Nissan Cube. Manual - part 315

EC-146

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

P0075 IVT CONTROL SOLENOID VALVE

2.

Provide 12 V DC between intake valve timing control solenoid
valve terminals 1 and 2, and then interrupt it. Make sure that the
plunger moves as shown in the figure.

CAUTION:

Do not apply 12 V DC continuously for 5 seconds or more.
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace intake valve timing control solenoid valve. Refer to 

EM-42, "Exploded View"

.

JMBIA2107ZZ

P0101 MAF SENSOR

EC-147

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0101 MAF SENSOR

Description

INFOID:0000000009947264

The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss. 
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.

DTC Logic

INFOID:0000000009947265

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
If engine will not start or stops soon, wait at least 10 seconds with engine stopped (Ignition switch ON) instead
of running engine at idle speed.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

1.

Start engine and warm it up to normal operating temperature.

2.

Run engine for at least 10 seconds at idle speed.

3.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-149, "Diagnosis Procedure"

.

NO-1

>> With CONSULT: GO TO 3.

NO-2

>> Without CONSULT: GO TO 5.

3.

CHECK MASS AIR FLOW SENSOR FUNCTION

1.

Turn ignition switch ON.

2.

Start engine and warm it up to normal operating temperature.
If engine cannot be started, go to 

EC-149, "Diagnosis Procedure"

.

PBIA9559J

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0101

Mass air flow sensor cir-
cuit range/performance

A)

A high voltage from the sensor is sent to 
ECM under light load driving condition.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Mass air flow sensor
• EVAP control system pressure sensor

B)

A low voltage from the sensor is sent to 
ECM under heavy load driving condition.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Intake air leaks
• Mass air flow sensor
• EVAP control system pressure sensor
• Intake air temperature sensor

EC-148

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

P0101 MAF SENSOR

3.

Select “DATA MONITOR” mode with CONSULT.

4.

Check the voltage of “MAS A/F SE-B1” with “DATA MONITOR”.

5.

Increases engine speed to about 4,000 rpm.

6.

Monitor the linear voltage rise in response to engine speed
increases.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Go to 

EC-149, "Diagnosis Procedure"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

1.

Maintain the following conditions for at least 10 consecutive seconds.

CAUTION:

Always drive vehicle at a safe speed.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-149, "Diagnosis Procedure"

.

NO

>> INSPECTION END

5.

PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

Perform component function check. Refer to 

EC-148, "Component Function Check"

.

NOTE:
Use component function check to check the overall function of the mass air flow sensor circuit. During this
check, a DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-149, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000009947266

1.

PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

 With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Select Service $01 with GST.

PBIB3457E

ENG SPEED

More than 2,000 rpm

TP SEN 1-B1

More than 1.5 V

TP SEN 2-B1

More than 1.5 V

Selector lever

Suitable position

Driving location

Driving vehicle uphill (Increased engine load) will help 
maintain the driving conditions required for this test.

P0101 MAF SENSOR

EC-149

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

Check the mass air flow sensor signal with Service $01.

4.

Check for linear mass air flow sensor signal value rise in
response to increases to about 4,000 rpm in engine speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-149, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009947267

1.

INSPECTION START

Confirm the detected malfunction (A or B). Refer to 

EC-147, "DTC Logic"

.

Which malfunction is detected?

A

>> GO TO 3.

B

>> GO TO 2.

2.

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 3.

NO

>> Reconnect the parts.

3.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to 

GI-43, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace ground connection.

4.

CHECK MAF SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect mass air flow (MAF) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between MAF sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F1
• Harness for open or short between mass air flow sensor and ECM
• Harness for open or short between mass air flow sensor and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness or connectors.

6.

CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

SEF534P

MAF sensor

Ground

Voltage

Connector

Terminal

F4

5

Ground

Battery voltage