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TROUBLE DIAGNOSIS
EC-423
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PBIB0486E
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EC-424
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TROUBLE DIAGNOSIS
PBIB0487E
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TROUBLE DIAGNOSIS
EC-425
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EC
Circuit DiagramEBS00BN0
TBWA0052E
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EC-426
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TROUBLE DIAGNOSIS
TBWA0053E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-427
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ECM Harness Connector Terminal LayoutEBS00BN1
ECM Terminals and Reference ValueEBS00BN2
PREPARATION
1. ECM is located behind NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-427
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ECM Harness Connector Terminal LayoutEBS00BN1
ECM Terminals and Reference ValueEBS00BN2
PREPARATION
1. ECM is located behind](/manual-img/5/57402/w960_57402-1540.png)
TROUBLE DIAGNOSIS
EC-427
[QR (WITHOUT EURO-OBD)]
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ECM Harness Connector Terminal LayoutEBS00BN1
ECM Terminals and Reference ValueEBS00BN2
PREPARATION
1. ECM is located behind the glove box. For this inspection,
remove glove box.
2. Remove ECM harness protector.
3. Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
lOpen harness securing clip to make testing easier.
lUse extreme care not to touch 2 pins at one time.
lData is for comparison and may not be exact.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and body 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.
SEF970W
PBIB0493E
MEC486B
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
2P/LHeated oxygen sen-
sor 1 heater[Engineisrunning]
lWarm-up condition
lEngine speed is below 3,600 rpm.Approximately 7.0V
[Engineisrunning]
lEngine speed is above 3,600 rpm.BATTERY VOLTAGE
(11 - 14V)
PBIB0519E
Page 1542 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-428
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
4PU/RHeated oxygen sen-
sor 2 heater[Engine is running]
lEngine speed is below 3,800 rpm.
lAfter driving for 2 minutes at a speed of 70 km/h
(43 MPH) o NISSAN X-TRAIL 2003 Electronic Repair Manual EC-428
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TROUBLE DIAGNOSIS
4PU/RHeated oxygen sen-
sor 2 heater[Engine is running]
lEngine speed is below 3,800 rpm.
lAfter driving for 2 minutes at a speed of 70 km/h
(43 MPH) o](/manual-img/5/57402/w960_57402-1541.png)
EC-428
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TROUBLE DIAGNOSIS
4PU/RHeated oxygen sen-
sor 2 heater[Engine is running]
lEngine speed is below 3,800 rpm.
lAfter driving for 2 minutes at a speed of 70 km/h
(43 MPH) or more.0-1.0V
[Ignition switch “ON”]
lEngine stopped
[Engine is running]
lEngine speed is above 3,800 rpm.BATTERY VOLTAGE
(11 - 14V)
12 R/BCounter current
return[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
13 PEVAP canister purge
volume control sole-
noid valve[Engine is running]
lIdle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
lEngine speed is about 2,000 rpmApproximately 10V
18 R/Y MI[Ignition switch “ON”]0-1.0V
[Engine is running]
lIdle speedBATTERY VOLTAGE
(11 - 14V)
20 W/GECM relay
(Self shut-off)[Engine is running]
[Ignition switch “OFF”]
lFor 3 seconds after turning ignition switch “OFF”0-1.0V
[Ignition switch “OFF”]
l3 seconds passed after turning ignition switch
“OFF”BATTERY VOLTAGE
(11 - 14V)
21
22
23
24BR
PU
L/R
GY/RIgnition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4[Engine is running]
lWarm-up condition
lIdle speed0-0.1V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0-0.2V
26 L Air conditioner relay[Engine is running]
lBoth A/C switch and blower switch are “ON”
(Compressor operates).0-1.0V
[Engine is running]
lA/C switch is “OFF”.BATTERY VOLTAGE
(11 - 14V) TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0520E
PBIB0521E
PBIB0522E
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EC-429
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EC27 LG/BCooling fan relay
(High)[Engineisrunning]lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCoo NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-429
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EC27 LG/BCooling fan relay
(High)[Engineisrunning]lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCoo](/manual-img/5/57402/w960_57402-1542.png)
TROUBLE DIAGNOSIS
EC-429
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EC27 LG/BCooling fan relay
(High)[Engineisrunning]lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCooling fan is high speed operating0-1.0V
29 B/P Fuel pump relay[Ignition switch “ON”]
lFor 1 seconds after turning ignition switch “ON”
[Engineisrunning]0-1.0V
[Ignition switch “ON”]
lMore than 1 seconds after turning ignition switch
“ON”.BATTERY VOLTAGE
(11 - 14V)
30 PU/WAir conditioner cut
signal[Engineisrunning]
lBoth A/C switch and blower switch are “ON”
(Compressor operates).Approximately 0V
[Engineisrunning]
lA/C switch is “ON”
(Compressor not operates).Approximately 4.6V
33B/W
(With A/T)
W
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.6V
Output voltage varies with the
communication status.
34L/R
(With A/T)
R
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.4V
Output voltage varies with the
communication status.
36 L/OR Tachometer signal[Engineisrunning]
lWarm-up condition
lIdle speed6-7V
[Engineisrunning]
lEngine speed is 2,500 rpm6-7V
37 LGCooling fan relay
(Low)[Engineisrunning]
lCooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engineisrunning]
lCooling fan is operating0-1.0V
40 P Stop lamp switch[Engineisrunning]
lBrake pedal fully releasedApproximately 0V
[Engineisrunning]
lBrake pedal fully depressedBATTERY VOLTAGE
(11 - 14V)
41 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]9-14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0523E
PBIB0524E
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![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-430
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TROUBLE DIAGNOSIS
42 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
43 G/OR PNP switch[Ignition switch “ON”]
l NISSAN X-TRAIL 2003 Electronic Repair Manual EC-430
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TROUBLE DIAGNOSIS
42 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
43 G/OR PNP switch[Ignition switch “ON”]
l](/manual-img/5/57402/w960_57402-1543.png)
EC-430
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
42 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
43 G/OR PNP switch[Ignition switch “ON”]
lGear position is “P” or “N”.Approximately 0V
[Ignition switch “ON”]
lExcept the above gear positionA/T model
BATTERY VOLTAGE
(11 - 14V)
M/T model
Approximately 5V
50 LG Data link connector[Ignition switch “ON”]
lCONSULT-II or GST is disconnected.Approximately 5V
52 R/WElectrical load signal
(Rear window defog-
ger signal)[Ignition switch "ON"]
lRear window defogger switch is "ON"BATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lRear window defogger switch is "OFF"Approximately 0V
53 R/YElectrical load signal
(Headlamp signal)[Ignition switch "ON"]
lLighting switch is "2ND" positionBATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lLighting switch is "OFF"Approximately 0V
55 LG/BHeater fan switch sig-
nal[Ignition switch "ON"]
lHeater fan control switch is "ON"Approximately 0V
[Ignition switch "ON"]
lHeater fan control switch is "OFF"Approximately 5V
58 B Sensors' ground[Engine is running]
lWarm-up condition
lIdle speedApproximately 0V
59
60
106
108B
B
B/Y
B/YECM ground[Engine is running]
lIdle speedEngine ground
63 L/WCamshaft position
sensor (PHASE)[Engine is running]
lWarm-up condition
lIdle speed1.0 - 4.0V
[Engine is running]
lEngine speed is 2,000 rpm.1.0 - 4.0V
64 OR/LAccelerator pedal
position sensor 2
power supply[Ignition switch “ON”]Approximately 2.5V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0525E
PBIB0526E