Page 505 of 3833
DTC P0122, P0123 TP SENSOR
EC-155
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2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-157, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
Page 506 of 3833
EC-156
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DTC P0122, P0123 TP SENSOR
Wiring Diagram
EBS00M2Z
TBWA0181E
Page 507 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual DTC P0122, P0123 TP SENSOR
EC-157
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gro NISSAN X-TRAIL 2001 Service Repair Manual DTC P0122, P0123 TP SENSOR
EC-157
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gro](/manual-img/5/57405/w960_57405-506.png)
DTC P0122, P0123 TP SENSOR
EC-157
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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.
Diagnostic ProcedureEBS00M30
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
65 R Sensor's power supply[Ignition switch “ON”]Approximately 5V
73 W Throttle position sensor 1[Ignition switch “ON”]
●Engine stopped
●Shift lever position is “D” (A/T model)
●Shift lever position is “1st” (M/T model)
●Accelerator pedal fully releasedMore than 0.36V
[Ignition switch “ON”]
●Engine stopped
●Shift lever position is “D” (A/T model)
●Shift lever position is “1st” (M/T model)
●Accelerator pedal fully depressedLess than 4.75V
74 G Throttle position sensor 2[Ignition switch “ON”]
●Engine stopped
●Shift lever position is “D” (A/T model)
●Shift lever position is “1st” (M/T model)
●Accelerator pedal fully releasedLess than 4.75V
[Ignition switch “ON”]
●Engine stopped
●Shift lever position is “D” (A/T model)
●Shift lever position is “1st” (M/T model)
●Accelerator pedal fully depressedMore than 0.36V
PBIB0494E
Page 508 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-158
[QR25(WITH EURO-OBD)]
DTC P0122, P0123 TP SENSOR
2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition sw NISSAN X-TRAIL 2001 Service Repair Manual EC-158
[QR25(WITH EURO-OBD)]
DTC P0122, P0123 TP SENSOR
2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition sw](/manual-img/5/57405/w960_57405-507.png)
EC-158
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DTC P0122, P0123 TP SENSOR
2. CHECK THROTTLE POSITION SENSOR 2 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 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3. CHECK THROTTLE POSITION SENSOR 2 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 >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
●Harness for open or short between electric throttle control actuator and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between 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.
PBIB0494E
Voltage: Approximately 5V
PBIB0082E
Continuity should exist.
Continuity should exist.
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![NISSAN X-TRAIL 2001 Service Repair Manual DTC P0122, P0123 TP SENSOR
EC-159
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6.CHECK THROTTLE POSITION SENSOR
Refer to EC-159, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> GO T NISSAN X-TRAIL 2001 Service Repair Manual DTC P0122, P0123 TP SENSOR
EC-159
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6.CHECK THROTTLE POSITION SENSOR
Refer to EC-159, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> GO T](/manual-img/5/57405/w960_57405-508.png)
DTC P0122, P0123 TP SENSOR
EC-159
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6.CHECK THROTTLE POSITION SENSOR
Refer to EC-159, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. PerformEC-39, "
Throttle Valve Closed Position Learning" .
3. Perform EC-39, "
Idle Air Volume Learning" .
>>INSPECTION END
8.CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00M31
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-39, "
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).
5. Check voltage between ECM terminals 73 (TP sensor 1), 74 (TP
sensor 2) and engine ground under the following conditions.
6. If NG, replace electric throttle control actuator and go to the next
step.
7. Perform EC-39, "
Throttle Valve Closed Position Learning" .
8. Perform EC-39, "
Idle Air Volume Learning" .
Remove and InstallationEBS00M32
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-16, "INTAKE MANIFOLD" .
Terminal Accelerator pedal Voltage
73
(Throttle position sensor 1)Fully released More than 0.36V
Fully depressed Less than 4.75V
74
(Throttle position sensor 2)Fully released Less than 4.75V
Fully depressed More than 0.36V
PBIB0559E
Page 510 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-160
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DTC P0127 IAT SENSOR
DTC P0127 IAT SENSOR
PFP:22630
Component DescriptionEBS00M33
The intake air temperature sensor is built into mass air flow sensor.
The sensor detect NISSAN X-TRAIL 2001 Service Repair Manual EC-160
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DTC P0127 IAT SENSOR
DTC P0127 IAT SENSOR
PFP:22630
Component DescriptionEBS00M33
The intake air temperature sensor is built into mass air flow sensor.
The sensor detect](/manual-img/5/57405/w960_57405-509.png)
EC-160
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DTC P0127 IAT SENSOR
DTC P0127 IAT SENSOR
PFP:22630
Component DescriptionEBS00M33
The intake air temperature sensor is built into mass air flow sensor.
The sensor detects intake air temperature and transmits a signal to
the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.
*: These data are reference values and are measured between ECM terminal 84
(Intake air temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS00M34
DTC Confirmation ProcedureEBS00M35
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road
test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Wait until engine coolant temperature is less than 90°C (194°F)
a. Turn ignition switch “ON”.
SEC266C
Intake air
temperature°C (°F)Vo lta g e * V R e s i s ta n c e kΩ
25 (77) 3.32 1.9 - 2.1
80 (176) 1.23 0.31 - 0.37
SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127
0127Intake air temperature
too highRationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage signal
from engine coolant temperature sensor.
●Harness or connectors
(The sensor circuit is open or shorted)
●Intake air temperature sensor
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![NISSAN X-TRAIL 2001 Service Repair Manual DTC P0127 IAT SENSOR
EC-161
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b. Select “DATA MONITOR” mode with CONSULT-II.
c. Check the engine coolant temperature.
d. If the engine coolant tempera NISSAN X-TRAIL 2001 Service Repair Manual DTC P0127 IAT SENSOR
EC-161
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b. Select “DATA MONITOR” mode with CONSULT-II.
c. Check the engine coolant temperature.
d. If the engine coolant tempera](/manual-img/5/57405/w960_57405-510.png)
DTC P0127 IAT SENSOR
EC-161
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b. Select “DATA MONITOR” mode with CONSULT-II.
c. Check the engine coolant temperature.
d. If the engine coolant temperature is not less than 90°C (194°F),
turn ignition switch “OFF” and cool down engine.
●Perform the following steps before engine coolant tempera-
ture is above 90°C (194°F).
2. Turn ignition switch “ON”.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 con-
secutive seconds.
6. If 1st trip DTC is detected, go to EC-161, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “With CONSULT-II” above.
Diagnostic ProcedureEBS00M36
1.CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to EC-161, "
Component Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Replace mass air flow sensor (with intake air temperature sensor).
2.CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
Refer to EC-140, "
Wiring Diagram" .
>>INSPECTION END
Component InspectionEBS00M37
INTAKE AIR TEMPERATURE SENSOR
1. Check resistance between intake air temperature sensor termi-
nals 3 and 5 under the following conditions.
< Reference data >
2. If NG, replace mass air flow sensor (with intake air temperature
sensor).
SEF058Y
SEC266C
Intake air temperature °C (°F) Resistance kΩ
25 (77) 1.9 - 2.1
SEF012P
Page 512 of 3833
EC-162
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DTC P0127 IAT SENSOR
Removal and Installation
EBS00M38
MASS AIR FLOW SENSOR
Refer to EM-14, "AIR CLEANER AND AIR DUCT" .