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DI-730
DIAGNOSTICS - ENGINE (2UZ-FE)
DIDRV-01
DTC P1340 Camshaft Position Sensor "A"
(Bank 1 Sensor 1)
DTC P1341 Camshaft Position Sensor "A"
(Bank 1 Sensor 1)
CIRCUIT DESCRIPTION
Camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.
The camshaft drive gear (LH) has 3 teeth on its inner circumference. When the camshaft gear rotates, air
gap changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field
and result in change in the resistance of the MRE element.
The crankshaft signal plate has 32 teeth and is mounted on the crankshaft. The crankshaft position sensor
generates 32 signals at every engine revolution. The ECM detects the standard crankshaft angle based on
the G signal and the actual crankshaft angle and the engine speed by the NE signal.
DTC No. DTC Detecting Condition Trouble Area
No camshaft position sensor signal to ECM during cranking S Open or short in camshaft position sensor circuit
P1340 (2 trip detection logic) S Camshaft position sensor
osition
P1341 No camshaft position sensor signal to ECM with engine speed S LH camshaft timing pulley
600 rpm or more S ECM
MONITOR DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet and MRE element.
The camshaft drive gear has 5 teeth on its inner circumference. When the camshaft gear rotates, air gap
changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field and
result in change in the resistance of the MRE element. The crankshaft angle sensor plate has 32 teeth and
output 32 signals every engine revolution. The ECM detects the standard crankshaft angle based on the
G signal and actual crankshaft angle and engine speed by NE signal.
MONITOR STRATEGY
Camshaft position sensor (Bank 1) range check
P1340
or rationality
Related DTCs
R l t d DTC
Camshaft position sensor (Bank 1) range check
P1341
or rationality
Main sensors/components Camshaft position sensor
Required sensors/components
R i d / t
Related sensors/components Crankshaft position sensor, Engine speed sensor
Frequency of operation Continuous
Duration 5 sec.
P1340 case 1 (no signal): 2 driving cycles
MIL operation
P1340 case 2 (mis-aligned), P1341: Immediate
Sequence of operation None
DI-731
DIAGNOSTICS - ENGINE (2UZ-FE)
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-437
DTCs are not present
P1340 Case 1 (No signal):
Starter ON
Minimum battery voltage while starter ON - 11 V
P1340 Case 2 (Mis-aligned):
Engine RPM 600 rpm -
Starter OFF
P1341:
Starter After OFF to ON timing
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria Threshold
P1340 Case 1 (No signal):
Camshaft position sensor signal No signal
P1340 Case 2 (Mis-aligned):
Crankshaft/camshaft alignment is mis-aligned (judged by comparing the crankshaft position to the camshaft position)
Camshaft position sensor signal: No input in appropriate timing.
P1341:
Crankshaft/Camshaft alignment Mis-aligned
Camshaft position sensor count 12 or more / 720_CA (= Engine 2 revolutions)
COMPONENT OPERATING RANGE
Parameter Standard Value
Camshaft position sensor signal input at every 720_CA 3
WIRING DIAGRAM
Refer to DTC P0335 on page DI-632.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using hand-held tester. Because freeze frame records the engine conditions when
the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was run-
ning or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the
malfunction.
DI-732
DIAGNOSTICS - ENGINE (2UZ-FE)
1 Check voltage of camshaft position sensor power source circuit.
Wire Harness Side: PREPARATION:
(a) Disconnect the Camshaft position sensor connector.
(b) Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminal 3 of the camshaft posi-
tion sensor connector and body ground.
OK:
Camshaft Position Sensor Standard: 4.5 to 5.5 V
B17445
NG Repair or replace harness or connector.
OK
2 Check camshaft position sensor signal.
PREPARATION:
2 V / DIV
Start the engine.
Crank Angle
CHECK:
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