2001 NISSAN X-TRAIL diagram

EC-404
[QR25(WITH EURO-OBD)]
START SIGNAL
6. CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect ignition switch harness connector.
3. Check harness continuity between ECM terminal 41 and fuse block (J/B), ignition switch and fuse block
(J/B). Refer to Wiring Diagram.
4. 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
●Fuse block (J/B) connectors M1, E102
●Harness for open or short between ignition switch and fuse block (J/B)
●Harness for open or short between ECM and fuse block (J/B)
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

FUEL PUMP CIRCUIT
EC-407
[QR25(WITH EURO-OBD)]
C
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MA
EC
Wiring DiagramEBS00MBI
TBWA0333E

FUEL PUMP CIRCUIT
EC-409
[QR25(WITH EURO-OBD)]
C
D
E
F
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MA
EC
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 body ground.
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 B22, B128 (RHD models)
●Harness for open or short between fuel pump relay and condenser
●Harness for open or short between condenser and body ground
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK CONDENSER
Refer to EC-410, "
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. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness con-
nector.
3. Check harness continuity between
fuel pump relay terminal 3 and fuel pump terminal 5,
fuel pump terminal 3 and body ground.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors B22, B128 (RHD models)
●Harness for open or short between fuel pump relay and fuel pump
●Harness for open or short between fuel pump and body ground
>> Repair open circuit or short to ground or short to power in harness or connectors. Continuity should exist.
Continuity should exist.
PBIB0506E

EC-410
[QR25(WITH EURO-OBD)]
FUEL PUMP CIRCUIT
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.
●Harness connectors B1, M17 (LHD models)
●Harness connectors B2, M18 (RHD models)
●Harness connectors M61, F41
●Harness 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 to EC-410, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace fuel pump relay.
12. CHECK FUEL PUMP
Refer to EC-410, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace fuel pump.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00MBK
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

REFRIGERANT PRESSURE SENSOR
EC-413
[QR25(WITH EURO-OBD)]
C
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MA
EC
Wiring DiagramEBS00MBO
TBWA0088E

REFRIGERANT PRESSURE SENSOR
EC-415
[QR25(WITH EURO-OBD)]
C
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EC
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.
●Harness connectors E61, F38
●Harness 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.
●Harness connectors E61, F38
●Harness 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 to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationEBS00MBQ
REFRIGERANT PRESSURE SENSOR
Refer to ATC-129, "REFRIGERANT LINES" . Continuity should exist.
Continuity should exist.

ELECTRICAL LOAD SIGNAL
EC-417
[QR25(WITH EURO-OBD)]
C
D
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MA
EC
Wiring DiagramEBS00MBT
TBWA0402E

ELECTRICAL LOAD SIGNAL
EC-423
[QR25(WITH EURO-OBD)]
C
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EC
17.CHECK HEATER FAN SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect A/C AUTO AMP. harness connector.
4. Check harness continuity between ECM terminal 55 and A/C AUTO AMP. terminal 19.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 19.
NG >> GO TO 18.
18.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M62, F42
●Harness for open and short between ECM and A/C AUTO AMP.
>> Repair open circuit or short to ground or short to power in harness or connectors.
19.CHECK INTERMITTENT INCIDENT
Perform EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.