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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. CH NISSAN X-TRAIL 2003 Service Repair Manual DTC P0234 TC SYSTEM
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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. CH](/manual-img/5/57404/w960_57404-1720.png)
DTC P0234 TC SYSTEM
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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
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EC-1344
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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
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DTC P0237, P0238 TC BOOST SENSORPFP:22365
Component DescriptionEBS0120U
The turbocharger boost sensor detec NISSAN X-TRAIL 2003 Service Repair Manual DTC P0237, P0238 TC BOOST SENSOR
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DTC P0237, P0238 TC BOOST SENSORPFP:22365
Component DescriptionEBS0120U
The turbocharger boost sensor detec](/manual-img/5/57404/w960_57404-1722.png)
DTC P0237, P0238 TC BOOST SENSOR
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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
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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
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DTC P0237, P0238 TC BOOST SENSOR
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Wiring DiagramEBS0120Z
TBWA0589E
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EC-1348
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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
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2. CHECK TURBOCHARGER BOOST SENSOR POWER SUPPLY CIRCUIT
1. Disconnect turbocharge boost sensor harness conn NISSAN X-TRAIL 2003 Service Repair Manual DTC P0237, P0238 TC BOOST SENSOR
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2. CHECK TURBOCHARGER BOOST SENSOR POWER SUPPLY CIRCUIT
1. Disconnect turbocharge boost sensor harness conn](/manual-img/5/57404/w960_57404-1726.png)
DTC P0237, P0238 TC BOOST SENSOR
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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.
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EC-1350
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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