NISSAN X-TRAIL 2003 Service Repair Manual

REFRIGERANT PRESSURE SENSOR
EC-843
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REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionEBS0114U
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

EC-844
[QR (WITHOUT EURO-OBD)]
REFRIGERANT PRESSURE SENSOR

Wiring DiagramEBS0114V
TBWA0634E

REFRIGERANT PRESSURE SENSOR
EC-845
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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 ProcedureEBS0114W
1. CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch ON.
3. Check voltage between ECM terminal 69 and ground with CON-
SULT-II or tester.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
46 RSensor power supply
(Refrigerant pressure sensor)[Ignition switch: ON]Approximately 5V
57 BSensor ground
(Intake air temperature sensor/
Power steering pressure sensor/
Refrigerant pressure sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
69 L Refrigerant pressure sensor[Engine is running]

Warm-up condition

Both A/C switch and blower switch are ON.
(Compressor operates.)1.0 - 4.0V
Voltage: 1.0 - 4.0V
MBIB0035E

EC-846
[QR (WITHOUT EURO-OBD)]
REFRIGERANT PRESSURE SENSOR

2. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch OFF.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.
4. Turn ignition switch ON.
5. Check voltage between refrigerant pressure sensor terminal 3
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E61, F38

Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 57.
Refer to Wiring Diagram.
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 E61, F38

Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0503E
Voltage: Approximately 5V
SEF479Y
Continuity should exist.

REFRIGERANT PRESSURE SENSOR
EC-847
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6. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between refrigerant pressure sensor terminal 2 and ECM terminal 69.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E61, F38

Harness for open or short between refrigerant pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationEBS0114X
REFRIGERANT PRESSURE SENSOR
Refer to ATC-141, "REFRIGERANT LINES" . Continuity should exist.

EC-848
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

ELECTRICAL LOAD SIGNALPFP:25350
CONSULT-II Reference Value in Data Monitor ModeEBS0114Z
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL

Ignition switch: ONRear window defogger switch is ON and/or
lighting switch is 2nd.ON
Rear window defogger switch is OFF and light-
ing switch is OFF.OFF
HEATER FAN SW

Ignition switch: ONHeater fan is operating ON
Heater fan is not operating OFF

ELECTRICAL LOAD SIGNAL
EC-849
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Wiring DiagramEBS01150
LHD MODELS
TBWA0635E

EC-850
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

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)
84 L/YElectrical load signal
(Headlamp signal)[Ignition switch: ON]

Lighting switch: 2nd positionBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Lighting switch: OFFApproximately 0V
96 LG/B Heater fan switch[Engine is running]

Heater fan switch: ONApproximately 0V
[Engine is running]

Heater fan switch: OFFBATTERY VOLTAGE
(11 - 14V)

ELECTRICAL LOAD SIGNAL
EC-851
[QR (WITHOUT EURO-OBD)]
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TBWA0636E

EC-852
[QR (WITHOUT EURO-OBD)]
ELECTRICAL LOAD SIGNAL

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)
93 BRElectrical load signal
(Rear window defogger
signal)[Ignition switch: ON]

Rear window defogger switch: ONBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Rear window defogger switch: OFFApproximately 0V