check engine NISSAN PRIMERA 1999 Electronic Repair Manual

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-SR-32. 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 coil harness connectors.
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.
9 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-SR-114.
©INSPECTION END
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
(RICH SIDE)SR20DE
Diagnostic Procedure (Cont'd)
EC-223

On Board Diagnosis LogicNCEC0202If a misfire occurs, the engine speed will fluctuate. If the fluctuation is detected by the crankshaft position sen-
sor (OBD), the misfire is diagnosed.
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 trip 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 signal every 200 engine revolutions
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 damage the TWC (but will affect exhaust 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 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
0300IMultiple cylinders misfire.IImproper spark plug
IInsufficient compression
IIncorrect fuel pressure
IThe injector circuit is open or shorted
IInjectors
IIntake air leak
IThe ignition secondary circuit is open or
shorted
ILack of fuel
IHeated oxygen sensor 1 (front)
IDrive plate/Flywheel
IIncorrect distributor rotor P0301
0301INo. 1 cylinder misfires.
P0302
0302INo. 2 cylinder misfires.
P0303
0303INo. 3 cylinder misfires.
P0304
0304INo. 4 cylinder misfires.
DTC Confirmation ProcedureNCEC0203CAUTION:
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 9 seconds
before conducting the next test.
TESTING CONDITION:
IAlways perform at a temperature above þ10ÉC (14ÉF).
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 9 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-SR-225.
With GST
Follow the procedure ªWith CONSULT-IIº above.
NEF068A
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRESR20DE
On Board Diagnosis Logic
EC-224

Diagnostic ProcedureNCEC0204
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 PERFORM POWER BALANCE TEST
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode.
NEF105A2. 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?
SEF233X
YesorNo
Ye s©GO TO 5.
No©GO TO 8.
Remove to
test other injectors
Injector harness
connector (for No. 2 cylinder)
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRESR20DE
Diagnostic Procedure
EC-225

4 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-SR-304.
5 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 8.
NG©GO TO 7.
6 CHECK IGNITION WIRES
Refer to ªComponent Inspectionº, EC-SR-229.
OK or NG
OK©Check distributor rotor head for incorrect parts. Check ignition coil, power transistor and
their circuits. Refer to EC-SR-310.
NG©Replace.
Ignition wire
Spark plug
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRESR20DE
Diagnostic Procedure (Cont'd)
EC-226

7 CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
SEF156I
OK or NG
OK©GO TO 9.
NG©Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to
ªENGINE MAINTENANCEº in MA section.
8 CHECK COMPRESSION PRESSURE
Refer to EM section.
ICheck compression pressure.
Standard:
1,226 kPa (12.26 bar, 12.5 kg/cm
2, 178 psi)/300 rpm
Minimum:
1,030 kPa (10.30 bar, 10.5 kg/cm
2, 149 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 10.
NG©Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
9 CHECK FUEL PRESSURE
1. Install any parts removed.
2. Release fuel pressure to zero. Refer to EC-SR-31.
3. Install fuel pressure gauge and check fuel pressure.
SEF194XAt idle:
Approx. 235 kPa (2.35 bar, 2.4 kg/cm2, 34 psi)
OK or NG
OK©GO TO 12.
NG©GO TO 11.
Fuel filter
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRESR20DE
Diagnostic Procedure (Cont'd)
EC-227

10 DETECT MALFUNCTIONING PART
Check the following.
IFuel pump and circuit Refer to EC-SR-320.
IFuel pressure regulator Refer to EC-SR-32.
IFuel lines Refer to ªENGINE MAINTENANCEº in MA section.
IFuel filter for clogging
©Repair or replace.
11 CHECK IGNITION TIMING
Perform ªBasic Inspectionº, EC-SR-84.
OK or NG
OK©GO TO 13.
NG©Adjust ignition timing.
12 CHECK HEATED OXYGEN SENSOR 1 (FRONT)
Refer to ªComponent Inspectionº, EC-SR-154.
OK or NG
OK©GO TO 14.
NG©Replace heated oxygen sensor 1 (front).
13 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 16.
NG©GO TO 15.
14 CHECK CONNECTORS
Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or engine grounds.
Refer to EC-SR-120.
OK or NG
NG©Repair or replace it.
15 CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in ªSymptom Matrix Chartº, EC-SR-94.
OK or NG
OK©GO TO 17.
NG©Repair or replace.
DTC P0300 - P0304 NO.4-1CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRESR20DE
Diagnostic Procedure (Cont'd)
EC-228

Component DescriptionNCEC0206The 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 ValueNCEC0207Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
81 W Knock sensor[Engine is running]
IIdle speed2.0 - 3.0V
On Board Diagnosis LogicNCEC0208
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0325
0325IAn excessively low or high voltage from the knock sen-
sor is sent to ECM.IHarness or connectors
(The knock sensor circuit is open or shorted.)
IKnock sensor
DTC Confirmation ProcedureNCEC0209NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 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-SR-232.
With GST
Follow the procedure ªWith CONSULT-IIº above.
SEF598K
NEF068A
DTC P0325 KNOCK SENSOR (KS)SR20DE
Component Description
EC-230

Diagnostic ProcedureNCEC0211
1 RETIGHTEN GROUND SCREWS
Loosen and retighten engine ground screws.
SEF202X
©GO TO 2.
2 CHECK INPUT SIGNAL CIRCUIT-1
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and knock sensor harness connector.
SEF210X3. Check harness continuity between knock sensor signal terminal 2 and ECM terminal 81.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the harness for open or short between knock sensor and ECM.
©Repair open circuit or short to ground or short to power in harness or connectors.
4 CHECK KNOCK SENSOR
Knock sensor
Refer to ªComponent Inspectionº, EC-SR-233.
OK or NG
OK©GO TO 5.
NG©Replace knock sensor.
Intake manifold collector
Engine ground
Knock sensor Knock sensor harness connector
Drive shaft View from under the vehicle
DTC P0325 KNOCK SENSOR (KS)SR20DE
Diagnostic Procedure
EC-232

Component DescriptionNCEC0577The crankshaft position sensor (OBD) is located on the transmis-
sion housing facing the gear teeth (cogs) of the flywheel or drive
plate. It detects the fluctuation of the engine revolution.
The sensor consists of a permanent magnet, core and coil.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
This sensor is not used to control the engine system.
It is used only for the on board diagnosis.
ECM Terminals and Reference ValueNCEC0578Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (AC Voltage)
58 B Sensors' ground[Engine is running]
IWarm-up condition
IIdle speedApproximately 0V
65 WCrankshaft position sen-
sor (OBD)[Engine is running]
IWarm-up condition
IIdle speed3 - 5V (AC range)
SEF721W
[Engine is running]
IEngine speed is 2,000 rpm6 - 9V (AC range)
SEF722W
On Board Diagnosis LogicNCEC0579
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0335
0335IThe proper pulse signal from the crankshaft position sen-
sor (OBD) is not sent to ECM while the engine is running
at the specified engine speed.IHarness or connectors
(The crankshaft position sensor (OBD) circuit is
open.)
ICrankshaft position sensor (OBD)
SEF956N Core
Permanent magnetCoil
SEF226X Crankshaft position
sensor (OBD) harness connector
Cooling fan motor
(Left side)
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (OBD)SR20DE
Component Description
EC-234

Diagnostic ProcedureNCEC0582
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
©GO TO 2.
2 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect crankshaft position sensor (OBD) and ECM harness connectors.
SEF226X2. Check continuity between ECM terminal 65 and crankshaft position sensor (OBD) harness connector terminal 1.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the harness for open or short between crankshaft position sensor (OBD) and ECM.
©Repair open circuit or short to ground or short to power in harness or connectors.
4 CHECK GROUND CIRCUIT
1. Reconnect ECM harness connectors.
2. Check harness continuity between crankshaft position sensor harness connector terminal 2 and engine ground.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
IHarness for open or short between crankshaft position sensor (OBD) and ECM
IHarness for open or short between crankshaft position sensor (OBD) and TCM (Transmission control module)
©Repair open circuit or short to ground or short to power in harness or connectors.
Crankshaft position
sensor (OBD) harness connector
Cooling fan motor
(Left side)
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (OBD)SR20DE
Diagnostic Procedure
EC-237