2003 NISSAN X-TRAIL sensor

DTC P0120 TP SENSOR
EC-475
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EC
DTC P0120 TP SENSORPFP:16119
Component DescriptionEBS00BGH
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 ModeEBS00BGI
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BGJ
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.
PBIB0145E
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1
THRTL SEN2
lIgnition switch: ON
(Engine stopped)Accelerator pedal: Fully released More than 0.36V
lShift 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[Engineisrunning]
lWarm-up condition
lIdle speedApproximately 0V
65 RSensor's power sup-
ply[Ignition switch “ON”]Approximately 5V
73 WThrottlepositionsen-
sor 1[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully releasedMore than 0.36V
[Ignition switch “ON”]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully depressedLess than 4.75V

EC-476
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DTC P0120 TP SENSOR
On Board Diagnosis Logic
EBS00BGK
FAIL -S AFE M OD E
ECM enters in 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 ProcedureEBS00BGL
NOTE:
lPerform “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".
lIf “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and
wait at least 10 seconds before conducting the next test.
74 GThrottle position sen-
sor 2[Ignition switch "ON"]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator pedal fully releasedLess than 4.75V
[Ignition switch “ON”]
lGear position is "D" (A/T model)
lGear position is "1st" (M/T model)
lAccelerator 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.
lHarness or connectors
(The throttle position sensor 1 or 2 circuit
is open or shorted.)
lElectric 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.
lHarness 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.)
lECM
(ECM pin terminal is bend or break.)
E)Closed throttle position learning value is
excessively low.
lElectric 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 an opening speed of approx. 5 seconds to an opening of 10 degrees.
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.

DTC P0120 TP SENSOR
EC-477
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EC
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
PROCEDURE FOR MALFUNCTION A, B, C AND D
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If 1st trip DTC is detected, go toEC-480, "
MALFUNCTIONING
A, B, C, AND D"in "Diagnostic Procedure".
Without CONSULT-II
1. Start engine and let it idle for 1 second.
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results) with ECM.
4. If 1st trip DTC is detected, go toEC-480, "
MALFUNCTIONING A, B, C, AND D"in "Diagnostic Proce-
dure".
PROCEDURE FOR MALFUNCTION E
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch "OFF", wait at least 10 seconds.
4. Turn ignition switch "ON".
5. If 1st trip DTC is detected, go toEC-482, "
MALFUNCTION E
AND F"in "Diagnostic Procedure".
Without CONSULT-II
1. Turn ignition switch "ON".
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results) with ECM.
4. If 1st trip DTC is detected, go toEC-482, "
MALFUNCTION E AND F"in "Diagnostic Procedure".
PROCEDURE FOR MALFUNCTION F
With CONSULT-II
1. Turn ignition switch "ON".
SEF058Y
SEF058Y

EC-478
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DTC P0120 TP SENSOR
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 10 seconds.
4. Turn ignition switch "ON".
5. Repeat steps 3 and 4, 32 times.
6. If 1st trip DTC is detected, go toEC-482, "
MALFUNCTION E
AND F"in "Diagnostic Procedure".
Without CONSULT-II
1. Turn ignition switch "ON".
2. Turn ignition switch "OFF", wait at least 10 seconds and then turn "ON".
3. Repeat step 2, 32 times.
4. Perform "Diagnostic Test Mode II (Self-diagnostic results) with ECM.
5. If 1st trip DTC is detected, go toEC-482, "
MALFUNCTION E AND F"in "Diagnostic Procedure".
SEF058Y

DTC P0120 TP SENSOR
EC-479
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EC
Wiring DiagramEBS00BGM
TBWA0058E

EC-480
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DTC P0120 TP SENSOR
Diagnostic Procedure
EBS00BGN
MALFUNCTIONING A, B, C, AND D
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch “ON”.
3. Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
lHarness for short between ECM and electric throttle control actuator
lHarness for short between ECM and accelerator pedal position sensor
lHarness for short between ECM and mass air flow sensor
lHarness for short between ECM and power steering pressure sensor
lHarness for short between ECM and refrigerant pressure sensor
lECM pin terminal
>> Repair short to ground or short to power in harness or connectors.
PBIB0494E
PBIB0497E
Voltage: Approximately 5V
PBIB0082E

DTC P0120 TP SENSOR
EC-481
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4.CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between electric throttle control actuator terminal 5 and engine ground.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 73 and electric throttle control actuator terminal 4, ECM
terminal 74 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK THROTTLE POSITION SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect joint connector-4.
3. Check the following.
–Continuity between joint connector-4 terminal 1 and engine ground
–Joint connector-4
(Refer toPG-29, "
Harness Layout".)
Refer to Wiring Diagram.
4. Also check harness for short to power.
5. Then reconnect joint connector-4.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to power in harness or connectors.
7.CHECK THROTTLE POSITION SENSOR
Refer toEC-482, "
Component Inspection".
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.Continuity should exist.
Continuity should exist.
Continuity should exist.

EC-482
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DTC P0120 TP SENSOR
8.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. PerformEC-396, "
Throttle Valve Closed Position Learning".
3. PerformEC-396, "
Idle Air Volume Learning".
>>INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Refer toEC-453, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
MALFUNCTION E AND F
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch “OFF”.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and
the housing.
OK or NG
OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. PerformEC-396, "
Throttle Valve Closed Position Learning".
3. PerformEC-396, "
Idle Air Volume Learning".
>>INSPECTION END
Component InspectionEBS00BGO
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. PerformEC-396, "
Throttle Valve Closed Position Learning".
3. Turn ignition switch "ON".
4. Set selector lever to "D" position (A/T models) or "1st" position (M/T models).
PBIB0518E