Page 1769 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
EC-1419
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C
D
E
F
G
H
I
J
K
L
MA
EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-1484
Start sign NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
EC-1419
[YD]
C
D
E
F
G
H
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J
K
L
MA
EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-1484
Start sign](/manual-img/5/57405/w960_57405-1768.png)
TROUBLE DIAGNOSIS
EC-1419
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-1484
Start signal circuitEC-1566
Ignition switch circuitEC-1442
Power supply for ECM circuit11EC-1442
Cooling fan relay circuit 2EC-1508
EGR volume control valve circuit 1EC-1551
Glow relay circuit1EC-1544
ECM relay (Self-shutoff) circuit1EC-1538
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2EC-1494,EC-
1536
Air conditioner relay circuitEC-1572
Air conditioner switch circuitEC-1572
NATS (Nissan Anti-theft System)1EC-1406
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. Can be detected by CONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA
Page 1770 of 3833
EC-1420
[YD]
TROUBLE DIAGNOSIS
Engine Control Component Parts Location
EBS00372
PBIB0383E
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TROUBLE DIAGNOSIS
EC-1421
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C
D
E
F
G
H
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MA
EC
PBIB0474E
Page 1772 of 3833
EC-1422
[YD]
TROUBLE DIAGNOSIS
PBIB0475E
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TROUBLE DIAGNOSIS
EC-1423
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F
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H
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EC
Circuit DiagramEBS0037G
TBWA0335E
Page 1774 of 3833
EC-1424
[YD]
TROUBLE DIAGNOSIS
TBWA0100E
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TROUBLE DIAGNOSIS
EC-1425
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EC
ECM Harness Connector Terminal LayoutEBS00374
ECM Terminals And Reference ValueEBS00375
PREPARATION
1. ECM is located behind the glove box. For this inspection,
remove glove box.
2. Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
●Open harness securing clip to make testing easier.
●Use extreme care not to touch 2 pins at one time.
●Data is for comparison and may not be exact.
ECM INSPECTION TABLE
Remarks: 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.
PBIB0473E
PBIB0377E
MEC486B
Page 1776 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-1426
[YD]
TROUBLE DIAGNOSIS
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A1
A2
A3
A4L/W
Y/PU
PU
YEDU drive No. 2
EDU drive No. 4
EDU drive No. 3
EDU drive No. 1[Engin NISSAN X-TRAIL 2001 Service Repair Manual EC-1426
[YD]
TROUBLE DIAGNOSIS
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A1
A2
A3
A4L/W
Y/PU
PU
YEDU drive No. 2
EDU drive No. 4
EDU drive No. 3
EDU drive No. 1[Engin](/manual-img/5/57405/w960_57405-1775.png)
EC-1426
[YD]
TROUBLE DIAGNOSIS
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A1
A2
A3
A4L/W
Y/PU
PU
YEDU drive No. 2
EDU drive No. 4
EDU drive No. 3
EDU drive No. 1[Engine is running]
●Warm-up condition
●Idle speed0 - 4V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 4V
A5
A6
A7B
B
BECM ground[Engine is running]
●Idle speedApproximately 0V
A8
A9R
RPower supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
A10 R Mass air flow sensor[Engine is running]
●Warm-up condition
●Idle speed0.5 - 2.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1.5 - 3.5V
A11 L/OREngine coolant tempera-
ture sensor[Engine is running]
●Warm-up conditionApproximately 0 - 4.8V
Output voltage varies with engine
coolant temperature
A12 PU Fuel temperature sensor[Engine is running]
●Warm-up conditionApproximately 0 - 4.8V
Output voltage varies with fuel
temperature
A21 BAccelerator pedal
released position switch
ground[Ignition switch “ON”]Approximately 0V
A22 LGAccelerator pedal position
sensor 1 ground[Ignition switch “ON”]Approximately 0V
A23 B Sensor's ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
PBIB0387E
PBIB0388E
PBIB0389E
PBIB0390E