NISSAN X-TRAIL 2003 Electronic Repair Manual

FUEL PUMP CIRCUIT
EC-357
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
9.CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 29 and fuel pump relay terminal 2.
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.
lHarness connectors B1, M17 (LHD models)
lHarness connectors B2, M18 (RHD models)
lHarness connectors M61, F41
lHarness for open or short between ECM and fuel pump relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 .CHECK FUEL PUMP RELAY
Refer toEC-357, "
Component Inspection".
OK or NG
OK >> GO TO 12.
NG >> Replace fuel pump relay.
12.CHECK FUEL PUMP
Refer toEC-357, "
Component Inspection".
OK or NG
OK >> GO TO 13.
NG >> Replace fuel pump.
13.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00BDQ
FUEL PUMP RELAY
Check continuity between terminals 3 and 5 under the following con-
ditions.Continuity should exist.
Conditions Continuity
12V direct current supply
between terminals 1 and 2Ye s
No current supply No
PBIB0098E

EC-358
[QR (WITH EURO-OBD)]
FUEL PUMP CIRCUIT
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 terminals as 1 and 2.
Removal and InstallationEBS00BDR
FUEL PUMP
Refer toFL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY". Resistance: Approximately 1.0W[at 25°C(77°F)]
PBIB0658E
Resistance: Above 1MW[at 25°C(77°F)]
SEF124Y

REFRIGERANT PRESSURE SENSOR
EC-359
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionEBS00BDS
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.
ECM Terminals and Reference ValueEBS00BDT
Specification data are reference values and are measured between each terminal and body 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.
PBIB0503E
SEF099X
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engineisrunning]
lWarm-up condition
lIdle speedApproximately 0V
65 RSensor's power sup-
ply[Ignition switch “ON”]Approximately 5V
83 R/LRefrigerant pressure
sensor[Engineisrunning]
lWarm-up condition
lBoth A/C switch and blower switch are “ON”.
(Compressor operates.)1.0 - 4.0V

EC-360
[QR (WITH EURO-OBD)]
REFRIGERANT PRESSURE SENSOR
Wiring Diagram
EBS00BDU
TBWA0088E

REFRIGERANT PRESSURE SENSOR
EC-361
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Diagnostic ProcedureEBS00BDV
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 83 and ground with CON-
SULT-II or tester.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
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.
lHarness connectors E61, F38
lHarness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors. Voltage: 1.0 - 4.0V
PBIB0659E
PBIB0503E
Voltage: Approximately 5V
SEF479Y

EC-362
[QR (WITH EURO-OBD)]
REFRIGERANT PRESSURE SENSOR
4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
3. 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.
lHarness connectors E61, F38
lHarness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 83 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
3. 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.
lHarness connectors E61, F38
lHarness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationEBS00BDW
REFRIGERANT PRESSURE SENSOR
Refer toATC-123, "REFRIGERANT LINES". Continuity should exist.
Continuity should exist.

ELECTRICAL LOAD SIGNAL
EC-363
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
ELECTRICAL LOAD SIGNALPFP:25350
CONSULT-II Reference Value in Data Monitor ModeEBS00BDX
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BDY
Specification data are reference values and are measured between each terminal and body 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.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL
lIgnition switch: ONRear window defogger switch is ON
and/or lighting switch is in 2nd.ON
Rear window defogger switch is OFF
and lighting switch is OFF.OFF
HEATER FAN SW
lEngine: After warming up, idle
the engineHeater fan is operating. ON
Heater fan is not operating OFF
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
52 R/WElectrical load signal
(Rear window defog-
ger signal)[Ignition switch "ON"]
lRear window defogger switch is "ON"BATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lRear window defogger switch is "OFF"Approximately 0V
53 R/YElectrical load signal
(Headlamp signal)[Ignition switch "ON"]
lLighting switch is "2ND" positionBATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]
lLighting switch is "OFF"Approximately 0V
55 LG/BHeater fan switch sig-
nal[Ignition switch "ON"]
lHeater fan control switch is "ON"Approximately 0V
[Ignition switch "ON"]
lHeater fan control switch is "OFF"Approximately 5V

EC-364
[QR (WITH EURO-OBD)]
ELECTRICAL LOAD SIGNAL
Wiring Diagram
EBS00BDZ
TBWA0094E

ELECTRICAL LOAD SIGNAL
EC-365
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
TBWA0095E

EC-366
[QR (WITH EURO-OBD)]
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure
EBS00BE0
1.INSPECTION START
DoyouhaveCONSULT-II?
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 5.
2.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 3.
NG >> GO TO 8.
3.CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >> GO TO 4.
NG >> GO TO 12.
4.CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
Condition LOAD SIGNAL
Rear window defogger switch "ON" ON
Rear window defogger switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Lighting switch "ON" at 2nd position ON
Lighting switch "OFF" OFF
PBIB0103E
Condition LOAD SIGNAL
Heater fan control switch "ON" ON
Heater fan control switch "OFF" OFF
PBIB0103E