2003 NISSAN X-TRAIL check engine

EC-204
[QR (WITH EURO-OBD)]
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
5.CHECK MASS AIR FLOW SENSOR
With CONSULT-II
1. Install all removed parts.
2. Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-II.
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in MODE 1 with GST.
OK or NG
OK >> GO TO 6.
NG >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
engine grounds. Refer toEC-130, "
DTC P0102, P0103 MAF SENSOR".
6.CHECK FUNCTION OF INJECTORS
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that each circuit produces a momentary engine
speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
OK or NG
OK >> GO TO 7.
NG >> Perform trouble diagnosis for “INJECTORS”,EC-343
. 1.0 - 4.0 g·m/sec: at idling
4.0 - 10 g·m/sec: at 2,500 rpm
1.0 - 4.0 g·m/sec: at idling
4.0 - 10 g·m/sec: at 2,500 rpm
PBIB0133E
Clicking noise should be heard.
MEC703B

DTC P0172 FUEL INJECTION SYSTEM FUNCTION
EC-205
[QR (WITH EURO-OBD)]
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7.CHECK INJECTOR
1. Remove injector assembly. Refer toEM-29, "
FUEL INJECTOR AND FUEL TUBE".
Keep fuel hose and all injectors connected to injector gallery.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect injector harness connectors.
The injector harness connectors should remain connected.
4. Disconnect all ignition coil harness connectors.
5. Prepare pans or saucers under each injectors.
6. Crank engine for about 3 seconds.
Make sure fuel does not drip from injector.
OK or NG
OK (Does not drip.)>>GO TO 8.
NG (Drips.)>>Replace the injectors from which fuel is dripping. Always replace O-ring with new one.
8.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END

DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-207
[QR (WITH EURO-OBD)]
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4. Start engine again and drive at 1,500 to 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 condi-
tions.
5. If 1st trip DTC is detected, go toEC-207, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureEBS00B5K
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
1. 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.
PBIB0164E

EC-208
[QR (WITH EURO-OBD)]
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
3.PERFORM POWER BALANCE TEST
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
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?
Ye s o r N o
Yes >>GOTO4.
No >> GO TO 7.
4.CHECK INJECTOR
Does each injector make an operating sound at idle?
Ye s o r N o
Yes >>GOTO5.
No >> Check injector(s) and circuit(s). Refer toEC-343,
"INJECTOR CIRCUIT".
PBIB0133E
PBIB0510E
MEC703B

DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
EC-209
[QR (WITH EURO-OBD)]
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5.CHECK IGNITION SPARK
1. Disconnect ignition coil assembly from rocker cover.
2. Connect a known good spark plug to the ignition coil assembly.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.
OK or NG
OK >> GO TO 6.
NG >> Check ignition coil, power transistor and their circuits.
Refer toEC-334, "
IGNITION SIGNAL".
6.CHECK SPARK PLUGS
Remove the spark plugs and check for fouling, etc.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace spark plug(s) with standard type
one(s). For spark plug type, refer toMA-25, "
Checking
and Changing Spark Plugs".
7.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer toEM-52, "
CHECKING COMPRESSION PRESSURE".
OK or NG
OK >> GO TO 8.
NG >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
8.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer toEC-34, "
FUEL PRESSURE RELEASE".
3. Install fuel pressure gauge and check fuel pressure. Refer toEC-34, "
FUEL PRESSURE CHECK".
OK or NG
OK >> GO TO 9.
NG >> Follow the construction of "FUEL PRESSURE CHECK".
SEF575Q
SEF156I
Standard:
1,190 kPa (11.9 bar, 12.1 kg/cm2, 172 psi)/250
rpm
Minimum:
990 kPa (9.9 bar, 10.1 kg/cm
2, 144 psi)/250 rpm
Difference between each
cylinder:98 kPa (0.98 bar, 1.0 kg/cm
2, 14 psi)/250 rpm
At idle: Approx. 350 kPa (3.5 bar, 3.7 kg/cm
2,51psi)

EC-210
[QR (WITH EURO-OBD)]
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
9.CHECK IGNITION TIMING
Check the following items. Refer toEC-64, "
Basic Inspection".
OK or NG
OK >> GO TO 10.
NG >> Follow the “Basic Inspection”.
10.CHECK HEATED OXYGEN SENSOR 1
Refer toEC-164, "
Component Inspection".
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .CHECK MASS AIR FLOW SENSOR
With CONSULT-II
Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-II.
With GST
Check mass air flow sensor signal in MODE 1 with GST.
OK or NG
OK >> GO TO 12.
NG >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
engine grounds. Refer toEC-130, "
DTC P0102, P0103 MAF SENSOR".
12.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom inEC-69, "
Symptom Matrix Chart".
OK or NG
OK >> GO TO 13.
NG >> Repair or replace.
13.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 toEC-46, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION".
>> GO TO 14.
Items Specifications
Ta r g e t i d l e s p e e dA/T 700±50 rpm (in "P" or "N" position)
M/T 650±50 rpm
Ignition timingA/T 16±5°BTDC (in "P" or "N" position)
M/T 14±5°BTDC
1.4 - 4.0 g·m/sec: at idling
4.0 - 10.0 g·m/sec: at 2,500 rpm
1.4 - 4.0 g·m/sec: at idling
4.0 - 10.0 g·m/sec: at 2,500 rpm

DTC P0327, P0328 KS
EC-215
[QR (WITH EURO-OBD)]
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Diagnostic ProcedureEBS00B5Q
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 82 and engine ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MW.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 82 and knock sensor terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK KNOCK SENSOR
Refer toEC-216, "
Component Inspection".
OK or NG
OK >> GO TO 5.
NG >> Replace knock sensor.Resistance: Approximately 530 - 590kW[at 20°C(68°F)]
Continuity should exist.
PBIB0512E

EC-216
[QR (WITH EURO-OBD)]
DTC P0327, P0328 KS
4.RETIGHTEN GROUND SCREWS
Loosen and retighten engine ground screws.
>> GO TO 5.
5.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00B5R
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more
than 10 MW.
CAUTION:
Do not use any knock sensors that have been dropped or phys-
ically damaged. Use only new ones.
Removal and InstallationEBS00B5S
KNOCK SENSOR
Refer toEM-64, "CYLINDER BLOCK".
PBIB0494E
Resistance: Approximately 530 - 590kW[at 20°C(68°F)]
SEF478Y