2001 NISSAN X-TRAIL fuse diagram

EC-660
[QR25(WITHOUT EURO-OBD)]
HO2S1 HEATER
3. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 2 and HO2S1 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-661, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-506, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

HO2S2 HEATER
EC-665
[QR25(WITHOUT EURO-OBD)]
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EC
3.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 4 and HO2S2 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to EC-666, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 2.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-506, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-688
[QR25(WITHOUT EURO-OBD)]
IGNITION SIGNAL
8. DETECT MALFUNCTIONING PART
Check the following.
●20A fuse
●Harness or connectors E61, F38
●Harness for open and short between ECM relay and fuse
>> Repair or replace harness or connectors.
9. CHECK ECM RELAY
Refer to EC-512, "
Component Inspection" .
OK or NG
OK >> GO TO 17.
NG >> Replace ECM relay.
10. CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check harness continuity between ECM terminal 12 and con-
denser terminal 1, condenser terminal 2 and engine ground.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
11 . CHECK CONDENSER
Refer to EC-690, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace condenser.Continuity should exist.
PBIB0509E

EC-712
[QR25(WITHOUT EURO-OBD)]
INJECTOR CIRCUIT
3. CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M61, F41
●Harness connectors F1, F101
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 101, 102, 103, 104.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
PBIB0510E
Voltage: Battery voltage
PBIB0582E
Continuity should exist.

VIAS
EC-719
[QR25(WITHOUT EURO-OBD)]
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5.CHECK VACUUM TANK
Refer to EC-720, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace vacuum tank.
6.CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “ON”.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between VIAS control solenoid valve terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness continuity between fuse and VIAS control solenoid valve
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 25 and VIAS control solenoid valve terminal 2. 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.
PBIB0947E
Voltage: Battery voltage
PBIB0173E
Continuity should exist.

START SIGNAL
EC-725
[QR25(WITHOUT EURO-OBD)]
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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.

EC-850
[QR20(WITH EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
3. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M61, F41
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between ECM and fuse
>> Repair harness or connectors.
4. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 59, 60, 106, 108 and engine ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or connectors.
5. CHECK POWER SUPPLY-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1, 6 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.Continuity should exist.
PBIB0493E
SEF420X

POWER SUPPLY CIRCUIT FOR ECM
EC-851
[QR20(WITH EURO-OBD)]
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6.DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●20A fuse
●Harness connectors E60, F36
●Harness connectors E61, F38
●Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 20 and ECM relay terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> Go to EC-1074, "IGNITION SIGNAL" .
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 109, 111 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 13.
NG (Battery voltage does not exist.)>>GO TO 9.
NG (Battery voltage exists for more than a few seconds.)>>GO TO 11. Continuity should exist.
Voltage: After turning ignition switch "OFF", battery
voltage will exist for a few seconds, then
drop approximately 0V.
PBIB0536E