2003 NISSAN X-TRAIL ACCELERATOR PEDAL PEDAL POSITION SENSOR

DTC P2135 TP SENSOR
EC-761
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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 following terminals.
OK or NG
OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors.
5. CHECK APP SENSOR
Refer to EC-770, "
Component Inspection" .
OK or NG
OK >> GO TO 11
NG >> GO TO 6.
6. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-507, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-508, "
Throttle Valve Closed Position Learning" .
4. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
7. CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 49, elec-
tric throttle control actuator terminal 2 and ECM terminal 68.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
ECM terminal Sensor terminal Reference Wiring Diagram
47 Electric throttle control actuator terminal 1EC-757
91 APP sensor terminal 4EC-765
Continuity should exist.
Continuity should exist.

EC-762
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DTC P2135 TP SENSOR

9. CHECK THROTTLE POSITION SENSOR
Refer to EC-762, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-508, "
Throttle Valve Closed Position Learning" .
3. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0112U
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-508, "
Throttle Valve Closed Position Learning" .
3. Turn ignition switch ON.
4. Set selector lever to D position (A/T) or 1st position (M/T).
5. Check voltage between ECM terminals 49 (TP sensor 1 signal),
68 (TP sensor 2 signal) and ground under the following condi-
tions.
6. If NG, replace electric throttle control actuator and go to the next
step.
7. Perform EC-508, "
Throttle Valve Closed Position Learning" .
8. Perform EC-508, "
Idle Air Volume Learning" .
Removal and InstallationEBS0112V
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-17, "INTAKE MANIFOLD" .
Terminal Accelerator pedal Voltage
49
(Throttle position sensor 1)Fully released More than 0.36V
Fully depressed Less than 4.75V
68
(Throttle position sensor 2)Fully released Less than 4.75V
Fully depressed More than 0.36V
MBIB0022E

DTC P2138 APP SENSOR
EC-763
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DTC P2138 APP SENSORPFP:18002
Component DescriptionEBS0112W
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 ModeEBS0112X
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 LogicEBS0112Y
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-720, "
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.

EC-766
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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 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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
47 RSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V
82 R/YSensor ground
(Accelerator pedal position
sensor 1)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
83 LSensor ground
(Accelerator pedal position
sensor 2)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
90 RSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch: ON]Approximately 5V
91 BR/YSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch: ON]Approximately 5V
98 B/WAccelerator pedal position
sensor 2[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.15 - 0.6V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressed1.95 - 2.4V
106 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 depressed3.9 - 4.7V

EC-768
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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. 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 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 4.
4. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 4 and ECM terminal 91.
Refer to Wiring Diagram.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace open circuit.
PBIB0498E
Voltage: Approximately 5V
PBIB0914E
Voltage: Approximately 5V
PBIB0915E
Continuity should exist.

EC-770
[QR (WITHOUT EURO-OBD)]
DTC P2138 APP SENSOR

10. CHECK APP SENSOR
Refer to EC-770, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform EC-507, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-508, "
Throttle Valve Closed Position Learning" .
4. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
12. CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS01132
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.
4. If NG, replace accelerator pedal assembly and go to the next
step.
5. Perform EC-507, "
Accelerator Pedal Released Position Learning" .
6. Perform EC-508, "
Throttle Valve Closed Position Learning" .
7. Perform EC-508, "
Idle Air Volume Learning" .
Removal and InstallationEBS01133
ACCELERATOR PEDAL
Refer to ACC-2, "ACCELERATOR CONTROL SYSTEM" .
Terminal Accelerator pedal Voltage
106
(Accelerator pedal position
sensor 1)Fully released 0.5 - 1.0V
Fully depressed 3.9 - 4.7V
98
(Accelerator pedal position
sensor 2)Fully released 0.15 - 0.6V
Fully depressed 1.95 - 2.4V
MBIB0023E

EC-794
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HO2S2

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.
Diagnostic ProcedureEBS0113U
1. CHECK OVERALL FUNCTION-I
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 16 (HO2S2 signal) and ground.
6. Check the voltage while revving up to 4,000 rpm under no load
at least 10 times. (Depress and release the accelerator pedal as
quickly as possible.)
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK OVERALL FUNCTION-II
Keep engine at idle for 10 minutes, then check the voltage between ECM terminal 16 (HO2S2 signal) and
ground, or check voltage when coasting 80 km/h (50 MPH) in 3rd gear (M/T) or D position (A/T) with “OD”
OFF.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
16 OR/B Heated oxygen sensor 2[Engine is running]

Warm-up condition

Revving engine from idle to 3,000 rpm quickly
after the following conditions are met
–Keeping the engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load0 - Approximately 1.0V
74 BSensor ground
(Heated oxygen sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
The voltage does not remain in the range of 0.2 - 0.4V
MBIB0020E
The voltage does not remain in the range of 0.2 - 0.4V

HO2S2
EC-797
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6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.50V at least once when the “FUEL INJECTION” is −25%.
CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-II
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed at between 3,500 and 4,000 rpm for at least 1 minute under no
load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 16 (HO2S2 signal) and ground.
6. Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V at least once during this
procedure.
If the voltage is above 0.68V at step 6, step 7 is not neces-
sary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or check
the voltage when coasting from 80 km/h (50 MPH) in D position
with “OD” OFF (A/T). 3rd gear position (M/T).
The voltage should be below 0.50V at least once during this
procedure.
8. If NG, replace heated oxygen sensor 2.
CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Removal and InstallationEBS0113W
HEATED OXYGEN SENSOR 2
Refer to EX-2, "EXHAUST SYSTEM" .
PBIB0551E
MBIB0020E