Toyota Sequoia (2005). Manual — part 103
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DIAGNOSTICS
ENGINE
DI–215
409
4
Inspect teeth of sensor plate.
PREPARATION:
Remove the crankshaft angle sensor plate (See page
CHECK:
Check the teeth of sensor plate.
NG
Replace sensor plate.
OK
Replace ECM (See page
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DI–216
–
DIAGNOSTICS
ENGINE
410
DTC
P0340
Camshaft Position Sensor ”A” Circuit
(Bank 1 or Single Sensor)
DTC
P0341
Camshaft Position Sensor ”A” Circuit Range/Per-
formance (Bank 1 or Single Sensor)
DTC
P0345
Camshaft Position Sensor ”A” Circuit
(Bank 2)
DTC
P0346
Camshaft Position Sensor ”A” Circuit
Range/Performance (Bank 2)
CIRCUIT DESCRIPTION
The camshaft position sensor consists of a magnet, an iron core and a pick–up coil. This sensor monitors
a timing rotor located on the camshaft and is used by the ECM to detect the camshaft angle. The camshaft
rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the cam-
shaft timing rotor as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time
and ignition timing.
If there is no signal from the camshaft position sensor even though the engine is turning or the rotation of
the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction in the sensor
and sets a DTC.
DTC No.
DTC Detection Condition
Trouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
P0340
P0345
No camshaft position sensor signal to ECM with engine
speed 600 rpm or more (1 trip detection logic)
Open or short in camshaft position sensor circuit
VVT sensor
P0341
P0346
While crankshaft rotates twice, camshaft position sensor
signal will be input to ECM 12 times or more (1 trip detec-
tion logic)
Hint:
Under normal condition, the camshaft position signal is
input into the ECM 3 times per 2 engine revolutions
VVT sensor
Camshaft
Jumping teeth of timing belt
ECM
DICEZ–02
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A23538
20 msec./DIV (idling)
2 V/DIV
Ground
VV1
VV2
NE
VV1, VV2 and NE Signal Waveforms
Ground
Ground
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DIAGNOSTICS
ENGINE
DI–217
411
Reference: Inspection using the oscilloscope.
The correct waveform is as shown.
Tester Connection
Specified Condition
G2+ (E5–27) – G2– (E5–32)
C
t
f
i
h
NE+ (E5–25) – NE– (E5–24)
Correct waveform is as shown
MONITOR DESCRIPTION
If there are no signals from the camshaft position sensor even though the engine is turning, or if the rotation
of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sen-
sor.
MONITOR STRATEGY
P0340
VVT sensor (Bank 1) range check or rationality
R l t d DTC
P0341
VVT sensor (Bank 1) range check or rationality
Related DTCs
P0345
VVT sensor (Bank 2) range check or rationality
P0346
VVT sensor (Bank 2) range check or rationality
R
i d
/
t
Main sensors/components
VVT sensor
Required sensors/components
Related sensors/components
Crankshaft position sensor, Engine speed sensor
Frequency of operation
Continuous
Duration
5 sec.
MIL operation
P0340, P0345 case 1: 2 driving cycles
P0340, P0345 case 2, P0341, P0346: Immediate
Sequence of operation
None
TYPICAL ENABLING CONDITIONS
It
Specification
Item
Minimum
Maximum
The monitor will run whenever these
DTCs are not present
See page
P0340, P0345 Case 1:
Starter
ON
Minimum battery voltage while starter ON
–
11 V
P0340, P0345 Case 2:
Engine RPM
600 rpm
–
Starter
OFF
Battery voltage
8 V
–
Ignition switch
ON
P0341, P0346:
Starter
After OFF to ON timing
Engine revolution
720
CA
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DI–218
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DIAGNOSTICS
ENGINE
412
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Threshold
P0340, P0345 Case 1:
VVT sensor signal
No signal
P0340, P0345 Case 2:
VVT sensor signal
No signal
P0341, P0346:
VVT sensor count
12 or more / 720
CA (= Engine 2 revolutions)
COMPONENT OPERATING RANGE
Parameter
Standard Value
VVT sensor signal input during every 720
CA
3
WIRING DIAGRAM
Refer to DTC P0335 on page
.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using
the hand−held tester
. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.
1
Check resistance of camshaft position sensor (See page
).
NG
Repair or replace harness or connector.
OK
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