Nissan Frontier. Manual - part 634

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-1107

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

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P0075, P0081 IVT CONTROL SOLENOID VALVE

Component Description

INFOID:0000000009481751

Intake valve timing control solenoid valve is activated by ON/OFF

pulse duty (ratio) signals from the ECM.

The intake valve timing control solenoid valve changes the oil

amount and direction of flow through intake valve timing control unit

or stops oil flow.

The longer pulse width advances valve angle.

The shorter pulse width retards valve angle.

When ON and OFF pulse widths become equal, the solenoid valve

stops oil pressure flow to fix the intake valve angle at the control

position.

On Board Diagnosis Logic

INFOID:0000000009481752

DTC Confirmation Procedure

INFOID:0000000009481753

1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to 

EC-1107, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009481754

1.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect intake valve timing control solenoid valve harness connector.

3. Turn ignition switch ON.

PBIB1842E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0075
0075
(Bank 1)

Intake valve timing control 
solenoid valve circuit

An improper voltage is sent to the ECM 
through intake valve timing control solenoid 
valve.

• Harness or connectors

(Intake valve timing control solenoid valve 
circuit is open or shorted.)

• Intake valve timing control solenoid valve

P0081
0081
(Bank 2)

BBIA0553E

EC-1108

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

P0075, P0081 IVT CONTROL SOLENOID VALVE

4. Check voltage between intake valve timing control solenoid

valve terminal 2 and ground with CONSULT or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• Harness connectors F26, F225 (bank 1)

• Harness for open or short between intake valve timing control solenoid valve and IPDM E/R

• Harness for open or short between intake valve timing control solenoid valve and ECM

>> Repair harness or connectors.

3.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN

AND SHORT
1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 11 (bank 1) or 10 (bank 2) and intake valve timing con-

trol solenoid valve terminal 1. 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 the following.

• Harness connectors F26, F225 (bank 1)

• Harness for open and short between ECM and intake valve timing control solenoid valve

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

5.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-1108, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

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

EM-192, "Exploded

View"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009481755

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

1. Disconnect intake valve timing control solenoid valve harness connector.

Voltage: Battery voltage

PBIB0192E

Continuity should exist.

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-1109

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

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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. Check 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-1110

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR MEXICO]

P0102, P0103 MAF SENSOR

P0102, P0103 MAF SENSOR

Component Description

INFOID:0000000009481756

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 is 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:0000000009481757

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates.

DTC Confirmation Procedure

INFOID:0000000009481758

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next step.
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.

PROCEDURE FOR DTC P0102

1. Start engine and wait at least 5 seconds.

2. Check DTC.

3. If DTC is detected, go to 

EC-1111, "Diagnosis Procedure"

.

PROCEDURE FOR DTC P0103

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check DTC.

3. If DTC is detected, go to 

EC-1111, "Diagnosis Procedure"

.

If DTC is not detected, go to next step.

4. Start engine and wait at least 5 seconds.

5. Check DTC.

6. If DTC is detected, go to 

EC-1111, "Diagnosis Procedure"

.

PBIA9559J

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0102
0102

Mass air flow sensor 
circuit low input

An excessively low voltage from the sensor is sent 
to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Intake air leaks
• Mass air flow sensor

P0103
0103

Mass air flow sensor 
circuit high input

An excessively high voltage from the sensor is 
sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Mass air flow sensor

Detected items

Engine operating condition in fail-safe mode

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.