Infiniti G35 (V35) Sedan. Manual - part 526

EC-250

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE

Is the measurement value within the specification?

YES

>> GO TO 16.

NO

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

ground. Refer to 

EC-167, "Diagnosis Procedure"

.

16.

CHECK SYMPTOM MATRIX CHART

Check items on the rough idle symptom in 

EC-531, "Symptom Table"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair or replace.

17.

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-101, "Diagnosis Descrip-

tion"

.

>> GO TO 18.

18.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

2.0 - 6.0 g·m/sec:

at idling

7.0 - 20.0 g·m/sec:

at 2,500 rpm

P0327, P0328, P0332, P0333 KS

EC-251

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

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P0327, P0328, P0332, P0333 KS

Description

INFOID:0000000000956638

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.

DTC Logic

INFOID:0000000000956639

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

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

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-251, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000956640

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-42, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Disconnect knock sensor harness connector and ECM harness connector.

2.

Check the continuity between knock sensor harness connector and ECM harness connector.

DTC No.

Trouble diagnosis 

name

DTC detected condition

Possible cause

P0327

Knock sensor (bank 1) 
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

Knock sensor (bank 1) 
circuit high input

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

P0332

Knock sensor (bank 2) 
circuit low input

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

P0333

Knock sensor (bank 2) 
circuit high input

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

EC-252

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0327, P0328, P0332, P0333 KS

3.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F9, F201
• Harness for open or short between knock sensor and ECM

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

4.

CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between knock sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F9, F201
• Harness for open or short between ECM and knock sensor

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

6.

CHECK KNOCK SENSOR

Refer to 

EC-252, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace malfunctioning knock sensor.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000000956641

1.

CHECK KNOCK SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect knock sensor harness connector.

3.

Check resistance between knock sensor terminals as follows.
NOTE:

DTC

Knock sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0327, P0328

1

F203

2

F102

72

Existed

P0332, P0333

2

F202

2

DTC

Knock sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0327, P0328

1

F203

1

F102

73

Existed

P0332, P0333

2

F202

1

69

P0327, P0328, P0332, P0333 KS

EC-253

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

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F

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EC

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P

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It is necessary to use an ohmmeter which can measure more than 10 M

Ω

.

CAUTION:

Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning knock sensor.

Terminals

Resistance

1 and 2

Approx. 532 - 588 k

Ω

 [at 20

°

C (68

°

F)]