sensor 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 screws on the body.
Refer to EC-131, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2021E

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. 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.

DTC P2138 APP SENSOR
EC-415
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5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK >> GO TO 6.
NG >> Repair short to ground or short to power in harness or connectors.
6. CHECK THROTTLE POSITION SENSOR
Refer to EC-416, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 7.
7. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-46, "
Throttle Valve Closed Position Learning" .
3. Perform EC-46, "
Idle Air Volume Learning" .
>>INSPECTION END
8. CHECK APP SENSOR 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 82, APP sensor terminal 1
and ECM terminal 83.
Refer to Wiring Diagram.
4. 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.
9. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between APP sensor terminal 5 and ECM terminal 106, APP sensor terminal 2
and ECM terminal 98.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
ECM terminal Sensor terminal Reference Wiring Diagram
91 APP sensor terminal 4EC-409
47 Electric throttle control actuator terminal 1EC-293
Continuity should exist.
Continuity should exist.

EC-416
[QR (WITH EURO-OBD)]
DTC P2138 APP SENSOR

10. CHECK APP SENSOR
Refer to EC-416, "
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-45, "
Accelerator Pedal Released Position Learning" .
3. Perform EC-46, "
Throttle Valve Closed Position Learning" .
4. Perform EC-46, "
Idle Air Volume Learning" .
>>INSPECTION END
12. CHECK INTERMITTENT INCIDENT
Refer to EC-123, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS010V4
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-45, "
Accelerator Pedal Released Position Learning" .
6. Perform EC-46, "
Throttle Valve Closed Position Learning" .
7. Perform EC-46, "
Idle Air Volume Learning" .
Removal and InstallationEBS010V5
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-434
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VIAS

VIASPFP:14956
DescriptionEBS011HT
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the
effective suction port length is equivalent to the total length of the intake manifold collector's suction port
including the intake valve. This long suction port provides increased air intake which results in improved suc-
tion efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is running at high speed, the ECM sends the
signal to the VIAS control solenoid valve. This signal introduces the intake manifold vacuum into the power
valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided indepen-
dently for each cylinder. This shortened port length results in enhanced engine output with reduced suction
resistance under high speeds.
COMPONENT DESCRIPTION
Power Valve
The power valve is installed in intake manifold collector and used to
control the suction passage of the variable induction air control sys-
tem. It is set in the fully closed or fully opened position by the power
valve actuator operated by the vacuum stored in the surge tank. The
vacuum in the surge tank is controlled by the VIAS control solenoid
valve.
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
VIAS control VIAS control solenoid valve Mass air flow sensor Amount of intake air
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Engine coolant temperature sensor Engine coolant temperature
PBIB0843E
PBIB0946E

FUEL PUMP CIRCUIT
EC-443
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FUEL PUMP CIRCUITPFP:17042
DescriptionEBS010VH
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS010VI
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
PBIB0513E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF

EC-448
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FUEL PUMP CIRCUIT

3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors M17, B1

Fuse block (J/B) connector M1

15A fuse

Harness for open or short between fuel pump relay and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check harness continuity between fuel pump relay terminal 3 and condenser terminal 1, condenser termi-
nal 2 and ground.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors B22, B128 (RHD models)

Harness for open or short between fuel pump relay and condenser

Harness for open or short between condenser and ground
>> Repair open circuit or short to ground or short to power in harness connectors.
6. CHECK CONDENSER
Refer to EC-450, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace condenser.
7. CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
2. Check harness continuity between fuel pump relay terminal 3
and “fuel level sensor unit and fuel pump” terminal 5, “fuel level
sensor unit and fuel pump” terminal 3 and ground.
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.Continuity should exist.
Continuity should exist.PBIB0506E

FUEL PUMP CIRCUIT
EC-449
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8. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors B22, B128 (RHD models)

Harness for open or short between fuel pump relay and “fuel level sensor unit and fuel pump”

Harness for open or short between “fuel level sensor unit and fuel pump” and ground
>> Repair open circuit or short to ground or short to power in harness connectors.
9. CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between fuel pump relay terminal 2 and ECM terminal 114.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors B1, M17 (LHD models)

Harness connectors B2, M18 (RHD models)

Harness for open or short between fuel pump relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK FUEL PUMP RELAY
Refer to EC-450, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace fuel pump relay.
12. CHECK FUEL PUMP
Refer to EC-450, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace fuel pump.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-123, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-450
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FUEL PUMP CIRCUIT

Component InspectionEBS010VL
FUEL PUMP RELAY
Check continuity between terminals 3 and 5 under the following con-
ditions.
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 3 and 5.
CONDENSER
1. Turn ignition switch OFF
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminal 1 and 2.
Removal and InstallationEBS010VM
FUEL PUMP
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Conditions Continuity
12V direct current supply between terminals
1 and 2Ye s
No current supply No
PBIB0098E
Resistance: Approximately 0.2 - 5.0Ω [at 25°C
(77°F)]
PBIB0658E
Resistance: Above 1MΩ [at 25°C (77°F)]
MBIB0031E

REFRIGERANT PRESSURE SENSOR
EC-451
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REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionEBS010VN
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
PBIB0503E
SEF099X