Nissan Altima L32. Manual - part 415

P0327, P0328 KS

EC-781

< COMPONENT DIAGNOSIS >

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P0327, P0328 KS

Description

INFOID:0000000004349745

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:0000000004349746

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-781, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349747

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "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

F45

2

F13

67

Existed

EC-782

< COMPONENT DIAGNOSIS >

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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-782, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace knock sensor.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004349748

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 phys-

ically 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

F45

1

F13

61

Existed

Terminals

Resistance

1 and 2

Approx. 532 - 588 k

Ω [at 20°C (68°F)]

JMBIA1630ZZ

P0335 CKP SENSOR (POS)

EC-783

< COMPONENT DIAGNOSIS >

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P0335 CKP SENSOR (POS)

Description

INFOID:0000000004349749

The crankshaft position sensor (POS) is located on the oil pan facing

the gear teeth (cogs) of the signal plate. It detects the fluctuation of

the engine revolution.

The sensor consists of a permanent magnet and Hall IC.

When the engine is running, the high and low parts of the teeth

cause the gap with the sensor to change.

The changing gap causes the magnetic field near the sensor to

change.

Due to the changing magnetic field, the voltage from the sensor

changes.

The ECM receives the voltage signal and detects the fluctuation of

the engine revolution.

ECM receives the signals as shown in the figure.

DTC Logic

INFOID:0000000004349750

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 10.5V with igni-

tion switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

JMBIA0062ZZ

JMBIA0714GB

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0335

Crankshaft position sen-
sor (POS) circuit

• The crankshaft position sensor (POS) signal 

is not detected by the ECM during the first 
few seconds of engine cranking.

• The proper pulse signal from the crankshaft 

position sensor (POS) is not sent to ECM 
while the engine is running.

• The crankshaft position sensor (POS) signal 

is not in the normal pattern during engine run-
ning.

• Harness or connectors

[Crankshaft position sensor (POS) circuit 
is open or shorted.]
(Refrigerant pressure sensor circuit is 
shorted.)
(Accelerator pedal position sensor circuit 
is shorted.)
(EVAP control system pressure sensor 
circuit is shorted.)

• Crankshaft position sensor (POS)
• Refrigerant pressure sensor
• Accelerator pedal position sensor
• EVAP control system pressure sensor
• Signal plate

EC-784

< COMPONENT DIAGNOSIS >

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P0335 CKP SENSOR (POS)

1. Start engine and let it idle for at least 5 seconds.

If engine does not start, crank engine for at least 2 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-784, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349751

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-I

1. Disconnect crankshaft position (CKP) sensor (POS) harness connector.

2. Turn ignition switch ON.

3. Check the voltage between CKP sensor (POS) harness connec-

tor and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 3.

3.

CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-II

1. Turn ignition switch ON.

2. Disconnect ECM harness connector.

3. Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit.

4.

CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-III

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

CKP sensor (POS)

Ground

Voltage

Connector

Terminal

F30

1

Ground

Approx. 5V

PBIB3312E

CKP sensor (POS)

ECM

Continuity

Connector

Terminal

Connector

Terminal

F30

1

F13

76

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F13

72

Refrigerant pressure sensor

E219

1

76

CKP sensor (POS)

F30

1

E10

87

APP sensor

E40

6

91

EVAP control system pressure sensor

B41

3