NISSAN X-TRAIL 2003 Electronic Repair Manual

GLOW CONTROL SYSTEM
EC-797
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS0035L
TBWA0108E

EC-798
[YD]
GLOW CONTROL SYSTEM
Diagnostic Procedure
EBS0035M
1.INSPECTION START
Check fuel level, fuel supplying system, starter motor, etc.
OK or NG
OK >> GO TO 2.
NG >> Correct.
2.CHECK INSTALLATION
Check that glow plug nut and all glow plug connecting plate nuts are
installed properly.
OK or NG
OK >> GO TO 3.
NG >> Install properly.
3.CHECK GLOW INDICATOR LAMP OPERATION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
3. Confirm that “COOLAN TEMP/S” indicates below 80°C (176°F).
If it indicates above 80°C(176°F), cool down engine.
4. Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
5. Make sure that glow indicator lamp is turned “ON” for 1.5 sec-
onds or more after turning ignition switch “ON”, and then glow
indicator lamp turned “OFF”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
SEF392YA
SEF013Y

GLOW CONTROL SYSTEM
EC-799
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
4.CHECK GLOW CONTROL SYSTEM OVERALL FUNCTION
1. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
2. Confirm that “COOLAN TEMP/S” indicates approximately 25°C
(77°F). If NG, cool down engine.
3. Turn ignition switch “OFF”.
4. Set voltmeter probe between glow plug and engine body.
5. Turn ignition switch “ON”.
6. Check the voltage between glow plug and engine body under
the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
5.CHECK GLOW INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness connector M46.
3. Turn ignition switch “ON”.
4. Check voltage between combination meter terminal 46 or 59
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
lFuse block (J/B) connector M1
l10A fuse
lHarness for open or short between combination meter and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
SEF013Y
Conditions Voltage
For 20 seconds after turning ignition switch
"ON"Battery voltage
More than 20 seconds after turning ignition
switch "ON"Approx. 0V
PBIB0425E
Voltage: Battery voltage
PBIB0426E

EC-800
[YD]
GLOW CONTROL SYSTEM
7.CHECK GLOW INDICATOR LAMP OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal D2 and combination meter terminal 65 or 55. Refer to
Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors M63, F30
lHarness for open or short between combination meter and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK COMBINATION METER
Check combination meter and glow indicator lamp. Refer toDI-4, "
COMBINATION METERS (LHD MODELS)"
orDI-22, "COMBINATION METERS (RHD MODELS)"andDI-39, "WARNING LAMPS".
OK or NG
OK >> GO TO 17.
NG >> Repair or replace combination meter or glow indicator lamp.
10.CHECK GLOW RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect glow relay.
3. Check voltage between glow relay terminals 1, 3 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.Continuity should exist.
PBIB0373E
Voltage: Battery voltage
PBIB0427E

GLOW CONTROL SYSTEM
EC-801
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
11 .DETECT MALFUNCTIONING PART
Check the following.
l60A fusible link
lHarness for open or short between glow relay and battery
>> Repair harness or connectors.
12.CHECK GLOW RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal E9 and glow relay terminal 2. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> GO TO 13.
13.DETECT MALFUNCTIONING PART
Check the following.
lHarness connectors E63, F4
lHarness for open or short between glow relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
14.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 15.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
15.CHECK GLOW RELAY
Refer toEC-802, "
Component Inspection".
OK or NG
OK >> GO TO 16.
NG >> Replace glow relay.
16.CHECK GLOW PLUG
Refer toEC-802, "
Component Inspection".
OK or NG
OK >> GO TO 17.
NG >> Replace glow plug.Continuity should exist.
Continuity should exist.

EC-802
[YD]
GLOW CONTROL SYSTEM
17.CHECK INTERMITTENT INCIDENT
Refer toEC-699, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS003PM
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:
lDo not bump glow plug heating element. If it is bumped,
replace glow plug with a new one.
lIf glow plug is dropped from a height of 10 cm (3.94 in) or
higher, replace with a new one.
lIf glow plug installation hole is contaminated with car-
bon, remove it with a reamer or suitable tool.
lHand-tighten glow plug by turning it two or three times,
then tighten using a tool to specified torque.
Removal and InstallationEBS008ZE
GLOW PLUG
Refer toEM-130, "GLOW PLUG".
Conditions Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
No current supply No
PBIB0428E
Resistance: Approximately 0.8W[at 25°C(77°F)]
: 17.7 - 22.5 N-m (1.8 - 2.3 kg-m, 13 - 16 ft-lb)
PBIB0429E

EGR VOLUME CONTROL SYSTEM
EC-803
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
EGR VOLUME CONTROL SYSTEMPFP:14710
DescriptionEBS0035N
SYSTEM DESCRIPTION
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.
lEngine stopped
lEngine starting
lLow engine coolant temperature
lExcessively high engine coolant temperature
lHigh engine speed
lWide open throttle
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.
CONSULT-II Reference Value in Data Monitor ModeEBS0035O
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (TDC) 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

EC-804
[YD]
EGR VOLUME CONTROL SYSTEM
ECM Terminals and Reference Value
EBS0035P
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
lEngine: After warming up
lAir conditioner switch: OFF
lShift lever: Neutral position
lNo-loadAfter one minute at idle More than 10 steps
Revvingenginefromidleto3,600
rpm0step
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A8
A9R
RPower supply for ECM[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
B3
B4
B5
B6W
OR/B
W/L
GYEGR volume control valve[Engine is running]
lWarm-up condition
lIdle speed0.1 - 14V
(Voltage signals of each ECM ter-
minals differ according to the con-
trol position of EGR volume
control valve.)
D24
D26G
GECM relay (self-shutoff)[Ignition switch “ON”]
[Ignition switch “OFF”]
lFor a few seconds after turning ignition
switch "OFF"Approximately 0V
[Ignition switch “OFF”]
lA few seconds passed after turning ignition
switch "OFF"BATTERY VOLTAGE
(11 - 14V)

EGR VOLUME CONTROL SYSTEM
EC-805
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS0035Q
TBWA0109E

EC-806
[YD]
EGR VOLUME CONTROL SYSTEM
Diagnostic Procedure
EBS0035R
1.CHECK EGR VOLUME CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch “OFF”.
2. Set the oscilloscope probe between ECM terminals B3, B4, B5, B6 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 7.
NG >> GO TO 3.The pulse signal as shown in the figure should appear.
PBIB0430E
PBIB0380E
Voltage: Battery voltage
PBIB0431E