Toyota ZZT230 series Repair Manual page 332

DTC
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
the intake valve timing in response to during condition.
DTCNo.
Deviation in
P1346
(bank 1) �� (2 tfll
WIRING DIAGRAM
)
c
)
DIAGNOSTlCS
P1346 VVT Sensor (Camshaft Position Sensor) Cir-
cuit Range/Performance Problem
llem
Detection
IXlSitk>n
crankshaft
seosor signal
deleclion
logic)
C4
Crankshaft Position Sensor
:
'
C1 Crankshaft Position Sensor
:
1
'
'
A
- - - - - - - - - - - - - - -
-
ENGINE
VVT
sensor and it provides feedback to the ECM to control
sensor
VVT
• Mechanical system malfunction (Skipping teeth
and
belt stretched)
•ECM
: w :
w
'
__.,
(Shielded)
_ _ _
:-s.:-w�
'
'
2
'
'
'
'
�
:
'
(Shielded)
- - - -
Trouble Area
ECM
'
NE-
'
�
_ _ _
01-121
timing
of bet!,
A09121