2003 NISSAN X-TRAIL Service Repair Manual

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Page 785 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2135 TP SENSOR
EC-407
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4. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the

Page 786 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-408
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DTC P2135 TP SENSOR

9. CHECK THROTTLE POSITION SENSOR
Refer to EC-408, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. REPLACE ELECTRIC THROTTLE CO

Page 787 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2138 APP SENSOR
EC-409
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DTC P2138 APP SENSORPFP:18002
Component DescriptionEBS010UY
The accelerator pedal position sensor is installed on the upper

DTC P2138 APP SENSOR
EC-409
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DTC P2138 APP SENSORPFP:18002
Component DescriptionEBS010UY
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 ModeEBS010UZ
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis LogicEBS010V0
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-368, "
DTC P1229 SENSOR POWER SUPPLY" .
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
Ignition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.0 - 4.7V
ACCEL SEN2*
Ignition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.3 - 1.2V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS
Ignition switch: ONAccelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138
2138Accelerator pedal position sensor
circuit range/performance problemRationally incorrect voltage is sent to ECM
compared with the signals from APP sensor
1 and APP sensor 2.
Harness or connector
(APP sensor 1 and 2 circuit is open
or shorted.)
(TP sensor circuit is shorted.)
Accelerator pedal position sensor 1
and 2
Electric throttle control actuator
(TP sensor 1 and 2)
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.

Page 788 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-410
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DTC P2138 APP SENSOR

DTC Confirmation ProcedureEBS010V1
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
lea

Page 789 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2138 APP SENSOR
EC-411
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Wiring DiagramEBS010V2
TBWB0265E

Page 790 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-412
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DTC P2138 APP SENSOR

Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in

Page 791 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2138 APP SENSOR
EC-413
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Diagnostic ProcedureEBS010V3
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground

Page 792 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-414
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DTC P2138 APP SENSOR

2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Ch

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