Infiniti M35/M45 Y50. Manual - part 429

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-189

[VQ35DE]

C

D

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EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

10

W/G

Intake valve timing control 
solenoid valve (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Warm-up condition

●

When revving engine up to 2,000rpm 
quickly

7 - 12V

111

SB

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition 
switch OFF

0 - 1.5V

[Ignition switch: OFF]

●

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

119

120

R
R

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

PBIB1790E

EC-190

[VQ35DE]

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

Diagnostic Procedure

NBS004UL

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.

4.

Check voltage between intake valve timing control solenoid
valve terminal 2 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E12, F3

●

Harness connectors E18, F201 (bank 1)

●

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

>> Repair open circuit or short to ground or short to power in 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 the following;
ECM terminal 11 and intake valve timing control solenoid valve (bank 1) terminal 1 or
ECM terminal 10 and intake valve timing control solenoid valve (bank 2) 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.

Voltage: Battery voltage

PBIB1562E

PBIB0192E

Continuity should exist.

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-191

[VQ35DE]

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EC

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F201, F18 (bank 1)

●

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

>> 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-192, "Component Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning intake valve timing control solenoid valve.

6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

EC-192

[VQ35DE]

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

Component Inspection

NBS004UM

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

1.

Disconnect intake valve timing control solenoid valve harness connector.

2.

Check resistance between intake valve timing control solenoid
valve terminals 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:

Do not 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.

Removal and Installation

NBS004UN

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EM-85, "CAMSHAFT"

 .

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

PBIB2275E