spark plugs NISSAN TEANA 2008 Service Manual

EC-202
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
DTC LogicINFOID:0000000003856594
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio feedback signal from A/F sensor 1. The ECM calculates
the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (the actual mixture ratio is too rich), the ECM
judges the condition as the fuel injection system malfunction and illuminates the MI (2 trip detection logic).
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-18, "
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the fuel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-203, "Diagnosis Procedure".
NO >> Remove spark plugs and check for fouling, etc.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Keep engine idle for at least 10 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-203, "Diagnosis Procedure".
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds.
Sensor Input signal to ECM ECM function Actuator
A/F sensor 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)Fuel injection control Fuel injector
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0172Fuel injection system too
rich (bank 1)  Fuel injection system does not operate properly.
 The amount of mixture ratio compensation is too
large. (The mixture ratio is too rich.) A/F sensor 1
 Fuel injector
 Exhaust gas leaks
 Incorrect fuel pressure
 Mass air flow sensor P0175Fuel injection system too
rich (bank 2)

EC-212
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-136, "
Spark Plug".
NO >> Repair or clean spark plug. Then GO TO 8.
8.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.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-136, "
Spark
Plug".
9.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-22, "
Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-411, "
Inspection".
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-411, "
Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES >> Replace “fuel filter and fuel pump assembly”.
NO >> Repair or replace malfunctioning part.
12.CHECK IGNITION TIMING
Check idle speed and ignition timing.
For procedure, refer to EC-11, "
BASIC INSPECTION : Special Repair Requirement".
For specification, refer to EC-414, "
Idle Speed" and EC-414, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Follow the EC-11, "
BASIC INSPECTION : Special Repair Requirement".
13.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
SEF156I
Spark should be generated.
At idle: Approximately 350 kPa (3.50 bar, 3.57 kg/cm
2, 51 psi)

P0420, P0430 THREE WAY CATALYST FUNCTION
EC-229
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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6.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
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 (0.52 -
0.66 in) 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:
 Never place to the spark plug and the ignition coil within
50 cm (19.7 in) each other. Be careful not to get an electri-
cal shock while checking, because the electrical dis-
charge voltage becomes 20 kV or more.
 It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is a malfunc-
tioning.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 7.
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a non-malfunctioning spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Check ignition coil, power transistor and their circuit. Refer to EC-341, "
Diagnosis Procedure".
8.CHECK SPARK PLUGSpark should be generated.
JMBIA0066GB
Spark should be generated.

EC-230
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-136, "
Spark Plug".
NO >> Repair or clean spark plug. Then 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.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-136, "
Spark
Plug".
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly.
Refer to EM-44, "
Removal and Installation".
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.
Check the fuel does not drip from fuel injector.
Does fuel drip from fuel injector?
YES >> Replace the fuel injector(s) from which fuel is dripping.
NO >> GO TO 11.
11 .CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
Is the inspection result norma?
YES >> Replace three way catalyst assembly.
NO >> Repair or replace harness or connector.
SEF156I
Spark should be generated.

MA-6
< ON-VEHICLE MAINTENANCE >
PERIODIC MAINTENANCE
PERIODIC MAINTENANCE
Periodic MaintenanceINFOID:0000000003858222
The following tables show the normal maintenance schedule. Depending upon weather and atmospheric con-
ditions, varying road surfaces, individual driving habits and vehicle usage, additional or more frequent mainte-
nance may be required.
Periodic maintenance beyond the last period shown on the tables requires similar maintenance.
ENGINE AND EMISSION CONTROL MAINTENANCE
(Annual Mileage < 30,000 km/year)
Abbreviations: I = Inspect and correct or replace as necessary, R = Replace,[ ] = At the specified mileage only.
NOTE:
Maintenance items with “ ” should be performed more frequently according to “Maintenance Under Severe Driving Condi-
tions”.
(1) Periodic maintenance is not required. However, if valve noise increases, check valve clearance.
(2) Replace the drive belt if found damaged or if the auto belt tensioner reading reaches the maximum limit.
(3) Use Genuine NISSAN Engine Coolant or equivalent in its quality, in order to avoid possible aluminum corrosion within
the engine cooling system caused by the use of non-genuine engine coolant.
First replace at 90,000 Km (54,000 miles)/60 months, then every 60,000 km (36,000 miles)/48 months. Perform "I" (Checking
the mixture ratio and correcting the mixture ratio if necessary) at the middle of replacement interval.
(4) Fuel filter is maintenance-free. For service procedures, refer to FL section. MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Refer-
ence
page Perform at a kilometer (mile) interval or
month interval, whichever comes first.km x
1,000
(Miles x
1,000)
Months15
(9)
1230
(18)
2445
(27)
3660
(36)
4875
(45)
6090
(54)
72105
(63)
84120
(72)
96
Engine compartment and under vehicle
Intake and exhaust valve clearanceSee
NOTE
(1)EM-17
Drive beltSee
NOTE
(2)I I IIIIIIMA-13
Engine oil (Use recommended oil.)R R RRRRRRMA-18
Engine oil filter (Use genuine NISSAN
engine oil filter or equivalent)R R RRRRRRMA-19
Engine coolant (Use Genuine NISSAN
Engine Coolant or equivalent in its quali-
ty.)See
NOTE
(3)IMA-14
Cooling system I I IIIIIIMA-13
,
MA-17
,
MA-17
Fuel and EVAP vapor lines I I I IMA-18,
MA-22
Air cleaner filterRRMA-18
Positive crankcase ventilation (PSV)
systemIIIIMA-21
Fuel filter (In-tank type)See
NOTE
(4)—
Spark plugs (Iridium-tipped type)See
NOTE
(5)[R] [R] [R] [R] [R] [R] [R] [R]MA-20

PERIODIC MAINTENANCE
MA-9
< ON-VEHICLE MAINTENANCE >
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NOTE:
Maintenance items with “ ” should be performed more frequently according to “Maintenance Under Severe Driving Condi-
tions”.
(1) Periodic maintenance is not required. However, if valve noise increases, check valve clearance.
(2) Replace the drive belt if found damaged or if the auto belt tensioner reading reaches the maximum limit.
(3) Use Genuine NISSAN Engine Coolant or equivalent in its quality, in order to avoid possible aluminum corrosion within
the engine cooling system caused by the use of non-genuine coolant.
First replace at 90,000 km (54,000 miles), then every 60,000 km (36,000 miles). Perform "I" (Checking the mixture ratio and
correcting the mixture ratio if necessary) at the middle of replacement interval.
(4) Fuel filter is maintenance-free. For service procedures, refer to FL section.
(5) Replace spark plug when the spark plug gap exceeds 1.4 mm (0.055 in) even if within specified periodic replacement
mileage.
CHASSIS AND BODY MAINTENANCE
(Annual Mileage > 30,000 km/year)
Abbreviations: I = Inspect and correct or replace as necessary, R = Replace, L = Lubricate.
Fuel and EVAP vapor lines I IMA-18,
MA-22
Air cleaner filterRRMA-18
Fuel filter (In-tank type)See
NOTE (4)—
Positive crankcase ventilation (PCV) system I I I IMA-21
Spark-plugs (Iridium-tipped type)See
NOTE (5)R R RRRRRRMA-20
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Refer-
ence
page Perform at number of kilometers (miles) basis
only.km x
1,000
(Miles x
1,000)15
(9)30
(18)45
(27)60
(36)75
(45)90
(54)105
(63)120
(72)
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
page Perform at number of kilometers (miles)
basis only.km x 1,000
(Miles x
1,000)15
(9)30
(18)45
(27)60
(36)75
(45)90
(54)105
(63)120
(72)
Underhood and under vehicle
Headlamp aiming I I I IMA-23
,
MA-27
Brake system and fluid (For level &
leaks)IIIIMA-38,
MA-37

Brake fluidRRMA-38
Brake booster vacuum hoses, connec-
tions & check valveIIBR-12
Power steering fluid & lines (For level &
leaks)IIIIMA-40
CVT fluid (For level & leaks)See
NOTE (1)IIIIMA-32,
MA-34
Steering gear & linkage, axle & suspen-
sion parts, & front drive shafts IIMA-39,
MA-40
,
MA-41
Exhaust systemIIMA-32
Brake pads, rotors & other brake com-
ponentsIIIIMA-38,
BR-13
,
BR-15
Foot brake & parking brake (For free
play, stroke & operation)IIIIBR-6,
PB-2