Infiniti I30 (A33). Manual - part 257
SEF254P
Component Description
NHEC0191
The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects
the crankshaft position signal (1° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the gear
teeth (cogs) will periodically change. Permeability near the sensor
also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
changed.
The ECM receives the voltage signal and detects the crankshaft
position signal (1° signal).
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0492
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
CKPS·RPM (POS)
I
Tachometer: Connect
I
Run engine and compare tachometer indication with the CONSULT-II
value.
Almost the same speed as the
CONSULT-II value.
On Board Diagnosis Logic
NHEC0193
Malfunction is detected when 1° signal is not entered to ECM for
the first few seconds during engine cranking, or 1° signal is not
entered to ECM during engine running.
Possible Cause
NHEC0493
I
Harness or connectors
(The crankshaft position sensor (POS) circuit is open or
shorted.)
I
Crankshaft position sensor (POS)
I
Starter motor (Refer to EL section.)
I
Starting system circuit (Refer to EL section.)
I
Dead (Weak) battery
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
Component Description
EC-343