Nissan Frontier D22. Manual - part 591

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-

FIRE

EC-1467

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

17. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

EC-1468

[VG33ER]

DTC P0327, P0328 KS

DTC P0327, P0328 KS

PFP:22060

Component Description

UBS00DWU

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.

On Board Diagnosis Logic

UBS00DWV

The MIL will not light up for these diagnoses.

DTC Confirmation Procedure

UBS00DWW

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

 WITH CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

2.

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

3.

If DTC is detected, go to  

EC-1470, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II”.

SEF332I

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.

SEF058Y

DTC P0327, P0328 KS

EC-1469

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DWX

BBWA0512E

EC-1470

[VG33ER]

DTC P0327, P0328 KS

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 the ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DWY

1. 

CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check resistance between ECM terminal 64 and engine ground.

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

Ω.

4.

Also check harness for short to ground and short to power

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2. 

CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II

1.

Disconnect knock sensor harness connector.

2.

Check harness continuity between ECM terminal 64 and knock sensor terminal 1. Refer to Wiring Dia-
gram.

3.

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

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connector F37, F101

●

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.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

64

W

Knock sensor

[Engine is running]

●

Idle speed

Approximately 2.5V

Resistance: Approximately 500-620 k

Ω [at 25°C (77°F)]

Continuity should exist.