Nissan Murano. Manual - part 540

EC-270

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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

For specification, refer to 

EC-536, "Idle Speed"

 and 

EC-536, "Ignition Timing"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Follow the 

EC-13, "BASIC INSPECTION : Special Repair Requirement"

.

13.

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 the continuity between A/F sensor 1 harness connector and ECM harness connector.

5.

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

6.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 14.

NO

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

14.

CHECK A/F SENSOR 1 HEATER

Refer to 

EC-160, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace malfunctioning A/F sensor 1. Refer to 

EM-38, "Exploded View"

.

15.

CHECK MASS AIR FLOW SENSOR

With CONSULT

1.

Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT.

2.

For specification, refer to 

EC-536, "Mass Air Flow Sensor"

.

With GST

1.

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

2.

For specification, refer to 

EC-536, "Mass Air Flow Sensor"

.

A/F sensor 1

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

1

F27

1

F8

45

Existed

2

49

2

F64

1

53

2

57

A/F sensor 1

Ground

Continuity

Bank

Connector

Terminal

1

F27

1

Ground

Not existed

2

2

F64

1

2

ECM

Ground

Continuity

Connector

Terminal

F8

45

Ground

Not existed

49

53

57

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

EC-271

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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-173, "Diagnosis Procedure"

.

16.

CHECK SYMPTOM TABLE

Check items on the rough idle symptom in 

EC-519, "Symptom Table"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair or replace malfunctioning part.

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-129, "CONSULT Func-

tion"

.

>> GO TO 18.

18.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-44, "Intermittent Incident"

.

>> INSPECTION END

EC-272

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0327, P0328, P0332, P0333 KS

P0327, P0328, P0332, P0333 KS

Description

INFOID:0000000009720002

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:0000000009720003

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V 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-272, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009720004

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

GI-47, "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.

P0327, P0328, P0332, P0333 KS

EC-273

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 F200, F78
• Harness for open or short between knock sensor and ECM

>> Repair open circuit, short to ground 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 F200, F78
• Harness for open or short between knock sensor and ECM

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

6.

CHECK KNOCK SENSOR

Refer to 

EC-273, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace malfunctioning knock sensor. Refer to 

EM-122, "Exploded View"

.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-44, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009720005

1.

CHECK KNOCK SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect knock sensor harness connector.

3.

Check resistance between knock sensor terminal as per the following.
NOTE:

DTC

Knock sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0327, P0328

1

F201

2

F8

67

Existed

P0332, P0333

2

F202

2

DTC

Knock sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0327, P0328

1

F201

1

F8

61

Existed

P0332, P0333

2

F202

1

62