Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg cip1345
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DI-1 19
DIAGNOSTICS - ENGINE
DI6VJ-02
DTC P1345 VVT Sensor/Camshaft Position Sensor Cir-
cuit Malfunction
CIRCUIT DESCRIPTION
VVT sensor (VVT signal) consist of a signal plate and pickup coil.
The VVT 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.
DTC No. DTC Detecting Condition Trouble Area
No VVT sensor signal to ECM during cranking at 4 sec. or
more
S Open or short in VVT sensor circuit
No VVT sensor signal to ECM with 5 sec. or more engine
P13450 S VVT sensor
speed 600 rpm or more
S ECM
While the crankshaft rotates twice, VVT sensor signal will be
input to ECM 5 times
WIRING DIAGRAM
C1
Camshaft Position Sensor ECM
18
1 B G2
E7
2 W
(Shielded)
16
2 W W NE-
E7
17
1 O NE
E7 E1
C2 (Shielded) BR
Crankshaft Position Sensor EB
A09056
2002 ECHO (RM884U)
Author : Date : 289
DI-120
DIAGNOSTICS - ENGINE
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean
or rich, etc. at the time of the malfunction.
1 Check resistance of VVT sensor (See page IG-1 ).
Reference: INSPECTION USING OSCILLOSCOPE
G2 Signal Waveform 5 V/ During cranking or idling, check between terminals G2 and
Division NE-, and NE+ and NE- of the ECM connector.
G2 NE- HINT:
S The correct waveform is as shown.
S The waveform frequency is shortened as the engine
NE+ NE- speed becomes higher.
20 msec./Division A03961 NG Replace VVT sensor.
OK
2 Check for open and short in harness and connector between ECM and VVT sen-
sor (See page IN-29 ).
NG Repair or replace harness or connector.
OK
3 Inspect sensor installation.
NG Tighten sensor.
OK
Check and replace ECM (See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 290
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