Nissan Maxima. Manual - part 423

EC-176

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0037, P0038, P0057, P0058 HO2S2 HEATER

Check resistance between HO2S2 terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning heated oxygen sensor 2. Refer to 

EM-31, "Removal and Installation (LH)"

 (LH) or 

EM-

33, "Removal and Installation (RH)"

 (RH).

CAUTION:

• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7

in) onto a hard surface such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread

Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant

(commercial service tool).

>> INSPECTION END

Terminal No.

Resistance

2 and 3

3.4 - 4.4 

Ω [at 25°C (77°F)]

1 and 2, 3, 4

∞ Ω

(Continuity should not exist)

4 and 1, 2, 3

PBIB3310E

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-177

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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EC

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P0075, P0081 IVT CONTROL SOLENOID VALVE

Description

INFOID:0000000010094879

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 via the 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.

DTC Logic

INFOID:0000000010094880

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

ing 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 let it idle for 5 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-177, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010094881

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

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

Intake valve timing control so-
lenoid valve (bank 1) circuit

An improper voltage is sent to the ECM via 
the 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

Intake valve timing control so-
lenoid valve (bank 2) circuit

EC-178

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0075, P0081 IVT CONTROL SOLENOID VALVE

4. Check the voltage between intake valve timing (IVT) control

solenoid valve harness connector and ground with CONSULT or

tester.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

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 the continuity between intake valve timing control solenoid valve harness connector and ECM har-

ness connector.

4. Also check harness for short to ground and short to power. 
Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-175, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

EM-54, "Exploded

View"

.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000010094882

1.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-I

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

2. Check resistance between intake valve timing control solenoid

valve terminals as per the following.

Is the inspection result normal?

YES

>> GO TO 2.

DTC

IVT control solenoid valve

Ground

Voltage

Bank

Connector

Terminal

P0075

1

F67

2

Ground

Battery voltage

P0081

2

F66

2

PBIB0192E

DTC

IVT control solenoid valve

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0075

1

F67

1

F13

78

Existed

P0081

2

F66

1

75

Terminals

Resistance

1 and 2

7.0 - 7.5 

Ω [at 20°C (68°F)]

1 or 2 and ground

∞Ω

(Continuity should not exist)

PBIB0193E

P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-179

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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NO

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

EM-54, "Exploded

View"

.

2.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-II

1. Remove intake valve timing control solenoid valve. Refer to 

EM-54, "Exploded View"

.

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

valve terminals 1 and 2, and then interrupt it. Check that the

plunger moves as shown in the figure.

CAUTION:

Never 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 malfunctioning intake valve timing control solenoid valve. Refer to 

EM-54, "Exploded

View"

.

JMBIA0079ZZ