NISSAN X-TRAIL 2001 Service Repair Manual

TROUBLE DIAGNOSIS
EC-1421
[YD]
C
D
E
F
G
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MA
EC
PBIB0474E

EC-1422
[YD]
TROUBLE DIAGNOSIS
PBIB0475E

TROUBLE DIAGNOSIS
EC-1423
[YD]
C
D
E
F
G
H
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MA
EC
Circuit DiagramEBS0037G
TBWA0335E

EC-1424
[YD]
TROUBLE DIAGNOSIS
TBWA0100E

TROUBLE DIAGNOSIS
EC-1425
[YD]
C
D
E
F
G
H
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L
MA
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

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

TROUBLE DIAGNOSIS
EC-1427
[YD]
C
D
E
F
G
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MA
ECA24 BMass air flow sensor
ground[Engine is running]●Warm-up condition
●Idle speedApproximately 0V
A25 G/W Injector's ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
A26 LG/RAccelerator pedal position
sensor 2 ground[Ignition switch “ON”]Approximately 0V
A27 W Sensor's power supply[Ignition switch “ON”]Approximately 5V
A28 PU/RAccelerator pedal position
sensor 1 power supply [Ignition switch “ON”]Approximately 5V
A29 W/PU EDU injector check signal[Engine is running]
●Warm-up condition
●Idle speed1 - 5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1 - 5V
A31 W/L Power 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]
●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.)
B9 G/BFuel injector adjustment
resistor No.2
[Ignition switch “ON”]0.2 - 4.8V
(There are individual differences
between fuel injector adjustment
resistors.) B10 Y/BFuel injector adjustment
resistor No.4
B11 R/BFuel injector adjustment
resistor No.3
B12 W/BFuel injector adjustment
resistor No.1
B13
B14Y/R
Y/RCommon rail fuel pressure
sensor[Engine is running]
●Warm-up condition
●Idle speed1.6 - 1.8V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1.8 - 2.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0391E
PBIB0392E

EC-1428
[YD]
TROUBLE DIAGNOSIS
B15 WAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.8 - 1.3V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.5V
B16 GAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.3 - 1.8V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.0V
B18 R/GCamshaft position sensor
ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
B19 R/Y Camshaft position sensor[Engine is running]
●Warm-up condition
●Idle speed0 - 3V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 8V
B20 L/RCrankshaft position sen-
sor (TDC) ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
B21 L/GCrankshaft position sen-
sor (TDC)[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 30.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0393E
PBIB0394E
PBIB0395E
PBIB0396E

TROUBLE DIAGNOSIS
EC-1429
[YD]
C
D
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ECB23 GY/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 5V
D1 L/OR Tachometer[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 12.5V
D2 OR Glow lamp[Ignition switch “ON”]
●Glow lamp is “ON”Approximately 1.0V
[Ignition switch “ON”]
●Glow lamp is “OFF”BATTERY VOLTAGE
(11 - 14V)
D9 OR/L Malfunction indicator[Ignition switch “ON”]Approximately 1.0V
[Engine is running]
●Idle speedBATTERY VOLTAGE
(11 - 14V)
D11 L Air conditioner relay[Engine is running]
●Air conditioner switch is “OFF”BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Both air conditioner switch and blower fan
switch are “ON” (Compressor is operating)Approximately 0.1V
D14 G/YAccelerator pedal
released position switch[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal slightly depressedBATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully releasedApproximately 0V
D18
D19W/R
W/RIgnition switch [Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
D23 PU/W Air conditioner switch[Engine is running]
●Air conditioner switch is “OFF”BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Both air conditioner switch and blower fan
switch are “ON” (compressor is operating)Approximately 0.1V
D24
D26G
GECM relay (self-shutoff)[Ignition switch “ON”]
[Ignition switch “OFF”]
●For a few seconds after turning ignition
switch “OFF”Approximately 0V
[Ignition switch “OFF”]
●A few seconds passed after turning ignition
switch “OFF”BATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0397E
PBIB0398E

EC-1430
[YD]
TROUBLE DIAGNOSIS
D25 R/G Stop lamp switch[Ignition switch “ON”]●Brake pedal fully releasedApproximately 0V
[Ignition switch “ON”]
●Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
D27 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]BATTERY VOLTAGE
(11 - 14V)
E1 LSuction control valve
power supply[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 12.5V
E2 LG Cooling fan relay (Low)[Engine is running]
●Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operatingApproximately 0.1V
E7 LG/B Cooling fan relay (High)[Engine is running]
●Cooling fan is not operating
●Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating at high speedApproximately 0.1V
E8 Y/G Suction control valve 1[Engine is running]
●Warm-up condition
●Idle speed0 - 12.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 12.5V
E9 W/R Glow relay Refer to EC-1544, "
GLOW CONTROL SYSTEM" .
E10 R CAN communication line[Ignition switch “ON”]Approximately 1.7 - 2.3V
Output voltage varies with the
communication status. TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
PBIB0399E
PBIB0400E
PBIB0401E
PBIB0402E