Nissan Qashqai (2007-2010). Manual - part 321

P0300, P0301, P0302, P0303, P0304 MISFIRE

EC-803

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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7.

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.
Is the inspection result normal?

YES

>> Replace spark plug(s) with standard type one(s). For

spark plug type, refer to 

EM-160, "Removal and Installa-

tion"

.

NO

>> Repair or clean spark plug. Then GO TO 8.

8.

CHECK FUNCTION OF IGNITION COIL-III

1.

Reconnect the initial spark plugs.

2.

Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded portion.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to 

EM-160, "Removal

and Installation"

.

9.

CHECK COMPRESSION PRESSURE

Check compression pressure. Refer to 

EM-142, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.

10.

CHECK FUEL PRESSURE

1.

Install all removed parts.

2.

Release fuel pressure to zero. Refer to 

EC-978, "Inspection"

.

3.

Install fuel pressure gauge and check fuel pressure. Refer to 

EC-978, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging.

Is the inspection result normal?

YES

>> Replace “fuel filter and fuel pump assembly”.

NO

>> Repair or replace.

12.

CHECK IGNITION TIMING

For procedure, refer to 

EC-642, "BASIC INSPECTION : Special Repair Requirement"

.

For specification, refer to 

EC-981, "Idle Speed"

 and 

EC-981, "Ignition Timing"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Follow the 

EC-646, "IGNITION TIMING : Special Repair Requirement"

.

13.

CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to 

EC-776, "Component Inspection"

.

Is the inspection result normal?

SEF156I

Spark should be generated.

At idling: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

EC-804

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0300, P0301, P0302, P0303, P0304 MISFIRE

YES

>> GO TO 14.

NO

>> Replace heated oxygen sensor 1.

14.

CHECK MASS AIR FLOW SENSOR

With CONSULT-III

Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-III.
For specification, refer to 

EC-981, "Mass Air Flow Sensor"

.

With GST

Check mass air flow sensor signal in Service $01 with GST.
For specification, refer to 

EC-981, "Mass Air Flow Sensor"

.

Is the measurement value within the specification?

YES

>> GO TO 15.

NO

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

ground. Refer to 

EC-746, "DTC Logic"

.

15.

CHECK SYMPTOM TABLE

Check items on the rough idle symptom in 

EC-967, "Symptom Table"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Repair or replace.

16.

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-706, "Diagnosis Descrip-

tion"

.

>> GO TO 17.

17.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

P0327, P0328 KS

EC-805

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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P0327, P0328 KS

Description

INFOID:0000000001089376

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:0000000001089377

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-807, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001089378

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E21. Refer to Ground Inspection in 

GI-41, "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 disconnect ECM harness connector.

2.

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

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

DTC No.

Trouble diagnosis 

name

DTC detected condition

Possible cause

P0327

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

Knock sensor circuit 
high input

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

Knock sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F12

2

F8

40

Existed

EC-806

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0327, P0328 KS

3.

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 4.

NO

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

4.

CHECK KNOCK SENSOR

Refer to 

EC-808, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace knock sensor.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001089379

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:
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 knock sensor.

Knock sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F12

1

F8

37

Existed

Terminals

Resistance [at 20

°

C (68

°

F)]

1 and 2

Approx. 532 - 588 k

Ω