2003 NISSAN X-TRAIL sensor

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

EC-206
[QR (WITH EURO-OBD)]
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS-
FIRE
PFP:00000
On Board Diagnosis LogicEBS00B5I
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
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 over-
heating, the MI will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor (POS) 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 damage 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
signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation ProcedureEBS00B5J
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch “ON”, and select “DATA MONITOR” mode with CONSULT-II.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch “OFF” and wait at least 10 seconds.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300
0300Multiple cylinder misfire
detectedMultiple cylinder misfire.
lImproper spark plug
lInsufficient compression
lIncorrect fuel pressure
lThe injector circuit is open or shorted
lFuel injectors
lIntake air leak
lThe ignition signal circuit is open or
shorted
lLack of fuel
lDrive plate or flywheel
lHeated oxygen sensor 1 P0301
0301No.1 cylinder misfire
detectedNo. 1 cylinder misfires.
P0302
0302No. 2 cylinder misfire
detectedNo. 2 cylinder misfires.
P0303
0303No. 3 cylinder misfire
detectedNo. 3 cylinder misfires.
P0304
0304No. 4 cylinder misfire
detectedNo. 4 cylinder misfires.

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

EC-212
[QR (WITH EURO-OBD)]
DTC P0327, P0328 KS
DTC P0327, P0328 KS
PFP:22060
Component DescriptionEBS00B5L
The 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.
The MI will not light for knock sensor malfunction.
ECM Terminals and Reference ValueEBS00B5M
Specification data are reference values and are measured between each terminal and body 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.
On Board Diagnosis LogicEBS00B5N
DTC Confirmation ProcedureEBS00B5O
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode with CONSULT-II.
PBIB0512E
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
82 W Knock sensor[Engine is running]
lIdle speedApproximately 2.5V
DTC No.Trouble Diagnosis
NameDTC Detected Condition Possible Cause
P0327
0327Knock sensor circuit
low inputAn excessively low voltage from the sensor is
sent to ECM.
lHarness or connectors
(The sensor circuit is open or shorted.)
lKnock sensor P0328
0328Knock sensor circuit
high inputAn excessively high voltage from the sensor is
sent to ECM.

DTC P0327, P0328 KS
EC-215
[QR (WITH EURO-OBD)]
C
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EC
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

DTC P0335 CKP SENSOR (POS)
EC-217
[QR (WITH EURO-OBD)]
C
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G
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K
L
MA
EC
DTC P0335 CKP SENSOR (POS)PFP:23731
Component DescriptionEBS00B5T
The crankshaft position sensor (POS) is located on the cylinder
block rear housing facing the gear teeth (cogs) of the signal plate at
the end of the crankshaft. It detects the fluctuation of the engine rev-
olution.
The sensor consists of a permanent magnet and Hall IC.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor 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.
CONSULT-II Reference Value in Data Monitor ModeEBS00B5U
Specification data are reference values.
ECM Terminals and Reference ValueEBS00B5V
Specification data are reference values and are measured between each terminal and body 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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
PBIB0562E
MONITOR ITEM CONDITION SPECIFICATION
ENG SPEED·
lTachometer: Connect
lRun engine and compare tachometer indication with the CONSULT-II
value.Almost the same speed as the
CONSULT-II value.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
71 PU/RCrankshaft position
sensor (POS)[Engineisrunning]
lWarm-up condition
lIdle speedApproximately 3V
[Engineisrunning]
lEngine speed is 2,000 rpmApproximately 3V
PBIB0527E
PBIB0528E

EC-218
[QR (WITH EURO-OBD)]
DTC P0335 CKP SENSOR (POS)
On Board Diagnosis Logic
EBS00B5W
DTC Confirmation ProcedureEBS00B5X
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V with igni-
tion switch "ON".
WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2. Crank engine for at least 2 seconds and run it for at least 5 sec-
onds at idle speed.
3. If 1st trip DTC is detected, go toEC-220, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0335
0335Crankshaft position
sensor (POS) circuit
lThe crankshaft position sensor (POS) signal
is not detected by the ECM during the first
few seconds of engine cranking.
lThe proper pulse signal from the crankshaft
position sensor (POS) is not sent to ECM
while the engine is running.
lThe crankshaft position sensor (POS) signal
is not in the normal pattern during engine
running.
lHarness or connectors
(The sensor circuit is open or shorted)
lCrankshaft position sensor (POS)
lSignal plate
SEF058Y