Infiniti M35/M45 Y50. Manual - part 602

DTC P0011, P0021 IVT CONTROL

EC-881

[VK45DE]

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EC

12. 

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-881, "Component Inspection"

 .

OK or NG

OK

>> GO TO 13.

NG

>> Replace intake valve timing control solenoid valve.

13. 

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-1081, "Component Inspection"

 .

OK or NG

OK

>> GO TO 14.

NG

>> Replace crankshaft position sensor (POS).

14. 

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-1088, "Component Inspection"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Replace camshaft position sensor (PHASE).

15. 

CHECK CAMSHAFT SPROCKET

Check accumulation of debris to the signal pick-up portion of the camshaft sprocket. Refer to 

EM-215, "CAM-

SHAFT"

 .

OK or NG

OK

>> GO TO 16.

NG

>> Remove debris and clean the signal pick-up cutout of camshaft sprocket.

16. 

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?

Yes or No

Yes

>> Check timing chain installation. Refer to 

EM-203, "TIMING CHAIN"

 .

No

>> GO TO 17.

17. 

CHECK LUBRICATION CIRCUIT

Refer to 

EM-223, "Inspection of Camshaft Sprocket (INT) Oil Groove"

 .

OK or NG

OK

>> GO TO 18.

NG

>> Clean lubrication line.

18. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS005BF

INTAKE VALVE TIMING CONTROL POSITION SENSOR

1.

Disconnect intake valve timing control position sensor harness connector.

2.

Loosen the fixing bolt of the sensor.

3.

Remove the sensor.

EC-882

[VK45DE]

DTC P0011, P0021 IVT CONTROL

4.

Visually check the sensor for chipping.

5.

Check resistance as shown below.

6.

If NG, replace intake valve timing control position sensor.

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

NBS005BG

INTAKE VALVE TIMING CONTROL POSITION SENSOR

Refer to 

EM-203, "TIMING CHAIN"

 .

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EM-203, "TIMING CHAIN"

 .

SEF362Z

Terminal No. (Polarity)

Resistance 

Ω

 [at 25

°

C (77

°

F)]

3 (+) - 1 (-)

Except 0 or 

∞

2 (+) - 1 (-)

3 (+) - 2 (-)

PBIB0194E

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

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER

EC-883

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EC

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER

PFP:22693

Description

NBS005BH

SYSTEM DESCRIPTION

The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element at the specified range.

CONSULT-II Reference Value in Data Monitor Mode

NBS005BI

Specification data are reference values.

On Board Diagnosis Logic

NBS005BJ

DTC Confirmation Procedure

NBS005BK

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 11V and 16V at
idle.

 WITH CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

2.

Wait at least 5 seconds.

3.

If 1st trip DTC is detected, go to 

EC-887, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)

Engine speed

Air fuel ratio (A/F) sensor 1 
heater control

Air fuel ratio (A/F) sensor 1 
heater

Mass air flow sensor

Amount of intake air

MONITOR ITEM

CONDITION

SPECIFICATION

A/F S1 HTR (B1)
A/F S1 HTR (B2)

●

Engine: After warming up, idle the engine

0 - 100%

 DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0031
0031
(Bank 1)

Air fuel ratio (A/F) sensor 1 
heater control circuit low

The current amperage in the A/F sensor 1 heater 
circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM 
through the A/F sensor 1 heater.)

●

Harness or connectors
(The A/F sensor 1 heater circuit is 
open or shorted.)

●

A/F sensor 1 heater

P0051
0051
(Bank 2)

P0032
0032
(Bank 1)

Air fuel ratio (A/F) sensor 1 
heater control circuit high

The current amperage in the A/F sensor 1 heater 
circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM 
through the A/F sensor 1 heater.)

●

Harness or connectors
(The A/F sensor 1 heater circuit is 
shorted.)

●

A/F sensor 1 heater

P0052
0052
(Bank 2)

SEF058Y

EC-884

[VK45DE]

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER

Wiring Diagram

NBS005BL

BANK 1

TBWT1033E