2007 INFINITI QX56 Factory Service Manual

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Page 1417 of 3061

INFINITI QX56 2007 Factory Service Manual EC-334
< SERVICE INFORMATION >
DTC P0327, P0328, P0332, P0333 KS
Diagnosis Procedure
INFOID:0000000003531829
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.

Page 1418 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0327, P0328, P0332, P0333 KS
EC-335
< SERVICE INFORMATION >
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Refer to EC-143, "Ground Inspection".
OK or NG
OK >> GO TO 6.
NG >> Repair or replace ground connection

Page 1419 of 3061

INFINITI QX56 2007 Factory Service Manual EC-336
< SERVICE INFORMATION >
DTC P0335 CKP SENSOR (POS)
DTC P0335 CKP SENSOR (POS)
Component DescriptionINFOID:0000000003531832
The crankshaft position sensor (POS) is located on the A/T assem-
bly

EC-336
< SERVICE INFORMATION >
DTC P0335 CKP SENSOR (POS)
DTC P0335 CKP SENSOR (POS)
Component DescriptionINFOID:0000000003531832
The crankshaft position sensor (POS) is located on the A/T assem-
bly facing the gear teeth (cogs) of the signal plate. It detects the fluc-
tuation 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 ModeINFOID:0000000003531833
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000003531834
DTC Confirmation ProcedureINFOID:0000000003531835
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
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 ta-
chometer indication.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0335
0335Crankshaft 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
(The sensor circuit is open or shorted)
• Crankshaft position sensor (POS)
• Signal plate

Page 1420 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0335 CKP SENSOR (POS)
EC-337
< SERVICE INFORMATION >
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1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Crank engine for at least 2

Page 1421 of 3061

INFINITI QX56 2007 Factory Service Manual EC-338
< SERVICE INFORMATION >
DTC P0335 CKP SENSOR (POS)
Wiring Diagram
INFOID:0000000003531836
Specification data are reference values and are measured between each terminal and ground.
Pulse signal

Page 1422 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0335 CKP SENSOR (POS)
EC-339
< SERVICE INFORMATION >
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Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the EC

Page 1423 of 3061

INFINITI QX56 2007 Factory Service Manual EC-340
< SERVICE INFORMATION >
DTC P0335 CKP SENSOR (POS)
1. Disconnect crankshaft position (CKP) sensor (POS) harness
connector.
2. Turn ignition switch ON.
3. Check voltage between CKP sensor (POS)

Page 1424 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0335 CKP SENSOR (POS)
EC-341
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connector

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