2001 NISSAN X-TRAIL diagram

POWER SUPPLY CIRCUIT FOR ECM
EC-1197
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
9.CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10.DETECT MALFUNCTIONING PART
Check the following.
●Harness or connectors E60, F36
●Harness for open or short between ECM relay and 10A fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals and ECM relay terminals as follows.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
12.CHECK ECM RELAY
Refer to EC-1198, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace ECM relay.
PBIB0493E
Voltage: Battery voltage
SEF860T
ECM terminal ECM relay terminal
12 7
109, 111 5
Continuity should exist.

EC-1198
[QR20(WITHOUT EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
13. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
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 14.
NG >> Repair open circuit or short to power in harness or connectors.
14. CHECK INTERMITTENT INCIDENT
Refer to EC-1192, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00N4H
ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
3. If NG, replace ECM relay.Continuity should exist.
Condition Continuity
12V direct current supply between
terminals 1 and 2Ye s
OFF No
PBIB0077E

EC-1200
[QR20(WITHOUT EURO-OBD)]
DTC U1000 CAN COMMUNICATION LINE
Wiring Diagram
EBS00N4L
TBWA0096E

DTC P0102, P0103 MAF SENSOR
EC-1205
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00N4S
TBWA0055E

DTC P0102, P0103 MAF SENSOR
EC-1207
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness for open or short between ECM relay and mass air flow sensor
●Harness for open or short between mass air flow sensor and ECM
>> Repair harness or connectors.
6.CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between MAF sensor terminal 3 and ECM terminal 80.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between MAF sensor terminal 1 and ECM terminal 72.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK MASS AIR FLOW SENSOR
Refer to EC-1208, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace mass air flow sensor.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-1192, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
Continuity should exist.

DTC P0117, P0118 ECT SENSOR
EC-1211
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00N4Z
TBWA0057E

EC-1212
[QR20(WITHOUT EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
Diagnostic Procedure
EBS00N50
1. CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature (ECT) sensor harness
connector.
3. Turn ignition switch “ON”.
4. Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
2. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between ECT sensor terminal 2 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 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-1213, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace engine coolant temperature sensor.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-1192, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
PBIB0496E
Voltage: Approximately 5V
PBIB0080E
Continuity should exist.

EC-1218
[QR20(WITHOUT EURO-OBD)]
DTC P0120 TP SENSOR
Wiring Diagram
EBS00N58
TBWA0058E