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DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
EC-1459
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Component InspectionEBS004QD
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
*: These data are measured between ECM terminal A11 (Engine coolant tem-
perature sensor) and body ground.
2. If NG, replace engine coolant temperature sensor.
Removal and InstallationEBS008YF
ENGINE COOLANT TEMPERATURE SENSOR
Refer to EM-182, "CYLINDER HEAD" .
PBIB0081E
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 1810 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-1460
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
PFP:18002
DescriptionEBS004R5
The accelerator work unit is installed on the upper end of NISSAN X-TRAIL 2001 Service Repair Manual EC-1460
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
PFP:18002
DescriptionEBS004R5
The accelerator work unit is installed on the upper end of](/manual-img/5/57405/w960_57405-1809.png)
EC-1460
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
PFP:18002
DescriptionEBS004R5
The accelerator work unit is installed on the upper end of the accelerator pedal assembly. The accelerator
pedal position sensor 1, 2 and accelerator pedal released position switch are built into the accelerator work
unit. The sensors detect the accelerator pedal position and sends a signal to the ECM. The ECM uses the sig-
nal to determine the amount of fuel to be injected.
The accelerator pedal released position switch detects accelerator pedal released position and sends the sig-
nal to the ECM. The ECM will then determine engine idle conditions. The signal is also used for diagnosing the
accelerator pedal position sensor.
CONSULT-II Reference Value in Data Monitor ModeEBS004R6
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differ from ECM terminals voltage.
ECM Terminals and Reference ValueEBS004R7
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.
PBIB0463E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL POS SEN
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.8 - 1.3V
Accelerator pedal: fully depressed More than 3.5V
ACCEL SEN 2*
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.3 - 1.8V
Accelerator pedal: fully depressed More than 3.0V
OFF ACCEL SW
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released ON
Accelerator pedal: slightly
depressed OFF
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A21 BAccelerator pedal
released position switch
ground[Ignition switch “ON”]Approximately 0V
A22 LGAccelerator pedal position
sensor 1 ground[Ignition switch “ON”]Approximately 0V
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EC-1461
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On Board Diagnosis LogicEBS004R8
DTC Confirmation ProcedureEBS004R9
WITH CONSULT-II
1. Turn ignition switch “ON” NISSAN X-TRAIL 2001 Service Repair Manual DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
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On Board Diagnosis LogicEBS004R8
DTC Confirmation ProcedureEBS004R9
WITH CONSULT-II
1. Turn ignition switch “ON”](/manual-img/5/57405/w960_57405-1810.png)
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
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On Board Diagnosis LogicEBS004R8
DTC Confirmation ProcedureEBS004R9
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Depress and release fully accelerator pedal slowly.
4. If DTC is detected, go to EC-1463, "
Diagnostic Procedure" .
A26 LG/RAccelerator pedal position
sensor 2 ground[Ignition switch “ON”]Approximately 0V
A28 PU/RAccelerator pedal position
sensor 1 power supply [Ignition switch “ON”]Approximately 5V
B15 WAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.8 - 1.3V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.5V
B16 GAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.3 - 1.8V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.0V
B23 GY/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 5V
D14 G/YAccelerator pedal
released position switch[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal slightly depressedBATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully releasedApproximately 0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
DTC Malfunction is detected when ... Check Items (Possible Cause)
P0120
●An improper voltage signal from accelerator pedal
position sensor 1 and/or 2 is send to ECM.●Harness or connectors
(The sensor circuit is open or shorted.)
●Accelerator pedal position sensor 1
●Accelerator pedal position sensor 2
●Accelerator pedal released position switch
SEF817Y
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EC-1462
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
Wiring Diagram
EBS004RA
TBWA0112E
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
EC-1463
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Diagnostic ProcedureEBS004RB
1.CHECK ACCELERATOR PEDAL POSITION SENSOR FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “ACCEL POS SEN” and “ACCEL SEN 2” in “DATA MONITOR” mode with CONSULT-II.
3. Check “ACCEL POS SEN” and “ACCEL SEN 2” signal under
the following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH FUNCTION
With CONSULT-II
1. Select “OFF ACCEL SW” in “DATA MONITOR” mode with CONSULT-II.
2. Check “OFF ACCEL SW” signal under the following conditions.
OK or NG
OK >> GO TO 16.
NG >> GO TO 10.
Conditions ACCEL POS SEN ACCEL SEN 2
Accelerator pedal fully
released 0.8 - 1.3V 0.3 - 1.8V
Accelerator pedal fully
depressedMore than 3.5V More than 3.0V
PBIB0403E
Conditions OFF ACCEL SW
Accelerator pedal fully released ON
Accelerator pedal depressed OFF
PBIB0404E
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![NISSAN X-TRAIL 2001 Service Repair Manual EC-1464
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
3. CHECK ACCELERATOR PEDAL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness NISSAN X-TRAIL 2001 Service Repair Manual EC-1464
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
3. CHECK ACCELERATOR PEDAL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness](/manual-img/5/57405/w960_57405-1813.png)
EC-1464
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
3. CHECK ACCELERATOR PEDAL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminals 7, 1 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair harness or connectors.
5. CHECK ACCELERATOR PEDAL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screw.
3. Check harness continuity between accelerator work unit termi-
nals 2, 8 and engine ground. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0379E
Voltage: Approximately 5V
PBIB0364E
Continuity should exist.
PBIB0385E
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7.CHECK ACCELERATOR PEDAL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connecto NISSAN X-TRAIL 2001 Service Repair Manual DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
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7.CHECK ACCELERATOR PEDAL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connecto](/manual-img/5/57405/w960_57405-1814.png)
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
EC-1465
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7.CHECK ACCELERATOR PEDAL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal B15 and accelerator work unit terminal 6, ECM terminal
B16 and accelerator work unit terminal 3. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK ACCELERATOR PEDAL POSITION SENSOR
Refer to EC-1466, "
Component Inspection" .
OK or NG
OK >> GO TO 16.
NG >> GO TO 15.
10.CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminal 5 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.Continuity should exist.
PBIB0379E
Voltage: Battery voltage
PBIB0365E
Page 1816 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-1466
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
11 . DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between accelerator work unit NISSAN X-TRAIL 2001 Service Repair Manual EC-1466
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
11 . DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between accelerator work unit](/manual-img/5/57405/w960_57405-1815.png)
EC-1466
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DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
11 . DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between accelerator work unit and ECM
>> Repair harness or connectors.
12. CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH GROUND CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between accelerator work unit terminal 4 and ECM terminal A21. Refer to Wir-
ing Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> GO TO 13.
13. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH
Refer to EC-1466, "
Component Inspection" .
OK or NG
OK >> GO TO 16.
NG >> GO TO 15.
15. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator work unit.
2. Perform EC-1404, "
Accelerator Pedal Released Position Learning" .
>>INSPECTION END
16. CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS004RC
ACCELERATOR PEDAL POSITION SENSOR
With CONSULT-II
1. Reconnect all disconnected harness connectors.
2. Turn ignition switch “ON”.Continuity should exist.