Nissan X-Trail 32. Manual — part 967
P0100 MAF SENSOR
EC-997
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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P0100 MAF SENSOR
DTC Description
INFOID:0000000010935664
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (Mass air flow sensor circuit is open or shorted.)
• Mass air flow sensor
FAIL-SAFE
• EGR valve is closed position
• Throttle control motor is opened
• Prohibit DPF regeneration
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 2 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010935665
1.
CHECK MASS AIR FLOW SENSOR POWER SUPPLY CIRCUIT
Check the power supply of the mass air flow sensor.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for power supply circuit.
2.
CHECK MASS AIR FLOW SENSOR CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check mass air flow sensor circuit for open and short.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0100
AIR FLOW SENSOR CIRCUIT
(Mass or volume air flow “A” circuit)
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO HIGH
• An excessively low voltage from the sensor is sent to ECM for 2 seconds
or more.
• An excessively high voltage from the sensor is sent to ECM for 2 seconds
or more.
+
-
Voltage
Mass air flow sensor
Connector
Terminal
F152
3
Ground
5.0 V
EC-998
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P0100 MAF SENSOR
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK MASS AIR FLOW SENSOR
EC-998, "Component Inspection (Mass Air Flow Sensor)"
.
Is the inspection result normal?
YES
>> Replace error-detected parts.
NO
>> INSPECTION END
Component Inspection (Mass Air Flow Sensor)
INFOID:0000000010935666
1.
CHECK MASS AIR FLOW SENSOR
1.
Disconnect mass air flow sensor harness connector.
2.
Check resistance between mass air flow sensor terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace mass air flow sensor.
+
-
Continuity
ECM
Mass air flow sensor
Connector
Terminal
Connector
Terminal
F117
78
F152
4
Existed
82
2
Mass air flow sensor
Resistance
+
-
Terminal
3
4
2 – 10 k
Ω
P0101 MAF SENSOR
EC-999
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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P0101 MAF SENSOR
DTC Description
INFOID:0000000010935667
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors
• Mass air flow sensor
• Turbocharger boost sensor
• Intake air temperature sensor 2
• Intake air leaks
FAIL-SAFE
• EGR valve is closed position
• Throttle control motor is opened
• Prohibit DPF regeneration
DTC CONFIRMATION PROCEDURE
1.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC P0101 can not duplicate.
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010935668
1.
CHECK INTAKE SYSTEM
1.
Check air cleaner for clogging.
2.
Check the following for connection and cracks.
-
Air duct
-
Vacuum hoses
-
Intake air passage between air duct and intake manifold
-
Turbocharger
-
Turbocharger boost sensor
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning part.
2.
SOAK THE VEHICLE
1.
Soak the vehicle for 8 hours.
NOTE:
When the engine is already cold condition, proceed to next step.
2.
Turn ignition switch ON.
3.
Check that the detecting value of TC boost sensor is same as the detecting value of barometric pressure
sensor using CONSULT.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace TC boost sensor.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0101
AIR FLOW SENSOR INFORMATION
(Mass or volume air flow “A” circuit range/
performance)
• 1.DEF: SIGNAL OUTSIDE UPPER LIMIT
• 2.DEF: SIGNAL OUTSIDE LOWER LIM-
IT
ECM receives improper signal voltage sent from MAF sensor for more than
5 seconds during driving condition.
EC-1000
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P0101 MAF SENSOR
3.
CHECK COHERENCE
1.
Check coherence between intake air temperature, ambient temperature, and engine coolant temperature.
2.
Check that intake air temperature is equal to ambient air temperature (
±
10
°
C).
Is the inspection result normal?
YES
>> Replace mass air flow sensor.
NO
>> Check intermittent incident. Refer to
GI-44, "Intermittent Incident"
.
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