Infiniti Q45. Manual - part 432

DTC P0327, P0328, P0332, P0333 KS

EC-367

C

D

E

F

G

H

I

J

K

L

M

A

EC

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 ECM terminals, such as the ground.

Diagnostic Procedure

NBS001W7

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 terminals 15, 36 and ground. 
Refer to Wiring Diagram.

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 the following;
ECM terminal 15 and knock sensor (bank 1) terminal 1, 
ECM terminal 36 and knock sensor (bank 2) terminal 1. 
Refer to Wiring Diagram.

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 F40, F241

●

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.

4. 

CHECK KNOCK SENSOR

Refer to 

EC-368, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace knock sensor.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

15

W

Knock sensor (bank 1)

[Engine is running]

●

Idle speed

Approximately 2.5V

36

W

Knock sensor (bank 2)

[Engine is running]

●

Idle speed

Approximately 2.5V

Resistance:

Approximately 530 - 590k

Ω

 [at 20

°

C (68

°

F)]

Continuity should exist.

PBIB0021E

EC-368

DTC P0327, P0328, P0332, P0333 KS

5. 

CHECK GROUND CONNECTIONS

Loosen and retighten three ground screws on the body.
Refer to 

EC-154, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace ground connections.

6. 

CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT

Check harness continuity between knock sensor terminal 2 and ground.
Refer to wiring Diagram.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connector F40, F241

●

Harness connector F32, E32

●

Harness for open or short between knock sensor and ground.

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

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS001W8

KNOCK SENSOR

Check resistance between knock sensor terminal 1 and ground.

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.

PBIB2417E

Continuity should exist.

Resistance:

Approximately 530 - 590k

Ω

 [at 20

°

C (68

°

F)]

SEF478Y

DTC P0327, P0328, P0332, P0333 KS

EC-369

C

D

E

F

G

H

I

J

K

L

M

A

EC

Removal and Installation

NBS001W9

KNOCK SENSOR

Refer to 

EM-83, "CYLINDER BLOCK"

 .

EC-370

DTC P0335 CKP SENSOR (POS)

DTC P0335 CKP SENSOR (POS)

PFP:23731

Component Description

NBS001WA

The crankshaft position sensor (POS) is located on A/T assembly
facing the gear teeth (cogs) of the signal plate at the end of the
crankshaft. 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.

CONSULT-II Reference Value in Data Monitor Mode

NBS001WB

Specification data are reference values.

On Board Diagnosis Logic

NBS001WC

PBIB0562E

PBIB2448E

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

●

Run engine and compare CONSULT-II value with the tachometer indication.

Almost the same speed as 
the tachometer indication.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0335
0335

Crankshaft position 
sensor (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 
running.

●

Harness or connectors
(The sensor circuit is open or shorted)

●

Crankshaft position sensor (POS)

●

Signal plate