NISSAN X-TRAIL 2003 Service Repair Manual

DTC P0234 TC SYSTEM
EC-1343
[YD (WITHOUT EURO-OBD)]
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7. CHECK VACUUM PUMP
Refer to EM-153, "
VACUUM PUMP" .
OK or NG
OK >> GO TO 8.
NG >> Replace vacuum pump assembly.
8. CHECK TURBOCHARGER BOOST CONTROL ACTUATOR
1. Turn ignition switch OFF.
2. Install a vacuum pump to turbocharger boost control actuator.
3. Make sure that the turbocharger boost control actuator rod
moves smoothly when applying vacuum of -53.3kPa (-533mbar,
-400mmHg, -15.75inHg) and releasing it.
OK or NG
OK >> GO TO 9.
NG >> Replace turbocharger assembly.
9. CHECK TURBOCHARGER BOOST SENSOR
Refer to EC-1350, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace turbocharger boost sensor.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0120T
TURBOCHARGER BOOST CONTROL SOLENOID VALVE
1. Disconnect turbocharger boost control solenoid valve harness
connector.
2. Apply 12V direct current between turbocharger boost control
solenoid valve terminals.
MBIB1022E
PBIB1897E

EC-1344
[YD (WITHOUT EURO-OBD)]
DTC P0234 TC SYSTEM

3. Check air passage continuity of turbocharger boost control sole-
noid valve under the following conditions.
Operation takes less than 1 second.
If NG, replace turbocharger boost control solenoid valve.
CONDITIONSAir passage continuity
between A and BAir passage continuity
between A and C
12V direct current supply
between terminals 1 and 2Ye s N o
No supply No Yes
MBIB0996E

DTC P0237, P0238 TC BOOST SENSOR
EC-1345
[YD (WITHOUT EURO-OBD)]
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DTC P0237, P0238 TC BOOST SENSORPFP:22365
Component DescriptionEBS0120U
The turbocharger boost sensor detects pressure in the exit side of
the charge air cooler. The sensor output voltage to the ECM
increases as pressure increases.
CONSULT-II Reference Value in Data Monitor ModeEBS0120V
Specification data are reference values.
ECM Terminals and Reference ValueEBS0120W
Specification 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 damage the
ECM's transistor. Use a ground other than ECM terminals, such as the ground.
MBIB0614E
MBIB0899E
MONITOR ITEM CONDITION SPECIFICATION
INT/M PRES SE [kPa]

Engine: After warming up

Air conditioner switch: OFF

Shift lever: Neutral position

No-loadIdle Approx. 100 kPa
2,800 rpm Approx. 126 kPa
4,000 rpm Approx. 106 kPa
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage)
52 Y Turbocharger boost sensor[Engine is running]

Warm-up condition

Idle speed2.3 - 2.6V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm2.5 - 2.8V
64 WTurbocharger boost sensor
power supply[Ignition switch ON]Approximately 5.3V
71 BTurbocharger boost sensor
ground[Ignition switch ON]Approximately 0.3V

EC-1346
[YD (WITHOUT EURO-OBD)]
DTC P0237, P0238 TC BOOST SENSOR

On Board Diagnosis LogicEBS0120X
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS0120Y
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.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If 1st trip DTC is detected, go to EC-1348, "
Diagnostic Proce-
dure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0237Turbocharger boost sensor
circuit low inputAn excessively low voltage from the sensor is
sent to ECM.

Harness or connectors
(The sensor circuit is open or
shorted.)

Turbocharger boost sensor P0238Turbocharger boost sensor
circuit high inputAn excessively high voltage from the sensor is
sent to ECM.
SEF817Y

DTC P0237, P0238 TC BOOST SENSOR
EC-1347
[YD (WITHOUT EURO-OBD)]
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Wiring DiagramEBS0120Z
TBWA0589E

EC-1348
[YD (WITHOUT EURO-OBD)]
DTC P0237, P0238 TC BOOST SENSOR

Diagnostic ProcedureEBS01210
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws. Refer to EC-1267, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2020E

DTC P0237, P0238 TC BOOST SENSOR
EC-1349
[YD (WITHOUT EURO-OBD)]
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2. CHECK TURBOCHARGER BOOST SENSOR POWER SUPPLY CIRCUIT
1. Disconnect turbocharge boost sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between turbocharge boost sensor terminal 1
and ground with CONSULT-II or tester.
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 TURBOCHAGER BOOST SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between turbocharger boost sensor terminal 3 and ECM terminal 71.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK TURBOCHAGER BOOST SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 52 and turbocharger boost sensor terminal 2. Refer to
Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness connectors.
5. CHECK TURBOCHARGER BOOST SENSOR
Refer to EC-1350, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace turbocharger boost sensor.
PBIB1898E
Voltage: Approximately 5.3V
MBIB0072E
Continuity should exist.
Continuity should exist.

EC-1350
[YD (WITHOUT EURO-OBD)]
DTC P0237, P0238 TC BOOST SENSOR

6. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS01211
CHECK TURBOCHARGER BOOST SENSOR
1. Remove turbocharger boost sensor with its harness connected.
2. Turn ignition switch ON.
3. Use pump to apply pressure sensor as shown in the figure.
CAUTION:

Always calibrate the pressure pump gauge when using it.

Inspection should be done at room temperature [10-30°C (50-86°F)].
4. Check the output voltage between turbocharger boost sensor terminal 2 and body ground.
Removal and InstallationEBS01212
TURBOCHARGER BOOST SENSOR
Refer to EM-135, "CHARGE AIR COOLER" .
Pressure (Relative to atmospheric pressure) Voltage V
0 kPa (0 mbar, 0 mmHg, 0 inHg) Approximately 2.3V
+40 kPa (400 mbar, 300mmHg, 11.81 inHg) Approximately 2.9V
MBIB0925E

DTC P0335 CKP SENSOR
EC-1351
[YD (WITHOUT EURO-OBD)]
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DTC P0335 CKP SENSORPFP:23731
DescriptionEBS01213
The crankshaft position sensor monitors engine speed by means of
signals from the sensing plate (with 56 protrusions) installed to the
fly wheel. The datum signal output is detected 6° signal and sent to
the ECM. The sensor signal is used for fuel injection control and fuel
injection timing control.
CONSULT-II Reference Value in Data Monitor ModeEBS01214
Specification data are reference values.
ECM Terminals and Reference ValueEBS01215
Specification 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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
MBIB0619E
MONITOR ITEM CONDITION SPECIFICATION
CKPS-RPM (TDC)

Run engine and compare CONSULT-II value with the tachometer
indication.Almost the same speed as the
tachometer indication
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
44 L/WCrankshaft position sen-
sor power supply[Ignition switch ON]Approximately 5.3V
46 L Crankshaft position sensor[Engine is running]

Warm-up condition

Idle speed0 - 6V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 6V
65 L/RCrankshaft position sen-
sor ground[Ignition switch ON]Approximately 0.3V
67 —Sensor ground
(Sensors shield circuit)[Ignition switch ON]Approximately 0.3V
MBIB0879E
MBIB0880E

EC-1352
[YD (WITHOUT EURO-OBD)]
DTC P0335 CKP SENSOR

On Board Diagnosis LogicEBS01216
DTC Confirmation ProcedureEBS01217
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.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 5 seconds.
If engine could not start, keep ignition switch at START position
for 5 seconds.
4. If 1st trip DTC is detected, go to EC-1354, "
Diagnostic Proce-
dure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0335Crankshaft position sen-
sor circuitCrankshaft position sensor signal is not detect
by the ECM when engine is running.

Harness or connectors
(The sensor circuit is open or
shorted.)

Crankshaft position sensor
SEF817Y