Infiniti M35/M45 Y50. Manual - part 471

 

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Infiniti M35/M45 Y50. Manual - part 471

 

 

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-

FIRE

EC-357

[VQ35DE]

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EC

14. 

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect corresponding A/F sensor 1 harness connector.

3.

Disconnect ECM harness connector.

4.

Check harness continuity between the following terminals.
Refer to Wiring Diagram.

5.

Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

6.

Also check harness for short to power.

OK or NG

OK

>> GO TO 15.

NG

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

15. 

CHECK A/F SENSOR 1 HEATER

Refer to 

EC-176, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> GO TO 16.

A/F sensor 1 terminal

ECM terminal

Bank 1

1

16

2

75

5

35

6

56

Bank 2

1

76

2

77

5

57

6

58

Continuity should exist.

Bank 1

Bank 2

A/F sensor 1 terminal

ECM terminal

A/F sensor 1 terminal

ECM terminal

1

16

1

76

2

75

2

77

5

35

5

57

6

56

6

58

Continuity should not exist.

PBIB2794E

EC-358

[VQ35DE]

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-

FIRE

16. 

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1.

CAUTION:

●

Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

>> INSPECTION END

17. 

CHECK MASS AIR FLOW SENSOR

With CONSULT-II

1.

Install all removed parts.

2.

Start engine and warm it up to normal operating temperature.

3.

Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-II.

 With GST

1.

Install all removed parts.

2.

Start engine and warm it up to normal operating temperature.

3.

Check mass air flow sensor signal in Service $01 with GST.

OK or NG

OK

>> GO TO 18.

NG

>> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or

ground. Refer to 

EC-193, "DTC P0101 MAF SENSOR"

 .

18. 

CHECK SYMPTOM MATRIX CHART

Check items on the rough idle symptom in 

EC-99, "Symptom Matrix Chart"

 .

OK or NG

OK

>> GO TO 19.

NG

>> Repair or replace.

19. 

ERASE THE 1ST TRIP DTC

Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to 

EC-68, "HOW TO ERASE

EMISSION-RELATED DIAGNOSTIC INFORMATION"

 .

>> GO TO 20.

20. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

2.0 - 6.0 g·m/sec:

at idling

7.0 - 20.0 g·m/sec:

at 2,500 rpm

2.0 - 6.0 g·m/sec:

at idling

7.0 - 20.0 g·m/sec:

at 2,500 rpm

DTC P0327, P0328 KS

EC-359

[VQ35DE]

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DTC P0327, P0328 KS

PFP:22060

Component Description

NBS004YP

The knock sensor is attached to the cylinder block. It senses engine
knocking using a piezoelectric element. A knocking vibration from
the cylinder block is sensed as vibrational pressure. This pressure is
converted into a voltage signal and sent to the ECM.

On Board Diagnosis Logic

NBS004YQ

The MIL will not light up for these diagnoses.

DTC Confirmation Procedure

NBS004YR

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 more than 10V at idle.

 WITH CONSULT-II

1.

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

2.

Start engine and run it for at least 5 seconds at idle speed.

3.

If 1st trip DTC is detected, go to 

EC-361, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB1564E

DTC No.

Trouble diagnosis 

name

DTC detected condition

Possible cause

P0327
0327

Knock 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.)

●

Knock sensor

P0328
0328

Knock sensor circuit 
high input

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

SEF058Y

EC-360

[VQ35DE]

DTC P0327, P0328 KS

Wiring Diagram

NBS004YS

TBWT0960E

 

 

 

 

 

 

 

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