2001 NISSAN X-TRAIL Service Repair Manual

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Page 1233 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-883
[QR20(WITH EURO-OBD)]
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D
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EC
Wiring DiagramEBS00MUQ
TBWA0057E

Page 1234 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-884
[QR20(WITH EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS00MUR
1. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant tempe

Page 1235 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-885
[QR20(WITH EURO-OBD)]
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EC
Component InspectionEBS00MUS
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temper

Page 1236 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-886
[QR20(WITH EURO-OBD)]
DTC P0120 TP SENSOR
DTC P0120 TP SENSOR
PFP:16119
Component DescriptionEBS00MUU
Electric Throttle Control Actuator consists of throttle control motor,
throttle posi

EC-886
[QR20(WITH EURO-OBD)]
DTC P0120 TP SENSOR
DTC P0120 TP SENSOR
PFP:16119
Component DescriptionEBS00MUU
Electric Throttle Control Actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
CONSULT-II Reference Value in Data Monitor ModeEBS00MUV
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. thus, it differs from ECM terminal voltage signal.
ECM Terminals and Reference ValueEBS00MUW
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.
PBIB0145E
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1
THRTL SEN2*
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released More than 0.36V
●Shift lever:
D (A/T model)
1st (M/T model)Accelerator pedal: Fully depressed Less than 4.75V
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
65 RSensor's power sup-
ply[Ignition switch “ON”]Approximately 5V
73 WThrottle position sen-
sor 1[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal fully releasedMore than 0.36V
[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal fully depressedLess than 4.75V

Page 1237 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0120 TP SENSOR
EC-887
[QR20(WITH EURO-OBD)]
C
D
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EC
On Board Diagnosis LogicEBS00MUX
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A, B, C or D is detected.
*: T

DTC P0120 TP SENSOR
EC-887
[QR20(WITH EURO-OBD)]
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EC
On Board Diagnosis LogicEBS00MUX
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A, B, C or D is detected.
*: The ECM enters in the fail-safe mode when the normal signal is entered to the ECM after the malfunction C was detected.
DTC Confirmation ProcedureEBS00MUY
NOTE:
●Perform “PROCEDURE FOR MALFUNCTION A, B, C AND D” first. If the 1st trip DTC cannot be con-
firmed, perform “PROCEDURE FOR MALFUNCTION E”. If the 1st trip DTC cannot be confirmed,
perform “PROCEDURE FOR MALFUNCTION F”.
74 GThrottle position sen-
sor 2[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal fully releasedLess than 4.75V
[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal fully depressedMore than 0.36V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0120
0120Throttle position sensor
circuitA)An excessively low or high voltage from
the throttle position sensor 1 is sent to
ECM.
●Harness or connectors
(The throttle position sensor 1 or 2 circuit
is open or shorted.)
●Electric throttle control actuator B)An excessively low or high voltage from
the throttle position sensor 2 is sent to
ECM.
C)A difference between signals from sensor
1 and sensor 2 is out of the specified
range.
D)ECM detects a voltage of power source
for sensor is excessively low or high.
●Harness or connectors
(The throttle position sensor 1, 2, accel-
erator pedal position sensor 1, 2, mass
air flow sensor, power steering pressure
sensor or refrigerant pressure sensor cir-
cuit is shorted.)
●ECM
(ECM pin terminal is bend or break.)
E)Closed throttle position learning value is
excessively low.
●Electric throttle control actuator
F)Closed throttle position learning is not
performed successfully, repeatedly.
Detected items Engine operation condition in fail-safe mode
Malfunction A The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle
position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor. Malfunction B
Malfunction C*
Malfunction DECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx.
5 degrees) by the return spring.

Page 1238 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-888
[QR20(WITH EURO-OBD)]
DTC P0120 TP SENSOR
●If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and
wait at least 10 seconds be

Page 1239 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0120 TP SENSOR
EC-889
[QR20(WITH EURO-OBD)]
C
D
E
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EC
Wiring DiagramEBS00MUZ
TBWA0058E

Page 1240 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-890
[QR20(WITH EURO-OBD)]
DTC P0120 TP SENSOR
Diagnostic Procedure
EBS00MV0
MALFUNCTIONING A, B, C, AND D
1. RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engin

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