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SEF252P
Component Description
NHEC0197
The camshaft position sensor (PHASE) is located on the engine
front cover facing the camshaft sprocket. It detects the cylinder No.
signal.
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the
camshaft sprocket 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 cylinder No.
signal.
On Board Diagnosis Logic
NHEC0199
Malfunction is detected when
(Malfunction A) the cylinder No. signal is not sent to ECM for the
first few seconds during engine cranking,
(Malfunction B) the cylinder No. signal is not sent to ECM during
engine running,
(Malfunction C) the cylinder No. signal is not in the normal pattern
during engine running.
Possible Cause
NHEC0494
I Harness or connectors
[The camshaft position sensor (PHASE) circuit is open or
shorted.]
I Camshaft position sensor (PHASE)
I Starter motor (Refer to SC section.)
I Starting system circuit (Refer to SC section.)
I Dead (Weak) battery
DTC Confirmation Procedure
NHEC0200
NOTE:
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B AND C”.
I 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 bat-
tery voltage is more than 10.5V at idle.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS) (PHASE)
Component Description
EC-351
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