Infiniti FX35 / FX45. Manual - part 388

 

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Infiniti FX35 / FX45. Manual - part 388

 

 

DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306 MULTIPLE CYLINDER 

MISFIRE, NO. 1 - 6 CYLINDER MISFIRE

EC-313

< SERVICE INFORMATION >

[VQ35DE]

C

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EC

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NG

>> Follow the 

EC-80, "Basic Inspection"

.

14.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect 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 or short to ground.

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 AIR FUEL RATIO (A/F) SENSOR 1 HEATER

Refer to 

EC-158, "Component Inspection"

.

OK or NG

OK

>> GO TO 16.

NG

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

16.

CHECK MASS AIR FLOW SENSOR

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.

PBIB2093E

EC-314

< SERVICE INFORMATION >

[VQ35DE]

DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306 MULTIPLE CYLINDER 

MISFIRE, NO. 1 - 6 CYLINDER MISFIRE

 With CONSULT-III

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

 With GST

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

OK or NG

OK

>> GO TO 17.

NG

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

ground. Refer to 

EC-175

.

17.

CHECK SYMPTOM MATRIX CHART

Check items on the rough idle symptom in 

EC-96, "Symptom Matrix Chart"

.

OK or NG

OK

>> GO TO 18.

NG

>> Repair or replace.

18.

ERASE 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-55, "Emission-Related

Diagnostic Information"

.

>> GO TO 19.

19.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

>> 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-315

< SERVICE INFORMATION >

[VQ35DE]

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DTC P0327, P0328 KS

Component Description

INFOID:0000000001326134

The knock sensor (KS) 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 pres-
sure is converted into a voltage signal and sent to the ECM.

On Board Diagnosis Logic

INFOID:0000000001326135

The MIL will not light up for these self-diagnoses.

DTC Confirmation Procedure

INFOID:0000000001326136

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.

1.

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

2.

Check 1st trip DTC.

3.

If 1st trip DTC is detected, go to 

EC-317, "Diagnosis Procedure"

.

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

(Knock 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.

EC-316

< SERVICE INFORMATION >

[VQ35DE]

DTC P0327, P0328 KS

Wiring Diagram

INFOID:0000000001326137

Specification data are reference values and are measured between each terminal and ground.

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.

TBWM0296E

 

 

 

 

 

 

 

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