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EGR VOLUME CONTROL SYSTEM
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Wiring DiagramEBS0125P
TBWB0009E
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EGR VOLUME CONTROL SYSTEM
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 and Pulse Signal)
25
26
27
28GY
W/L
OR/B
GY/BEGR volume control valve[Engine is running]
Warm-up condition
Idle speed0.1 - 14V
(Voltage signals of each ECM ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
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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
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![NISSAN X-TRAIL 2005 Service Repair Manual EC-1656
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EGR VOLUME CONTROL SYSTEM
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between EGR volume control valve NISSAN X-TRAIL 2005 Service Repair Manual EC-1656
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EGR VOLUME CONTROL SYSTEM
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between EGR volume control valve](/manual-img/5/57403/w960_57403-2059.png)
EC-1656
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EGR VOLUME CONTROL SYSTEM
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between EGR volume control valve and ECM
Harness for open or short between EGR volume control valve and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.
Refer to Wiring Diagram.
4. 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 or connectors.
5. CHECK EGR VOLUME CONTROL VALVE
Refer to EC-1656, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace EGR volume control valve.
6. CHECK EGR PASSAGE
Check the following for clogging and cracks.
EGR tube
EGR hose
EGR cooler
OK or NG
OK >> GO TO 7.
NG >> Repair or replace EGR passage.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-1414, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0125R
EGR VOLUME CONTROL VALVE
With CONSULT-II
1. Disconnect EGR volume control valve harness connector.
ECM terminal EGR volume control valve terminal
25 1
26 6
27 3
28 4
Continuity should exist.
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2. Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6
If NG, replace EGR volume control valve.
If OK, go to next step.
3. Remove EGR volume control valve from cylinder head.
4. Reconnect EGR volume control valve harness connector.
5. Turn ignition switch ON.
6. Perform “EGR VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that EGR volume control
valve shaft moves smoothly forward and backward according to the valve opening.
If NG, replace the EGR volume control valve.
NOTE:
When installing the EGR volume control valve, make sure that the shaft is in the same position before
checking.
Without CONSULT-II
1. Disconnect EGR volume control valve harness connector.
Temperature °C (°F) Resistance Ω
20 (68) 13 - 17
PBIB2014E
SEF819Y
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EGR VOLUME CONTROL SYSTEM
2. Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6
If NG, replace EGR volume control valve.
If OK, go to next step.
3. Remove EGR volume control valve from cylinder head.
4. Reconnect EGR volume control valve harness connector.
5. Turn ignition switch ON and OFF.
6. Check that EGR volume control valve shaft moves smoothly for-
ward and backward according to the ignition switch position.
If NG, replace EGR volume control valve.
NOTE:
When installing the EGR volume control valve, make sure that
the shaft is in the same position before checking.
Removal and InstallationEBS0125S
EGR VOLUME CONTROL VALVE
Refer to EM-146, "INTAKE MANIFOLD" .
Temperature °C (°F) Resistance Ω
20 (68) 13 - 17
PBIB2014E
SEF560W
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TC BOOST CONTROL SOLENOID VALVE
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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.
MBIB0626E
PBIB1897E
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TC BOOST CONTROL SOLENOID VALVE
Wiring DiagramEBS0125V
TBWB0010E