2001 NISSAN X-TRAIL Service Repair Manual

boot fuel filter location oil dipstick glove box jump start terminals oil filter

Page 705 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P2122, P2123 APP SENSOR
EC-355
[QR25(WITH EURO-OBD)]
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EC
DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionEBS00MQH
The accelerator pedal position sensor is ins

DTC P2122, P2123 APP SENSOR
EC-355
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EC
DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionEBS00MQH
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeEBS00MQI
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM. Thus, it differs from ECM terminals voltage signal.
ECM Terminals and Reference ValueEBS00MQJ
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.
PBIB0146E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.41 - 0.72V
Accelerator pedal: Fully depressed More than 3.2V
ACCEL SEN2*
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.15 - 0.98V
Accelerator pedal: Fully depressed 2.98 - 4.9V
CLSD THL POS
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
64 OR/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 2.5V
65 R Sensor's power supply[Ignition switch “ON”]Approximately 5V
75 R/LAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.41 - 0.72V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.2V

Page 706 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-356
[QR25(WITH EURO-OBD)]
DTC P2122, P2123 APP SENSOR
On Board Diagnosis Logic
EBS00MQK
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the

EC-356
[QR25(WITH EURO-OBD)]
DTC P2122, P2123 APP SENSOR
On Board Diagnosis Logic
EBS00MQK
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 ProcedureEBS00MQL
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”.
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-358, "
Diagnostic Procedure" .
WITH GST
Follow the procedure with “WITH CONSULT-II” above.
76 W/BAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.15 - 0.48V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 1.49V
86 LAccelerator pedal position
sensor 2 ground[Ignition switch “ON”]Approximately 0V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122
2122Accelerator 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) P2123
2123Accelerator pedal position
sensor 1 circuit high inputAn excessively high voltage from the APP
sensor 1 is sent to ECM.
Engine operating 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.
SEF058Y

Page 707 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P2122, P2123 APP SENSOR
EC-357
[QR25(WITH EURO-OBD)]
C
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EC
Wiring DiagramEBS00MQM
TBWA0326E

Page 708 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-358
[QR25(WITH EURO-OBD)]
DTC P2122, P2123 APP SENSOR
Diagnostic Procedure
EBS00MQN
1. RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO

Page 709 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P2122, P2123 APP SENSOR
EC-359
[QR25(WITH EURO-OBD)]
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EC
4.CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity b

Page 710 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-360
[QR25(WITH EURO-OBD)]
DTC P2122, P2123 APP SENSOR
10. CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component Inspection

Page 711 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P2127, P2128 APP SENSOR
EC-361
[QR25(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionEBS00MQQ
The accelerator pedal position sensor is ins

DTC P2127, P2128 APP SENSOR
EC-361
[QR25(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionEBS00MQQ
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeEBS00MQR
Specification data are reference values.
*:Accelerator pedal position sensor 2 signal is converted by ECM. Thus, it differs from ECM terminal voltage.
ECM Terminals and Reference ValueEBS00MQS
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.
PBIB0146E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.41 - 0.72V
Accelerator pedal: Fully depressed More than 3.2V
ACCEL SEN2*
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.15 - 0.98V
Accelerator pedal: Fully depressed More than 2.98 - 4.9V
CLSD THL POS
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
64 OR/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 2.5V
65 R Sensor's power supply[Ignition switch “ON”]Approximately 5V
75 R/LAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.41 - 0.72V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.2V

Page 712 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-362
[QR25(WITH EURO-OBD)]
DTC P2127, P2128 APP SENSOR
On Board Diagnosis Logic
EBS00MQT
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the

EC-362
[QR25(WITH EURO-OBD)]
DTC P2127, P2128 APP SENSOR
On Board Diagnosis Logic
EBS00MQT
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 ProcedureEBS00MQU
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”.
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-364, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
76 W/BAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.15 - 0.48V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 1,49V
86 LAccelerator pedal position
sensor 2 ground[Ignition switch “ON”]Approximately 0V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2127
2127Accelerator pedal position
sensor 2 circuit low inputAn excessively low voltage from the APP
sensor 2 is sent to ECM.
●Harness or connectors
(The APP sensor 2 circuit is open or
shorted.)
●Accelerator pedal position sensor
(Accelerator pedal position sensor 2) P2128
2128Accelerator pedal position
sensor 2 circuit high inputAn excessively high voltage from the APP
sensor 2 is sent to ECM.
Engine operating 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.
SEF058Y

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