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GLOW CONTROL SYSTEM
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11 . CHECK HARNESS CONTINUITY BETWEEN GLOW RELAY AND GLOW PLUG FOR OPEN AND
SHORT
1. Disconnect glow plug harness connector.
2. Check harness continuity between glow relay terminal 5 and glow plug harness connector.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
12. CHECK GLOW RELAY
Refer to EC-1464, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace glow relay.
13. CHECK GLOW PLUG
Refer to EC-1464, "
Component Inspection" .
OK or NG
OK >> GO TO 14.
NG >> Replace glow plug.
14. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
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EC-1464
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GLOW CONTROL SYSTEM
Component InspectionEBS0125K
GLOW RELAY
Check continuity between glow relay terminals 3 and 5 under the fol-
lowing conditions.
Operation takes less than 1 second.
GLOW PLUG
1. Remove glow plug connecting plate.
2. Check glow plug resistance.
NOTE:
Do not bump glow plug heating element. If it is bumped,
replace glow plug with a new one.
If glow plug is dropped from a height of 10 cm (3.94 in) or
higher, replace with a new one.
If glow plug installation hole is contaminated with car-
bon, remove it with a reamer or suitable tool.
Hand-tighten glow plug by turning it two or three times,
then tighten using a tool to specified torque.
Removal and InstallationEBS0125L
GLOW PLUG
Refer to EM-152, "GLOW PLUG" .
Conditions Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
No current supply No
PBIB0428E
Resistance: Approximately 0.8 Ω [at 25°C (77°F)]
: 20.1 N-m (2.1 kg-m, 15 ft-lb)
PBIB0429E
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EGR VOLUME CONTROL SYSTEMPFP:14710
DescriptionEBS0125M
SYSTEM DESCRIPTION
*: These signals are sent to the ECM thr NISSAN X-TRAIL 2003 Service Repair Manual EGR VOLUME CONTROL SYSTEM
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EGR VOLUME CONTROL SYSTEMPFP:14710
DescriptionEBS0125M
SYSTEM DESCRIPTION
*: These signals are sent to the ECM thr](/manual-img/5/57404/w960_57404-1842.png)
EGR VOLUME CONTROL SYSTEM
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EGR VOLUME CONTROL SYSTEMPFP:14710
DescriptionEBS0125M
SYSTEM DESCRIPTION
*: These signals are sent to the ECM through CAN communication line.
This system controls flow rate of EGR led from exhaust manifold to intake manifold. The opening of the EGR
by-pass passage in the EGR volume control valve changes to control the flow rate. A built-in step motor
moves the valve in steps corresponding to the ECM output pulses. The opening of the valve varies for opti-
mum engine control. The optimum value stored in the ECM is determined by considering various engine con-
ditions.
The EGR volume control valve remains close under the following conditions.
Engine stopped
Engine starting
Low engine coolant temperature
High engine speed
Accelerator pedal fully depressed
COMPONENT DESCRIPTION
EGR Volume Control Valve
The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the ECM.
Two windings are turned ON and OFF in sequence. Each time an
ON pulse is issued, the valve opens or closes, changing the flow
rate. When no change in the flow rate is needed, the ECM does not
issue the pulse signal. A certain voltage signal is issued so that the
valve remains at that particular opening.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor Engine speed
EGR volume con-
trolEGR volume control
valve Vehicle speed sensor* Vehicle speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Accelerator pedal position sensor Accelerator pedal position
Mass air flow sensor Amount of intake air
Air conditioner switch
* Air conditioner operation
SEF908Y
SEF411Y
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EGR VOLUME CONTROL SYSTEM
CONSULT-II Reference Value in Data Monitor ModeEBS0125N
Specification data are reference values.
ECM Terminals and Reference ValueEBS0125O
S NISSAN X-TRAIL 2003 Service Repair Manual EC-1466
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EGR VOLUME CONTROL SYSTEM
CONSULT-II Reference Value in Data Monitor ModeEBS0125N
Specification data are reference values.
ECM Terminals and Reference ValueEBS0125O
S](/manual-img/5/57404/w960_57404-1843.png)
EC-1466
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EGR VOLUME CONTROL SYSTEM
CONSULT-II Reference Value in Data Monitor ModeEBS0125N
Specification data are reference values.
ECM Terminals and Reference ValueEBS0125O
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.
MONITOR ITEM CONDITION SPECIFICATION
EGR VOL CON/V
Engine: After warming up
Air conditioner switch: OFF
Shift lever: Neutral position
No-loadAfter 1 minute at idle More than 10 steps
Revving engine from idle to 3,600
rpm0 step
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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EGR VOLUME CONTROL SYSTEM
EC-1467
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Wiring DiagramEBS0125P
TBWB0009E
Page 1846 of 4179
EC-1468
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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
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3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between NISSAN X-TRAIL 2003 Service Repair Manual EGR VOLUME CONTROL SYSTEM
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3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between](/manual-img/5/57404/w960_57404-1846.png)
EGR VOLUME CONTROL SYSTEM
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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-1469, "
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-1260, "
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.
Page 1848 of 4179
EC-1470
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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.
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.
Removal and InstallationEBS0125S
EGR VOLUME CONTROL VALVE
Refer to EM-136, "INTAKE MANIFOLD" .
Temperature °C (°F) Resistance Ω
20 (68) 13 - 17
PBIB2014E
SEF819Y