2001 NISSAN X-TRAIL diagram

DTC P0100 MASS AIR FLOW SENSOR (MAFS)
EC-1453
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Wiring DiagramEBS004Q5
TBWA0102E

EC-1454
[YD]
DTC P0100 MASS AIR FLOW SENSOR (MAFS)
Diagnostic Procedure
EBS004Q6
1. CHECK MAFS POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect mass air flow sensor harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between mass air flow sensor terminals 2, 4 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
●Harness for open or short between mass air flow sensor and ECM
●Harness for open or short between mass air flow sensor and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
3. Check harness continuity between mass air flow sensor terminal
3 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 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check harness for open or short between mass air flow sensor and ECM.
>> Repair open circuit or short to ground or short to power in harness or connectors.
SEF884Y
Terminal Voltage
2 Approximately 5V
4 Battery voltage
PBIB0360E
Continuity should exist.
PBIB0385E

DTC P0100 MASS AIR FLOW SENSOR (MAFS)
EC-1455
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5.CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between mass air flow sensor terminal 1 and ECM terminal A10. Refer to Wiring
Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK MASS AIR FLOW SENSOR
Refer to EC-1455, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace mass air flow sensor.
7.CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS004Q7
MASS AIR FLOW SENSOR
1. Reconnect harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal A10 (Mass air flow sensor
signal) and ground.
4. If the voltage is out of specification, disconnect MAFS harness
connector and connect it again.
Then repeat above check.
Removal and InstallationEBS008YD
MASS AIR FLOW SENSOR
Refer to EM-120, "AIR CLEANER AND AIR DUCT" . Continuity should exist.
Condition Voltage V
Ignition switch "ON" (Engine stopped.) Approx. 1.0
Idle (Engine is warmed up to normal
operating temperature.)1.0 - 2.5
2,000 rpm (Engine is warmed up to nor-
mal operating temperature.)2.1 - 2.7
PBIB0361E

DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
EC-1457
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Wiring DiagramEBS004QB
TBWA0103E

EC-1458
[YD]
DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
Diagnostic Procedure
EBS004QC
1. CHECK ECTS POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature sensor harness connec-
tor.
3. Turn ignition switch “ON”.
4. Check voltage between ECTS terminal 1 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connectors.
2. CHECK ECTS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between ECTS 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 harness or connectors.
3. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-1459, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace engine coolant temperature sensor.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
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Voltage: Approximately 5V
PBIB0080E
Continuity should exist.

EC-1462
[YD]
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
Wiring Diagram
EBS004RA
TBWA0112E

EC-1464
[YD]
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
3. CHECK ACCELERATOR PEDAL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminals 7, 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 F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair harness or connectors.
5. CHECK ACCELERATOR PEDAL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screw.
3. Check harness continuity between accelerator work unit termi-
nals 2, 8 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 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0379E
Voltage: Approximately 5V
PBIB0364E
Continuity should exist.
PBIB0385E

DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
EC-1465
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7.CHECK ACCELERATOR PEDAL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal B15 and accelerator work unit terminal 6, ECM terminal
B16 and accelerator work unit terminal 3. 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.
8.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK ACCELERATOR PEDAL POSITION SENSOR
Refer to EC-1466, "
Component Inspection" .
OK or NG
OK >> GO TO 16.
NG >> GO TO 15.
10.CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminal 5 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.Continuity should exist.
PBIB0379E
Voltage: Battery voltage
PBIB0365E