Page 497 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual DTC P0112, P0113 IAT SENSOR
EC-147
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Diagnostic ProcedureEBS00M2L
1.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OF NISSAN X-TRAIL 2001 Service Repair Manual DTC P0112, P0113 IAT SENSOR
EC-147
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Diagnostic ProcedureEBS00M2L
1.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OF](/manual-img/5/57405/w960_57405-496.png)
DTC P0112, P0113 IAT SENSOR
EC-147
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Diagnostic ProcedureEBS00M2L
1.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect mass air flow sensor (intake air temperature sensor
is built-into) harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between MAF sensor terminal 5 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connectors.
2.CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between MAF sensor terminal 3 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 3.
NG >> Repair harness or connectors.
3.CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to EC-148, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace mass air flow sensor (with intake air temperature sensor).
4.CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
PBIB0495E
Voltage: Approximately 5V
PBIB0066E
Continuity should exist.
Page 498 of 3833
EC-148
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DTC P0112, P0113 IAT SENSOR
Component Inspection
EBS00M2M
INTAKE AIR TEMPERATURE SENSOR
1. Check resistance between intake air temperature sensor termi-
nals 3 and 5 under the following conditions.
2. If NG, replace mass air flow sensor (with intake air temperature
sensor).
Removal and InstallationEBS00M2N
MASS AIR FLOW SENSOR
Refer to EM-14, "AIR CLEANER AND AIR DUCT" .
SEC266C
Intake air temperature °C (°F) Resistance kΩ
25 (77) 1.9 - 2.1
SEF012P
Page 499 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-149
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DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00M2O
The engine coolant temperature sensor is used to d NISSAN X-TRAIL 2001 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-149
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DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00M2O
The engine coolant temperature sensor is used to d](/manual-img/5/57405/w960_57405-498.png)
DTC P0117, P0118 ECT SENSOR
EC-149
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DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00M2O
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.
*: These data are reference values and are measured between ECM terminal 93
(Engine coolant temperature sensor) 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.
On Board Diagnosis LogicEBS00M2P
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEF594K
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
−10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P0117
0117Engine coolant
temperature sen-
sor circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Engine coolant temperature sensor
P0118
0118Engine coolant
temperature sen-
sor circuit high
inputAn excessively high voltage from the sensor is
sent to ECM.
Page 500 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-150
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DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00M2Q
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF NISSAN X-TRAIL 2001 Service Repair Manual EC-150
[QR25(WITH EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00M2Q
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF](/manual-img/5/57405/w960_57405-499.png)
EC-150
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DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00M2Q
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.
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-152, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Detected items Engine operating condition in fail-safe mode
Engine coolant temper-
ature sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning ignition switch “ON”
or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or Start 40°C (104°F)
More than approx. 4 minutes after ignition ON or
Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.
SEF058Y
Page 501 of 3833
DTC P0117, P0118 ECT SENSOR
EC-151
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Wiring DiagramEBS00M2R
TBWA0057E
Page 502 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-152
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DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS00M2S
1. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant tempe NISSAN X-TRAIL 2001 Service Repair Manual EC-152
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DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS00M2S
1. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant tempe](/manual-img/5/57405/w960_57405-501.png)
EC-152
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DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS00M2S
1. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature (ECT) sensor harness
connector.
3. Turn ignition switch “ON”.
4. Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
2. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between ECT sensor terminal 2 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 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-153, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace engine coolant temperature sensor.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
PBIB0496E
Voltage: Approximately 5V
PBIB0080E
Continuity should exist.
Page 503 of 3833
DTC P0117, P0118 ECT SENSOR
EC-153
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Component InspectionEBS00M2T
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
*: These data are reference values and are measured between ECM terminal
93 (Engine coolant temperature sensor) and ground.
2. If NG, replace engine coolant temperature sensor.
Removal and InstallationEBS00M2U
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-20, "THERMOSTAT AND WATER CONTROL VALVE" .
PBIB0081E
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
−10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
Page 504 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-154
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DTC P0122, P0123 TP SENSOR
DTC P0122, P0123 TP SENSOR
PFP:16119
Component DescriptionEBS00M2V
Electric Throttle Control Actuator consists of throttle control motor, NISSAN X-TRAIL 2001 Service Repair Manual EC-154
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DTC P0122, P0123 TP SENSOR
DTC P0122, P0123 TP SENSOR
PFP:16119
Component DescriptionEBS00M2V
Electric Throttle Control Actuator consists of throttle control motor,](/manual-img/5/57405/w960_57405-503.png)
EC-154
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DTC P0122, P0123 TP SENSOR
DTC P0122, P0123 TP SENSOR
PFP:16119
Component DescriptionEBS00M2V
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 ModeEBS00M2W
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
On Board Diagnosis LogicEBS00M2X
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureEBS00M2Y
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:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch “ON”.
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
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122
0122Throttle position sensor
2 circuit low inputAn excessively low voltage from the TP sensor
2 is sent to ECM.
●Harness or connectors
(The TP sensor 2 circuit is open or
shorted.)
●Electric throttle control actuator
(TP sensor 2) P0123
0123Throttle position sensor
2 circuit high inputAn excessively high voltage from the TP sen-
sor 2 is sent to ECM.
Engine operation condition in fail-safe mode
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.