NISSAN ALMERA TINO 2001 Service Repair Manual

6 CHECK FUNCTION OF INJECTORS
With CONSULT-II
1. Install all parts removed.
2. Start engine.
3. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
SEF190Y
4. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Install all parts removed.
2. Start engine.
3. Listen to each injector operating sound.
MEC703B
Clicking noise should be heard.
OK or NG
OK©GO TO 7.
NG©Perform trouble diagnosis for ªINJECTORSº, EC-1021.
7 REMOVE INJECTOR
1. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
2. Turn ignition switch ªOFFº.
3. Remove injector assembly. Refer to EC-578.
Keep fuel hose and all injectors connected to injector gallery.
©GO TO 8.
8 CHECK INJECTOR
1. Disconnect all injector harness connectors.
2. Disconnect all ignition wires.
3. Prepare pans or saucers under each injectors.
4. Crank engine for about 3 seconds.
Make sure fuel does not drip from injector.
OK or NG
OK (Does not drip)©GO TO 9.
NG (Drips)©Replace the injectors from which fuel is dripping. Always replace O-ring with new one.
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
(RICH SIDE)
SR20DE
Diagnostic Procedure (Cont'd)
EC-806

9 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
(RICH SIDE)
SR20DE
Diagnostic Procedure (Cont'd)
EC-807

On Board Diagnosis LogicNLEC1752When a misfire occurs, engine speed will fluctuate (vary). If the engine speed fluctuates enough to cause the
CKP sensor to vary, ECM can detect a misfire.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (OBD) Engine speed On board diagnosis of misfire
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the first rip that a misfire condition occurs that can damage the three way catalyst (TWC) due to
overheating, the MI will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor (OBD) signal every 200 engine revo-
lutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MI will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MI will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MI will remain on.
If another misfire condition occurs that can damage the TWC, the MI will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not cause damage to the TWC (but will affect vehicle emissions), the MI
will only light when the misfire is detected on a second trip. During this condition, the ECM monitors the
CKP sensor (OBD) signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on-multiple cylinders.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0300+Multiple cylinders misfire.+Improper spark plug
+Insufficient compression
+Incorrect fuel pressure
+EGR volume control valve
+The injector circuit is open or shorted
+Injectors
+Intake air leak
+The ignition secondary circuit is open or shorted
+Lack of fuel
+Drive plate
+Heated oxygen sensor 1 (front)
+Incorrect distributor roter P0301+No. 1 cylinder misfires.
P0302+No. 2 cylinder misfires.
P0303+No. 3 cylinder misfires.
P0304+No. 4 cylinder misfires.
SEF058Y
DTC Confirmation ProcedureNLEC1522CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 10 seconds
before conducting the next test.
With CONSULT-II
1) Turn ignition switch ªONº, and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and warm it up to normal operating temperature.
3) Turn ignition switch ªOFFº and wait at least 10 seconds.
4) Start engine again and drive at 1,500 - 3,000 rpm for at least
3 minutes.
Hold the accelerator pedal as steady as possible.
NOTE:
Refer to the freeze frame data for the test driving conditions.
5) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-809.
With GST
Follow the procedure ªWith CONSULT-IIº above.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
On Board Diagnosis Logic
EC-808

Diagnostic ProcedureNLEC1523
1 CHECK FOR INTAKE AIR LEAK
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
OK or NG
OK©GO TO 2.
NG©Discover air leak location and repair.
2 CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK©GO TO 3.
NG©Repair or replace it.
3 CHECK EGR FUNCTION
Perform DTC Confirmation Procedure for DTC P1402 EGR FUNCTION (OPEN).
Refer to EC-921.
OK or NG
OK©GO TO 4.
NG©Repair EGR system.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure
EC-809

4 PERFORM POWER BALANCE TEST
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode.
SEF190Y
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-II
When disconnecting each injector harness connector one at a time, is there any cylinder which does not produce a
momentary engine speed drop?
SEF846X
YesorNo
Ye s©GO TO 5.
No©GO TO 10.
5 CHECK INJECTOR
Does each injector make an operating sound at idle?
MEC703B
YesorNo
Ye s©GO TO 6.
No©Check injector(s) and circuit(s). Refer to EC-1021.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure (Cont'd)
EC-810

6 CHECK IGNITION SIGNAL CIRCUIT
Refer to ªDiagnostic Procedureº, EC-1008.
OK or NG
OK©GO TO 7.
NG©Repair or replace malfunctioning parts.
7 CHECK IGNITION SPARK
1. Turn Ignition switch ªOFFº.
2. Disconnect ignition wire from spark plug.
3. Connect a known good spark plug to the ignition wire.
4. Place end of spark plug against a suitable ground and crank engine.
5. Check for spark.
SEF282G
OK or NG
OK©GO TO 9.
NG©GO TO 8.
8 CHECK IGNITION WIRES
Refer to ªComponent Inspectionº, EC-814.
OK or NG
OK©Check distributor rotor head for incorrect parts. Check ignition coil, power transistor and
their circuits. Refer to EC-1004.
NG©Replace.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure (Cont'd)
EC-811

9 CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
SEF156I
OK or NG
OK©GO TO 10.
NG©Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to
EM-19, ªChecking and changingº.
10 CHECK COMPRESSION PRESSURE
Refer to EM section.
+Check compression pressure.
Standard:
1,125 kPa (12.75 bar, 13.0 kg/cm
2, 185 psi)/300 rpm
Minimum:
1,079 kPa (10.79 bar, 11.0 kg/cm
2, 156 psi)/300 rpm
Difference between each cylinder:
98 kPa (0.98 bar, 1.0 kg/cm
2, 14 psi)/300 rpm
OK or NG
OK©GO TO 11.
NG©Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
11 CHECK FUEL PRESSURE
1. Install any parts removed.
2. Release fuel pressure to zero. Refer to EC-577.
3. Install fuel pressure gauge and check fuel pressure.
SEF775Z
At idle: Approx. 235 kPa (2.35 bar, 2.4 kg/cm2, 34 psi)
OK or NG
OK©GO TO 13.
NG©GO TO 12.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure (Cont'd)
EC-812

12 DETECT MALFUNCTIONING PART
Check the following.
+Fuel pump and circuit (Refer to EC-1032.)
+Fuel pressure regulator (Refer to EC-578.)
+Fuel lines
+Fuel filter for clogging
©Repair or replace.
13 CHECK IGNITION TIMING
Perform ªBasic Inspectionº.
Refer to EC-623.
OK or NG
OK©GO TO 14.
NG©Adjust ignition timing.
14 CHECK HEATED OXYGEN SENSOR 1 (FRONT)
Refer to ªComponent Inspectionº, EC-715.
OK or NG
OK©GO TO 15.
NG©Replace heated oxygen sensor 1 (front).
15 CHECK MASS AIR FLOW SENSOR
With CONSULT-II
Check ªMASS AIR FLOWº in ªDATA MONITORº mode with CONSULT-II.
at idling: 2.5 - 5.0 g´m/sec
at 2,500 rpm: 7.1 - 12.5 g´m/sec
With GST
Check mass air flow sensor signal in MODE 1 with GST.
at idling: 2.5 - 5.0 g´m/sec
at 2,500 rpm: 7.1 - 12.5 g´m/sec
OK or NG
OK©GO TO 17.
NG©GO TO 16.
16 CHECK CONNECTORS
Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or engine grounds.
Refer to EC-679.
OK or NG
NG©Repair or replace it.
17 CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in ªSymptom Matrix Chartº, EC-648.
OK or NG
OK©GO TO 18.
NG©Repair or replace.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure (Cont'd)
EC-813

18 ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to EC-594.
©GO TO 19.
19 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF174P
Component InspectionNLEC1753IGNITION WIRESNLEC1753S011. Inspect wires for cracks, damage, burned terminals and for
improper fit.
2. Measure the resistance of wires to their distributor cap termi-
nal. Move each wire while testing to check for intermittent
breaks.
Resistance:
13.6 - 18.4 kW/m (4.15 - 5.61 kW/ft) at 25ÉC (77ÉF)
If the resistance exceeds the above specification, inspect igni-
tion wire to distributor cap connection. Clean connection or
replace the ignition wire with a new one.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE
SR20DE
Diagnostic Procedure (Cont'd)
EC-814

SEF598K
Component DescriptionNLEC1524The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element. A knocking vibration
from the cylinder block is sensed as vibrational pressure. This
pressure is converted into a voltage signal and sent to the ECM.
Freeze frame data will not be stored in the ECM for the knock
sensor. The MI will not light for knock sensor malfunction. The
knock sensor has one trip detection logic.
ECM Terminals and Reference ValueNLEC1525Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
81 W Knock sensor[Engine is running]
+Idle speed2.0 - 3.0V
On Board Diagnosis LogicNLEC1526
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0325
0325+An excessively low or high voltage from the knock sen-
sor is sent to ECM.+Harness or connectors
(The knock sensor circuit is open or shorted.)
+Knock sensor
SEF058Y
DTC Confirmation ProcedureNLEC1527NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10V at idle.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
with CONSULT-II.
2) Start engine and run it for at least 5 seconds at idle speed.
3) If DTC is detected, go to ªDiagnostic Procedureº, EC-817.
With GST
Follow the procedure ªWith CONSULT-IIº above.
No Tools
1) Start engine and run it for at least 5 seconds at idle speed.
2) Turn ignition switch ªOFFº, wait at least 10 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
4) If DTC is detected, go to ªDiagnostic Procedureº, EC-817.
DTC P0325 KNOCK SENSOR (KS)SR20DE
Component Description
EC-815