Toyota ZZT230 series, Руководство по ремонту

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01-121
DIAGNOSTlCS
-
ENGINE
DTC P1346
VVT Sensor (Camshaft Position Sensor) Cir-
cuit Range/Performance Problem
CIRCUIT DESCRIPTION
VVT sensor (W1 or W2 signal) consist of a signal plate and pickup coil.
The VV1 or W2
signal
plate has 1 tooth on
its
outer circumference and is mounted on the Intake camshafts.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The actual camshaft angle is detected by the
VVT sensor and it provides feedback to the
ECM
to control
the
intake
valve
timing in
response to during condition.
DTCNo. Detection
llem
Trouble Area
Deviation i
n
crankshaft
IXlSitk>n
seosor signal and
VVT
sensor
• Mechanical system malfunction (Skipping teeth
of
timing
bet!,
P1346
(bank 1) �� (2 tfll deleclion logic)
belt stretched)
•ECM
WIRING DIAGRAM
c
C4
Crankshaft Position Sensor
ECM
w
'
:
C1 Crankshaft Position Sensor
:
1
2
:-s.:-w� '
'
'
'
'
'
'
'
A
'
:
- - - - - - - - - - - - - - -
�
- - - -
(Shielded)
'
'
: w:
'
_ _ _
__.,
_ _ _
�
(Shielded)
NE-
A09121