Infiniti M35/M45 Y50. Manual — part 424

DTC P0011, P0021 IVT CONTROL

EC-169

[VQ35DE]

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EC

6.

CHECK TIMING CHAIN INSTALLATION

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

Yes or No

Yes

>> Check timing chain installation. Refer to

EM-66, "TIMING CHAIN"

.

No

>> GO TO 7.

7.

CHECK LUBRICATION CIRCUIT

Refer to

EM-93, "Inspection of Camshaft Sprocket (INT) Oil Groove"

.

OK or NG

OK

>> GO TO 8.

NG

>> Clean lubrication line.

8.

CHECK INTERMITTENT INCIDENT

Refer to

EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

For Wiring Diagram, refer to

EC-366

for CKP sensor (POS) and

EC-373

for CMP sensor (PHASE).

>> INSPECTION END

Component Inspection

NBS004TY

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

NBS004TZ

INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to

EM-85, "CAMSHAFT"

.

Are there any service records that may cause timing chain misaligned?

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

EC-170

[VQ35DE]

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

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

PFP:22693

Description

NBS004U0

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

NBS004U1

Specification data are reference values.

On Board Diagnosis Logic

NBS004U2

DTC Confirmation Procedure

NBS004U3

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 10.5V and 16V at
idle.

WITH CONSULT-II

1.

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

2.

Start engine and let it idle for at least 10 seconds.

3.

If 1st trip DTC is detected, go to

EC-174, "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

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

EC-171

[VQ35DE]

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EC

Wiring Diagram

NBS004U4

BANK 1

TBWT0968E

EC-172

[VQ35DE]

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

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)

2

SB

A/F sensor 1 heater
(bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

16

G/W

A/F sensor 1 (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 3.1V

35

BR/W

Approximately 2.6V

56

G

Approximately 2.3V

75

GR

Approximately 2.3V

PBIB1584E