2003 NISSAN X-TRAIL engine

EC-1468
[YD (WITHOUT EURO-OBD)]
EGR VOLUME CONTROL SYSTEM

Diagnostic ProcedureEBS0125Q
1. CHECK EGR VOLUME CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch OFF.
2. Set the oscilloscope probe between ECM terminals 25, 26, 27, 28 and ground.
3. Start engine and let it idle.
4. Check the oscilloscope screen when revving engine up to 3,200 rpm and return to idle.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect EGR volume control valve harness connector.
3. Turn ignition switch ON.
4. Check voltage between EGR volume control valve terminals 2, 5
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.The pulse signal as shown in the figure should appear.
MBIB0617E
PBIB1901E
Voltage: Battery voltage
PBIB2013E

TC BOOST CONTROL SOLENOID VALVE
EC-1471
[YD (WITHOUT EURO-OBD)]
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TC BOOST CONTROL SOLENOID VALVEPFP:14956
DescriptionEBS0125T
The turbocharger boost control solenoid valve controls vacuum sig-
nal to the turbocharger boost control actuator. By changing the vari-
able nozzle vane opening through the rods, the intake air volume is
adjusted.
The turbocharger boost control solenoid valve is moved by ON/OFF
pulse from the ECM. The longer the ON pulse, the charge air pres-
sure rises.
ECM Terminals and Reference ValueEBS0125U
Specification data are reference valves, 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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
MBIB0626E
PBIB1897E
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
6LTurbocharger boost control
solenoid valve[Ignition switch ON]

Warm-up condition

Idle speed0 - 12.5V
[Ignition switch ON]

Warm-up condition

Engine speed is 2,000 rpm0 - 12.5V
MBIB0889E
MBIB0890E

TC BOOST CONTROL SOLENOID VALVE
EC-1473
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0125W
1. CHECK OVERALL FUNCTION
1. Start engine and let it idle.
2. Make sure that turbocharger control actuator rod moves slightly
when engine is started.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK TURBOCHARGER BOOST CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Disconnect turbocharger boost control solenoid valve harness
connector.
2. Turn ignition switch ON.
3. Check voltage between turbocharger boost control solenoid
valve terminals 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors F30, M63

Harness for open and short between turbocharger boost control solenoid valve and ECM relay

Harness for open and short between turbocharger boost control solenoid valve and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1936E
PBIB1897E
Voltage: Battery voltage
PBIB1945E

PSP SWITCH
EC-1483
[YD (WITHOUT EURO-OBD)]
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PSP SWITCHPFP:49761
Component DescriptionEBS0126A
The power steering pressure switch is attached to the power steer-
ing high-pressure tube and detects a power steering load.
When a power steering load is detected, it signals the ECM. The
ECM adjusts the fuel injector pulse width to increase the idle speed
and adjust for the increased load.
CONSULT-II Reference Value in Data Monitor ModeEBS0126B
Specification data are reference values.
ECM Terminals and Reference ValueEBS0126C
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.
PBIB1904E
MONITOR ITEM CONDITION SPECIFICATION
PW/ST SIGNAL

Engine: After warming up, idle the
engineSteering wheel is in neutral position.
(Forward direction)OFF
Steering wheel is turned. ON
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage)
111 P / BPower steering pressure
switch[Engine is running]

Steering wheel is being turnedApproximately 0V
[Engine is running]

Steering wheel is not being turnedBATTERY VOLTAGE
(11 - 14V)

PSP SWITCH
EC-1485
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0126E
1. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK POWER STEERING PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect power steering pressure switch harness connector.
3. Check harness continuity between power steering pressure
switch terminal 2 and ground. Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or con-
nectors.
3. CHECK POWER STEERING PRESSURE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 111 and power steering pressure switch terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors M63, F30

Harness for open and short between power steering pressure switch and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
Conditions PW/ST SIGNAL
Steering wheel is in neutral position OFF
Steering wheel is turned ON
PBIB0434E
Continuity should exist.
PBIB1904E
Continuity should exist.

EC-1486
[YD (WITHOUT EURO-OBD)]
PSP SWITCH

5. CHECK POWER STEERING PRESSURE SWITCH
Refer to EC-1486, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace power steering pressure switch.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0126F
POWER STEERING PRESSURE SWITCH
1. Disconnect power steering pressure switch harness connector and then start engine.
2. Check continuity between power steering pressure switch termi-
nal 1 and 2 under the following conditions.
Removal and InstallationEBS0128A
Refer to PS-34, "HYDRAULIC LINE" .
Conditions Continuity
Steering wheel is being fully turned. Yes
Steering wheel is not being turned. No
MBIB0624E

FUEL TRANSPORT PUMP
EC-1487
[YD (WITHOUT EURO-OBD)]
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FUEL TRANSPORT PUMPPFP:17020
DescriptionEBS0126G
SYSTEM DESCRIPTION
Fuel supply entrance of fuel tank is at the left side of fuel tank. The duel at the right side of the fuel tank is sent
to the left side of the fuel tank by fuel transport pump.
When the ECM receives engine revolution signal from the crankshaft position sensor, it knows that the engine
is rotating, and causes the pump operate. If the remainder of the fuel at the right side of the fuel tank
decreases, fuel level switch sends a signal to the ECM. When the ECM receives a signal from the fuel level
switch, the ECM stops the operation of the pump.
The ECM does not directly drive the fuel transport pump. It controls the ON/OFF fuel transport pump relay,
which in turn controls the fuel transport pump.
COMPONENT DESCRIPTION
Fuel Transport Pump
Fuel transport pump sends the fuel from right side of fuel tank to left
side.
Fuel Level Switch
Fuel level switch is assembled in sub fuel level sensor unit. When the remainder of the fuel at the right side of
the fuel tank is less than specified value, the switch is turned OFF.
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor Engine speed
Fuel transport pump control Fuel transport pump relay
Fuel level switch Fuel level
Condition Fuel transport pump operation
Engine is running.Operates
Engine is stopped.Stops
The remainder of the fuel in the fuel tank is less than specified value. Stops
PBIB1887E
PBIB0469E

EC-1488
[YD (WITHOUT EURO-OBD)]
FUEL TRANSPORT PUMP

ECM Terminals and Reference ValueEBS0126H
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage)
14 W/PU Fuel level switch[Ignition switch ON]

Some fuel is in the fuel tankApproximately 0V
[Ignition switch ON]

No fuel is in the fuel tankBATTERY VOLTAGE
(11 - 14V)
39 B/OR Fuel transport pump relay[Engine is running]

Some fuel is in the fuel tankApproximately 0V
[Engine is running]

No fuel is in the fuel tankBATTERY VOLTAGE
(11 - 14V)