which the vehicle is mainly operated. After 60,000 miles (96,000 km) or 48 months, continue the periodic
maintenance at the same mileage/time intervals.
Schedule 1INFOID:0000000001704723
Emission Control System Maintenance
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
Schedule 1Follow Periodic Maintenance Schedule 1 if your driving habits frequently includes
one or more of the following driving conditions:
• Repeated short trips of less than 5 miles (8 km).
• Repeated short trips of less than 10 miles (16 km) with outside temperatures re-
maining below freezing.
• Operating in hot weather in stop-and-go “rush hour” traffic.
• Extensive idling and/or low speed driving for long distances, such as police, taxi
or door-to-door delivery use.
• Driving in dusty conditions.
• Driving on rough, muddy, or salt spread roads.
• Towing a trailer, using a camper or a car-top carrier.Emission Control Sys-
tem MaintenanceMA-6
Chassis and Body
Maintenance
MA-6
Schedule 2Follow Periodic Maintenance Schedule 2 if none of the driving conditions shown
in Schedule 1 apply to your driving habits.Emission Control Sys-
tem MaintenanceMA-8Chassis and Body
MaintenanceMA-8
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Section -
Page or - Content Title Perform at number of
miles, kilometers or
months, whichever
comes first.Miles x 1,000
(km x 1,000)
Months3.75
(6)
37.5
(12)
611 . 2 5
(18)
915
(24)
1218.75
(30)
1522.5
(36)
1826.25
(42)
2130
(48)
24
Drive belt NOTE (1)MA-12
Air cleaner filter NOTE (2) [R]MA-14
EVAP vapor linesI*MA-18
Fuel linesI*MA-14
Fuel filter NOTE (3)—
Engine coolant NOTE (4)MA-12
Engine oil R R R R R R R RMA-15
Engine oil filter (Use
genuine oil filter or
equivalent)RRRRRRRRMA-16
Spark plugs (Iridium/
platinum-tipped type)Replace every 105,000 miles (169,000 km)MA-17
Intake and exhaust
valve clearance NOTE (5)EM-104, "Standard
and Limit"

PERIODIC MAINTENANCE
MA-7
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Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
(1) After 60,000 miles (96,000 km) or 48 months, inspect every 15,000 miles (24,000 km) or 12 months. Replace the drive belts if found
damaged.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) Maintenance-free item. For service procedures, go to the FL section.
(4) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(5) If valve noise increases, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by NISSAN for reliable vehicle operation. The owner need not perform
such maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and intervals are
required.
Chassis and Body Maintenance
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. L = Lubricate.
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Section -
Page or - Content Title Perform at number of
miles, kilometers or
months, whichever
comes first.Miles x
1,000
(km x
1,000)
Months33.75
(54)
2737.5
(60)
3041.25
(66)
3345
(72)
3648.75
(78)
3952.5
(84)
4256.25
(90)
4560
(96)
48
Drive beltNOTE
(1)I*MA-12
Air cleaner filterNOTE
(2)[R]MA-14
EVAP vapor linesI*MA-18
Fuel linesI*MA-14
Fuel filterNOTE
(3)—
Engine coolantNOTE
(4)R*MA-12
Engine oil R R R R R R R RMA-15
Engine oil filter (Use
genuine oil filter or
equivalent)R R R R RRRRMA-16
Spark plugs (Iridium/
platinum-tipped type)Replace every 105,000 miles (169,000 km)MA-17
Intake and exhaust
valve clearance NOTE
(5)EM-104
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section -
Page or -
Content Title Perform at number of
miles, kilometers or
months, whichever
comes first.Miles x
1,000
(km x
1,000)
Months3.75
(6)
37.5
(12)
611 . 2 5
(18)
915
(24)
1218.75
(30)
1522.5
(36)
1826.25
(42)
2130
(48)
24
Brake lines & cables I IMA-24
Brake pads, rotors,
drums & liningsIIIIMA-24
Manual transaxle oil or
automatic transaxle
fluidNOTE (1) I IMA-19 , MA-
22 or MA-21
CVT fluid NOTE (2) I I
Steering gear & link-
age, axle & suspen-
sion partsIIIIMA-25
, PS-
12
Tire rotation NOTE (3)WT-6
Front drive shaft boots I I I IMA-26

PERIODIC MAINTENANCE
MA-9
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(1) After 60,000 miles (96,000 km) or 48 months, inspect every 15,000 miles (24,000 km) or 12 months. Replace the drive belt if found
damaged or if the auto belt tensioner reading reaches the maximum limit.
(2) Maintenance-free item.
(3) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(4) If valve noise increases, inspect valve clearance.
Maintenance items and intervals with “*” are recommended by NISSAN for reliable vehicle operation. The owner need not perform such
maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and intervals are
required.
Chassis and Body Maintenance
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. L = Lubricate.
(1) Using transmission fluid other than Genuine NISSAN CVT Fluid NS-2 will damage the CVT, which is not covered by the NIS-
SAN new vehicle limited warranty.
(2) Refer to “Tire rotation” under the “GENERAL MAINTENANCE” heading earlier in this section. Spark plugs (Iridium/plati-
num-tipped type)Replace every 105,000 miles (169,000 km)MA-17
Intake and exhaust valve
clearance)NOTE (4)EM-104, "Sta n-
dard and Limit"
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section - Page
or - Content Ti-
tle Perform at number of miles,
kilometers or months, which-
ever comes first.Miles x
1,000
(km x
1,000)
Months7.5
(12)
615
(24)
1222.5
(36)
1830
(48)
2437.5
(60)
3045
(72)
3652.5
(84)
4260
(96)
48
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Sec-
tion - Page or -
Content Title Perform at number of miles, kilo-
meters or months, whichever
comes first.Miles x 1,000
(km x 1,000)
Months7.5
(12)
615
(24)
1222.5
(36)
1830
(48)
2437.5
(60)
3045
(72)
3652.5
(84)
4260
(96)
48
Brake lines & cables I I I IMA-24
Brake pads, rotors, drums & lin-
ings IIIIMA-24
Manual transaxle oil or automatic
transaxle fluidIIIIMA-21 or MA-22
CVT fluid NOTE (1) IIIIMA-19
Steering gear & linkage, axle &
suspension partsIIMA-25, PS-12
Tire rotation NOTE (2)MA-23
Front drive shaft boots I I I IMA-26
Exhaust system I IMA-19
In-cabin microfilter R R R RMA-19