2001 NISSAN ALMERA N16 Idling valve

NJEM0005
NVH Troubleshooting Ð Engine NoiseNJEM0005S01Use the chart below to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
Location of
noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemReference
page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
To p o f
Engine
Rocket
Cover Cyl-
inder HeadTicking or
clickC A Ð A B Ð Tappet
noise+Valve clearance EM-42
Rattle C A Ð A B C Camshaft
bearing
noise+Camshaft journal
clearance
+Camshaft runoutEM-37
Crankshaft
Pulley
Cylinder
block (Side
of Engine)
Oil panSlap or
knockÐ A Ð B B Ð Piston pin
noise+Piston and piston pin
clearance
+Connecting rod bush-
ing clearanceEM-54, 59
Slap or
rapA Ð Ð B B A Piston slap
noise+Piston-to-bore clear-
ance
+Piston ring side clear-
ance
+Piston ring end gap
+Connecting rod bend
and torsionEM-54, 55,
56
Knock A B CB B B Connecting
rod-bearing
noise+Connecting rod bear-
ing clearance (Big
end)
+Connecting rod bush-
ing clearance (Small
end)EM-58, 59
Knock A B Ð A B C Main bear-
ing noise+Main bearing oil clear-
ance
+Crankshaft runoutEM-57
Front of
Engine Tim-
ing Chain
CoverTapping or
tickingAAÐBBBTiming
chain and
chain ten-
sioner noise+Timing chain cracks
and wear
+Timing chain tensioner
operationEM-26
Front of
EngineSqueak or
fizzingA B Ð B Ð C Other drive
belts (stick-
ing or slip-
ping)+Drive belts deflection EM-15
CreakingABABABOther drive
belts (slip-
ping)+Idler pulley bearing
operation
Squall or
creakABÐBABWater pump
noise+Water pump operation LC-14
A: Closely related B: Related C: Sometimes related Ð: Not related
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGQG
NVH Troubleshooting Ð Engine Noise
EM-9

NJEM0051
NVH Troubleshooting Ð Engine NoiseNJEM0051S01Use the chart below to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
Location of
noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemReference
page Before
warm-upAfter
warm-upWhen
startingWhen
idlingWhen
racingWhile
driving
To p o f
engine
Rocker
cover
Cylinder
headTicking or
clickingC AÐA BÐTappet
noise+Valve clearance EM-133
Rattle C A Ð A B CCamshaft
bearing
noise+Camshaft journal
clearance
+Camshaft runoutEM-122,
122
Crankshaft
pulley
Cylinder
block
(Side of
engine)
Oil panSlap or
knockÐAÐB BÐPiston pin
noise+Piston and piston
pin clearance
+Connecting rod
bushing clearanceEM-144,
152
Slap or
rapAÐÐB B APiston slap
noise+Piston-to-bore
clearance
+Piston ring side
clearance
+Piston ring end
gap
+Connecting rod
bend and torsionEM-144,
145, 145,
146
Knock A B C B B BConnect-
ing rod
bearing
noise+Connecting rod
bushing clearance
(Small end)
+Connecting rod
bearing clearance
(Big end)EM-152,
150
Knock A B Ð A B CMain bear-
ing noise+Main bearing oil
clearance
+Crankshaft runoutEM-148,
148
Front of
engine
Timing
chain
coverTapping or
tickingAAÐBBBTiming
chain and
chain ten-
sioner
noise+Timing chain
cracks and wear
+Timing chain ten-
sioner operationEM-95, 93
Front of
engineSqueaking
or fizzingA BÐBÐCOther
drive belts
(Sticking
or slipping)+Drive belts deflec-
tion
EM-84
CreakingABABABOther
drive belts
(Slipping)+Idler pulley bearing
operation
Squall
CreakABÐBABWater
pump
noise+Water pump opera-
tionLC-39
A: Closely related B: Related C: Sometimes related Ð: Not related
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGYD
NVH Troubleshooting Ð Engine Noise
EM-81

EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow
rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as
the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and
idling.
SEF917W
INSPECTIONNJEC0019EVAP CanisterNJEC0019S01Check EVAP canister as follows:
1. Block port B. Orally blow air through port A. Check that air
flows freely through port C with check valve resistance.
2. Block port A. Orally blow air through port B. Check that air
flows freely through port C.
SEF918W
SEF943S
Fuel Tank Vacuum Relief Valve (Built into fuel filler cap)NJEC0019S031. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
Pressure:
16.0 - 20.0 kPa (0.16 - 0.20 bar, 0.163 - 0.204 kg/cm
2,
2.32 - 2.90 psi)
Vacuum:
þ6.0 to þ3.5 kPa (þ0.060 to þ0.035 bar, þ0.061 to
þ0.036 kg/cm
2, þ0.87 to þ0.51 psi)
3. If out of specification, replace fuel filler cap as an assembly.
Evaporative Emission (EVAP) Canister Purge Volume
Control Solenoid Valve
NJEC0019S07Refer to EC-308.
Checking EVAP Vapour LinesNJEC0019S131. Visually inspect vapor lines for leaks, cracks, damage, loose
connections, chafing and deterioration.
2. Inspect vacuum relief valve of fuel tank filler cap for clogging,
sticking, etc. Refer to next page.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONQG
Evaporative Emission System (Cont'd)
EC-34

Fail-safe Chart=NJEC0040The ECM enters fail-safe mode if any of the following malfunctions is detected due to the open or short cir-
cuit. When the ECM enters the fail-safe mode, the MI illuminates.
DTC No.
Detected items Engine operating condition in fail-safe mode CON-
SULT-II
GSTECM*1
P0100 0100 Mass air flow sensor
circuitEngine speed will not rise more than 2,400 rpm due to the fuel cut.
P0115 0115 Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time
after turning ignition switch ªONº or ªSTARTº.
CONSULT-II displays the engine coolant temperature decided by ECM.
The radiator fan operates.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned
ON or Start40ÉC (104ÉF)
More than approx. 4 minutes
after ignition ON or Start80ÉC (176ÉF)
Except as shown above40 - 80ÉC (104 - 176ÉF)
(Depends on the time)
P0120 0120 Throttle position sensor
circuitThrottle position will be determined based on the injected fuel amount and
the engine speed. Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
Unable to
access
ECMUnable to
access
Diagnostic
Test Mode
IIECMECM fail-safe activating condition
The computing function of the ECM was judged to be malfunctioning.
When the fail-safe system activates (i.e., if the ECM detects a malfunction
condition in the CPU of ECM), the MI on the instrument panel lights to warn
the driver.
However it is not possible to access ECM and DTC cannot be confirmed.
Engine control with fail-safe
When ECM fail-safe is operating, fuel injection, ignition timing, fuel pump
operation and IACV-AAC valve operation are controlled under certain limita-
tions.
ECM fail-safe operation
Engine speedEngine speed will not rise more than
3,000 rpm
Fuel injectionSimultaneous multiport fuel injection sys-
tem
Ignition timing Ignition timing is fixed at the preset value
Fuel pumpFuel pump relay is ªONº when engine is
running and ªOFFº when engine stalls
IACV-AAC valve Full open
Cooling fansCooling fan relay ªONº (High speed condi-
tion) when engine is running, and ªOFFº
when engine stalls.
Replace ECM, if ECM fail-safe condition is confirmed.
*: In Diagnostic Test Mode II (Self-diagnostic results) (If so equipped)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Fail-safe Chart
EC-123

Symptom Matrix ChartNJEC0041SYSTEM Ð ENGINE CONTROL SYSTEMNJEC0041S01
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit11232 22 3 2EC-464
Fuel pressure regulator sys-
tem334444444 4EC-39
Injector circuit11232 22 2EC-447
Evaporative emission sys-
tem334444444 4EC-33
Air Positive crankcase ventila-
tion system334444444 41EC-37
Incorrect idle speed adjust-
ment3 3 1 1 1 1 1 EC-41
IACV-AAC valve circuit112332222 2 2EC-313
Ignition Incorrect ignition timing
adjustment33111 11 1EC-41
Ignition circuit11222 22 2EC-451
EGR EGR volume control valve
circuit2233 3EC-293
EGR system212333223 3EC-285,
293, 353
Main power supply and ground circuit22333 33 23 2EC-145
Air conditioner circuit223333333 3 2HAsection
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Symptom Matrix Chart
EC-124

SYSTEM Ð ENGINE MECHANICAL & OTHERNJEC0041S03
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank
5
5FE section
Fuel piping 5 5 5 5 5 5
Ð Vapor lock
Valve deposit
5 555 55 5
Poor fuel (Heavy weight
gasoline, Low octane)
Air Air duct
55555 5 Air cleaner
Air leakage from air duct
(Mass air flow sensor Ð
throttle body)
5555
Throttle body, Throttle wireFE section
Air leakage from intake
manifold/Collector/GasketÐ
Cranking Battery
111111 11
EL section Alternator circuit
Starter circuit 3
Flywheel/drive plate 6EM section
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Symptom Matrix Chart (Cont'd)
EC-126

SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Engine Cylinder head
55555 55 5
EM section Cylinder head gasket 4 3
Cylinder block
66666 66 64 Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Valve
mecha-
nismTiming chain
55555 55 5 EMsection Camshaft
Intake valve
3
Exhaust valve
Exhaust Exhaust manifold/Tube/
Muffler/Gasket
55555 55 5 FEsection
Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil
pump/Oil filter/Oil gallery
55555 55 5MA, EM and
LC sections
Oil level (Low)/Filthy oil
LC section Cooling Radiator/Hose/Radiator filler
cap
55555 55 45 Thermostat 5
Water pump
Water gallery
Cooling fan 5 EC-334
Coolant level (low)/
Contaminated coolantMA section
1 - 6: The numbers refer to the order of inspection.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Symptom Matrix Chart (Cont'd)
EC-127

4 CHECK FUEL PRESSURE
1. Release fuel pressure to zero.
Refer to EC-38.
2. Install fuel pressure gauge and check fuel pressure.
At idling:
When fuel pressure regulator valve vacuum hose is connected.
235 kPa (2.35 bar, 2.4 kg/cm
2, 34 psi)
When fuel pressure regulator valve vacuum hose is disconnected.
294 kPa (2.94 bar, 3.0 kg/cm
2, 43 psi)
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Fuel pump and circuit (Refer to EC-464.)
+Fuel pressure regulator (Refer to EC-39.)
+Fuel lines (Refer to ªENGINE MAINTENANCEº in MA section.)
+Fuel filter for clogging
©Repair or replace.
6 CHECK MASS AIR FLOW SENSOR
With CONSULT-II
Check ªMASS AIR FLOWº in ªDATA MONITORº mode with CONSULT-II.
at idling: 1.0 - 4.0 g´m/sec
at 2,500 rpm: 5.0 - 10.0 g´m/sec
With GST
Check mass air flow sensor signal in MODE 1 with GST.
at idling: 1.0 - 4.0 g´m/sec
at 2,500 rpm: 5.0 - 10.0 g´m/sec
OK or NG
OK©GO TO 7.
NG©Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-152.
DTC P0171 FUEL INJECTION SYSTEM FUNCTION (LEAN SIDE)QG
Diagnostic Procedure (Cont'd)
EC-252