Page 1673 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual DTC P0117, P0118 ECT SENSOR
EC-1295
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2. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine coolant temperature sensor harness connec-
tor.
2. NISSAN X-TRAIL 2003 Service Repair Manual DTC P0117, P0118 ECT SENSOR
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2. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine coolant temperature sensor harness connec-
tor.
2.](/manual-img/5/57404/w960_57404-1672.png)
DTC P0117, P0118 ECT SENSOR
EC-1295
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2. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine coolant temperature sensor harness connec-
tor.
2. Turn ignition switch ON.
3. Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connectors.
3. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECT sensor terminal 2 and ECM terminal 70. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-1296, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace engine coolant temperature sensor.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
PBIB1892E
Voltage: Approximately 5.3V
PBIB0152E
Continuity should exist.
Page 1674 of 4179
EC-1296
[YD (WITHOUT EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
Component InspectionEBS011Z1
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
2. If NG, replace engine coolant temperature sensor.
Removal and InstallationEBS011Z2
ENGINE COOLANT TEMPERATURE SENSOR
Refer to EM-196, "CYLINDER HEAD" .
PBIB2005E
Engine coolant temperature °C (°F) Resistance kΩ
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P
Page 1675 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual DTC P0122, P0123 APP SENSOR
EC-1297
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DTC P0122, P0123 APP SENSORPFP:18002
DescriptionEBS011Z3
The accelerator pedal position sensor is installed on t NISSAN X-TRAIL 2003 Service Repair Manual DTC P0122, P0123 APP SENSOR
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DTC P0122, P0123 APP SENSORPFP:18002
DescriptionEBS011Z3
The accelerator pedal position sensor is installed on t](/manual-img/5/57404/w960_57404-1674.png)
DTC P0122, P0123 APP SENSOR
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DTC P0122, P0123 APP SENSORPFP:18002
DescriptionEBS011Z3
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The ECM uses the signal to
determine the amount of fuel to be injected.
CONSULT-II Reference Value in Data Monitor ModeEBS011Z4
Specification data are reference values.
*: These signals are converted by ECM internally. Thus, these differ from ECM terminals voltage.
ECM Terminals and Reference ValueEBS011Z5
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.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL POS SEN*
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.2 - 0.7V
Accelerator pedal: Fully depressed 3.9 - 4.9V
ACCEL SEN 2*
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.1 - 0.4V
Accelerator pedal: Fully depressed 1.9 - 2.4V
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
82 BAccelerator pedal position
sensor 1 power supply[Ignition switch ON]Approximately 5.3V
83 WAccelerator pedal position
sensor 1[Ignition switch ON]
Engine stopped
Accelerator pedal: Fully released0.5 - 1.0V
[Ignition switch ON]
Engine stopped
Accelerator pedal: Fully depressed4.2 - 5.2V
84 RAccelerator pedal position
sensor 1 ground[Ignition switch ON]Approximately 0.3V
85 —Sensor ground
(Accelerator pedal posi-
tion sensor shield circuit)[Ignition switch ON]Approximately 0.3V
90 LAccelerator pedal position
sensor 2 power supply[Ignition switch ON]Approximately 5.3V
Page 1676 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-1298
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DTC P0122, P0123 APP SENSOR
On Board Diagnosis LogicEBS011Z6
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS011Z7
NOTE:
If DTC Confir NISSAN X-TRAIL 2003 Service Repair Manual EC-1298
[YD (WITHOUT EURO-OBD)]
DTC P0122, P0123 APP SENSOR
On Board Diagnosis LogicEBS011Z6
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS011Z7
NOTE:
If DTC Confir](/manual-img/5/57404/w960_57404-1675.png)
EC-1298
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DTC P0122, P0123 APP SENSOR
On Board Diagnosis LogicEBS011Z6
The MI will not light up for these self-diagnoses.
DTC Confirmation ProcedureEBS011Z7
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-1300, "
Diagnostic Procedure" .
91 GAccelerator pedal position
sensor 2[Ignition switch ON]
Engine stopped
Accelerator pedal: Fully released0.4 - 0.7V
[Ignition switch ON]
Engine stopped
Accelerator pedal: Fully depressed2.2 - 2.7V
92 YAccelerator pedal position
sensor 2 ground[Ignition switch ON]Approximately 0.3V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122Accelerator pedal position
sensor 1 circuit low inputAn excessively low voltage from the APP sensor
1 is sent to ECM.
Harness or connectors
(The APP sensor 1 circuit is open or
shorted.)
Accelerator pedal position sensor
(Accelerator pedal position sensor 1) P0123Accelerator pedal position
sensor 1 circuit high inputAn excessively high voltage from the APP sensor
1 is sent to ECM.
SEF817Y
Page 1677 of 4179
DTC P0122, P0123 APP SENSOR
EC-1299
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Wiring DiagramEBS011Z8
TBWA0567E
Page 1678 of 4179
EC-1300
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DTC P0122, P0123 APP SENSOR
Diagnostic ProcedureEBS011Z9
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws. Refer to EC-1267, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2020E
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![NISSAN X-TRAIL 2003 Service Repair Manual DTC P0122, P0123 APP SENSOR
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2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connect NISSAN X-TRAIL 2003 Service Repair Manual DTC P0122, P0123 APP SENSOR
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2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connect](/manual-img/5/57404/w960_57404-1678.png)
DTC P0122, P0123 APP SENSOR
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2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 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 APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 3 and ECM terminal 84.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 83 and APP sensor terminal 5.
Refer to Wiring Diagram.
2. 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 APP SENSOR
Refer to EC-1302, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace accelerator pedal assembly.
PBIB1893E
Voltage: Approximately 5.3V
PBIB0914E
Continuity should exist.
Continuity should exist.
Page 1680 of 4179
EC-1302
[YD (WITHOUT EURO-OBD)]
DTC P0122, P0123 APP SENSOR
6. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS011ZA
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 83 (APP sensor 1 sig-
nal), 91 (APP sensor 2 signal) and body ground under the fol-
lowing conditions.
4. If NG, replace accelerator pedal assembly.
Removal and InstallationEBS011ZB
ACCELERATOR PEDAL
Refer to ACC-2, "ACCELERATOR CONTROL SYSTEM" .
Terminal Accelerator pedal Voltage
83
(Accelerator pedal position
sensor 1)Fully released 0.5 - 1.0V
Fully depressed 4.2 - 5.2V
91
(Accelerator pedal position
sensor 2)Fully released 0.4 - 0.7V
Fully depressed 2.2 - 2.7V
MBIB0615E