Infiniti F50. Manual — part 416
DTC P0327, P0328, P0332, P0333 KS
EC-305
C
D
E
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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
EBS00MDN
1.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch “OFF”.
2.
Loose and retighten engine ground screws.
>> GO TO 2.
2.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1.
Disconnect ECM harness connector.
2.
Check resistance between ECM terminals 125, 126 and engine ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 M
Ω
.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 3.
3.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1.
Disconnect knock sensor harness connector.
2.
Check harness continuity between ECM terminal 125 and knock
sensor (bank 1) terminal 1, ECM terminal 126 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 5.
NG
>> GO TO 4.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
125
126
W
W
Knock sensor (bank 1)
Knock sensor (bank 2)
[Engine is running]
●
Idle speed
Approximately 2.5V
PBIB0011E
Resistance:
Approximately 530 - 590k
Ω
[at 20
°
C (68
°
F)]
Continuity should exist.
PBIB0021E
EC-306
DTC P0327, P0328, P0332, P0333 KS
4.
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.
5.
CHECK KNOCK SENSOR
Refer to
EC-306, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace knock sensor.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00MDO
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.
Removal and Installation
EBS00MDP
KNOCK SENSOR
Refer to
Resistance:
Approximately 530 - 590k
Ω
[at 20
°
C (68
°
F)]
SEF478Y
DTC P0335 CKP SENSOR (POS)
EC-307
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EC
DTC P0335 CKP SENSOR (POS)
PFP:23731
Component Description
EBS00MDQ
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.
CONSULT-II Reference Value in Data Monitor Mode
EBS00MDR
Specification data are reference values.
On Board Diagnosis Logic
EBS00MDS
DTC Confirmation Procedure
EBS00MDT
NOTE:
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”.
WITH CONSULT-II
1.
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2.
Crank engine for at least 2 seconds and run it for at least 5 sec-
onds at idle speed.
3.
If 1st trip DTC is detected, go to
EC-311, "Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to next step.
4.
Maintaining engine speed at more than 800 rpm for at least 5
seconds.
5.
If 1st trip DTC is detected, go to
EC-311, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB0562E
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED·
●
Run engine and compare the CONSULT-II value with 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
SEF058Y
EC-308
DTC P0335 CKP SENSOR (POS)
Wiring Diagram
EBS00MDU
TBWM0154E
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