Nissan Frontier. Manual - part 398

 

  Index      Nissan     Nissan Frontier (2014 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  396  397  398  399   ..

 

 

Nissan Frontier. Manual - part 398

 

 

P0075 IVT CONTROL SOLENOID VALVE

EC-163

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2. Check resistance between intake valve timing control solenoid

valve as follows.

If NG, replace intake valve timing control solenoid valve.

If OK, go to next step.

3. Remove intake valve timing control solenoid valve.

4. Provide 12V DC between intake valve timing control solenoid

valve terminals and then interrupt it. Make sure that the plunger

moves as shown in the figure.

CAUTION:

Never apply 12V DC continuously for 5 seconds or more.

Doing so may result in damage to the coil in intake valve

timing control solenoid valve.

If NG, replace intake valve timing control solenoid valve.

NOTE:

Always replace O-ring when intake valve timing control

solenoid valve is removed.

Terminal

Resistance

1 and 2

7.0 - 7.7

Ω [at 20°C (68°F)]

1 or 2 and ground

∞Ω

(Continuity should not exist.)

PBIB0193E

PBIB2275E

EC-164

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0101 MAF SENSOR

P0101 MAF SENSOR

Component Description

INFOID:0000000009480801

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 greater air flow, 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.

On Board Diagnosis Logic

INFOID:0000000009480802

NOTE:

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

DTC Confirmation Procedure

INFOID:0000000009480803

1.

PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-

dure 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 

EC-165, "Diagnosis Procedure"

.

NO

>> INSPECTION END

PBIA9559J

DTC No.

Trouble diagnosis

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0101

MAF SEN/CIRCUIT-B1
[Mass air flow (MAF) sensor cir-
cuit range/performance]

• A high voltage from the sensor is sent to 

ECM under light load driving condition.

• A low voltage from the sensor is sent to 

ECM under heavy load driving condition.

• Harness or connectors

(The sensor circuit is open or short-
ed.)

• Intake air leaks (e.g. poor connection)
• MAF sensor
• EVAP control system pressure sensor
• Intake air temperature sensor

Selector lever

Suitable position

Vehicle speed

40 km/h (25 MPH) or more

P0101 MAF SENSOR

EC-165

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Diagnosis Procedure

INFOID:0000000009480804

1.

CHECK INTAKE SYSTEM

Check the following items to see the installation condition and the connection condition of the joint.

• Air duct

• Vacuum hoses

• Intake air passage between air duct and intake manifold
OK or NG

OK

>> GO TO 2.

NG

>> Reconnect or replace error-detected parts.

2.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten two ground screws on the body. Refer to 

EC-149, "Ground Inspection"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace ground connections.

3.

CHECK MAF SENSOR POWER SUPPLY CIRCUIT

1. Disconnect mass air flow (MAF) sensor harness connector.

2. Turn ignition switch ON.

3. Check voltage between MAF sensor terminal 2 and ground with

CONSULT or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• Harness for open or short between IPDM E/R and mass air flow sensor

• Harness for open or short between mass air flow sensor and ECM

BBIA0614E

BBIA0622E

Voltage: Battery voltage

PBIB1168E

EC-166

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0101 MAF SENSOR

>> Repair harness or connectors.

5.

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 56.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 6.

NG

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

6.

CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between MAF sensor terminal 4 and ECM terminal 58.

Refer to Wiring Diagram.

2. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 7.

NG

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

7.

CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to 

EC-177, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace intake air temperature sensor. Refer to 

EM-25, "Exploded View"

.

8.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-286, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP control system pressure sensor.

9.

CHECK MASS AIR FLOW SENSOR

Refer to 

EC-166, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace mass air flow sensor.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009480805

MASS AIR FLOW SENSOR

 With CONSULT

1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT and select “DATA MONITOR” mode.

Continuity should exist.

Continuity should exist.

 

 

 

 

 

 

 

Content   ..  396  397  398  399   ..