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Home >> Nissan-Datsun >> 2012 >> Juke AWD L4-1.6L Turbo (MR16DDT) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0101

P0101




P0101 MAF SENSOR

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P0101 is displayed with other DTC, first perform the trouble diagnosis for other DTC.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and warm it up to normal operating temperature.
2.Drive the vehicle for at least 5 seconds under the following conditions:

CAUTION:
Always drive vehicle at safe speed.





NOTE:
- The gear must be fixed while driving the vehicle.
- Keep the accelerator pedal as steady as possible during cruising.
3.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK INTAKE SYSTEM

Check the following for connection.
- Air duct
- Vacuum hoses
- Intake air passage between air duct and intake manifold
Is the inspection result normal?
YES- GO TO 2.
NO- Reconnect the parts.

2. CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect MAF sensor harness connector.
3.Turn ignition switch ON.
4.Check the voltage between MAF sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R harness connector.
3.Check the continuity between MAF sensor harness connector and IPDM E/R harness connector.





4.Also check harness for short to ground.
Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

4. CHECK MAF SENSOR GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between MAF sensor harness connector and ECM harness connector.





4.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts.

5. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT

1.Check the continuity between MAF sensor harness connector and ECM harness connector.





2.Also check harness for short to ground and to power.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts

6. CHECK INTAKE AIR TEMPERATURE SENSOR 1

Check the intake air temperature sensor 1. P0112.
Is the inspection result normal?
YES- GO TO 7.
NO- Replace MAF sensor (with intake air temperature sensor 1). Exploded View.

7. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check the EVAP control system pressure sensor. P0451.
Is the inspection result normal?
YES- GO TO 8.
NO- Replace EVAP control system pressure sensor. Exploded View.

8. CHECK MAF SENSOR

Check the MAF sensor. .
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Replace MAF sensor. Exploded View.


Component Inspection


1. CHECK MASS AIR FLOW SENSOR-I

With CONSULT
1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Start engine and warm it up to normal operating temperature.
4.Connect CONSULT and select "DATA MONITOR" mode of "ENGINE".
5.Select "MAS A/F SE-B1" and check indication.





Without CONSULT
1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Start engine and warm it up to normal operating temperature.
4.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR

1.Turn ignition switch OFF.
2.Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
-Crushed air ducts
-Malfunctioning seal of air cleaner element
-Uneven dirt of air cleaner element
-Improper specification of intake air system parts
Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK MASS AIR FLOW SENSOR-II

With CONSULT
1.Repair or replace malfunctioning part.
2.Start engine and warm it up to normal operating temperature.
3.Connect CONSULT and select "DATA MONITOR" mode of "ENGINE".
4.Select "MAS A/F SE-B1" and check indication.





Without CONSULT
1.Repair or replace malfunctioning part.
2.Start engine and warm it up to normal operating temperature.
3.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 4.

4. CHECK MASS AIR FLOW SENSOR-III

With CONSULT
1.Turn ignition switch OFF.
2.Disconnect mass air flow sensor harness connector and reconnect it again.
3.Start engine and warm it up to normal operating temperature.
4.Connect CONSULT and select "DATA MONITOR" mode of "ENGINE".
5.Select "MAS A/F SE-B1" and check indication.





Without CONSULT
1.Turn ignition switch OFF.
2.Disconnect mass air flow sensor harness connector and reconnect it again.
3.Start engine and warm it up to normal operating temperature.
4.Check the voltage between ECM harness connector and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Clean or replace mass air flow sensor. Exploded View.
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