Page 1217 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual FUEL PUMP CIRCUIT
EC-839
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t NISSAN X-TRAIL 2003 Service Repair Manual FUEL PUMP CIRCUIT
EC-839
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t](/manual-img/5/57404/w960_57404-1216.png)
FUEL PUMP CIRCUIT
EC-839
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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 ProcedureEBS0114R
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel hose for 1
second after ignition switch is turned ON.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel pump relay.
3. Turn ignition switch ON.
4. Check voltage between fuel pump relay terminals 1, 5 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
114 B/OR Fuel pump relay[Ignition switch: ON]
For 1 second after turning ignition switch ON
[Engine is running]0 - 1.0V
[Ignition switch: ON]
More than 1 second after turning ignition
switch ONBATTERY VOLTAGE
(11 - 14V)
PBIB1983E
PBIB1974E
Voltage: Battery voltage
MBIB0191E
Page 1218 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-840
[QR (WITHOUT EURO-OBD)]
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 be NISSAN X-TRAIL 2003 Service Repair Manual EC-840
[QR (WITHOUT EURO-OBD)]
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 be](/manual-img/5/57404/w960_57404-1217.png)
EC-840
[QR (WITHOUT EURO-OBD)]
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-842, "
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
Page 1219 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual FUEL PUMP CIRCUIT
EC-841
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8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B22, B128 (RHD models)
Harness for open or short be NISSAN X-TRAIL 2003 Service Repair Manual FUEL PUMP CIRCUIT
EC-841
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8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B22, B128 (RHD models)
Harness for open or short be](/manual-img/5/57404/w960_57404-1218.png)
FUEL PUMP CIRCUIT
EC-841
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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-842, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace fuel pump relay.
12. CHECK FUEL PUMP
Refer to EC-842, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace fuel pump.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
Page 1220 of 4179
EC-842
[QR (WITHOUT EURO-OBD)]
FUEL PUMP CIRCUIT
Component InspectionEBS0114S
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 InstallationEBS011UV
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
Page 1221 of 4179
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
Page 1222 of 4179
EC-844
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REFRIGERANT PRESSURE SENSOR
Wiring DiagramEBS0114V
TBWA0634E
Page 1223 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual 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 EC NISSAN X-TRAIL 2003 Service Repair Manual 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 EC](/manual-img/5/57404/w960_57404-1222.png)
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
Page 1224 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual 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 refrigera NISSAN X-TRAIL 2003 Service Repair Manual 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 refrigera](/manual-img/5/57404/w960_57404-1223.png)
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.