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DI-209
DIAGNOSTICS - ENGINE (1GR-FE)
DIDTM-01
DTC P0340 Camshaft Position Sensor "A" Circuit
(Bank 1 or Single Sensor)
DTC P0342 Camshaft Position Sensor "A" Circuit Low
Input (Bank 1 or Single Sensor)
DTC P0343 Camshaft Position Sensor "A" Circuit High
Input (Bank 1 or Single Sensor)
DTC P0345 Camshaft Position Sensor "A" Circuit
(Bank 2)
DTC P0347 Camshaft Position Sensor "A" Circuit Low
Input (Bank 2)
DTC P0348 Camshaft Position Sensor "A" Circuit High
Input (Bank 2)
CIRCUIT 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.
DTC No. DTC Detection Condition Trouble Area
S Open or short in camshaft position sensor circuit
No camshaft position sensor signal to ECM during cranking S Camshaft position sensor
P0340
for 4 seconds or more. S Camshaft timing pulley
P0345
(2 trip detection logic) S Jumping teeth of timing belt
S ECM
S Open or short in camshaft position sensor circuit
No camshaft position sensor signal to ECM at engine S Camshaft position sensor
P0340
speed 600 rpm or more for 5 seconds or more. S Camshaft timing pulley
P0345
(1 trip detection logic) S Jumping teeth of timing belt
S ECM
DI-210
DIAGNOSTICS - ENGINE (1GR-FE)
S Open or short in camshaft position sensor circuit
Input voltage to ECM remains 0.3 V or less, or 4.7 V or
S Camshaft position sensor
P0340 higher for more than 5 seconds, when 2 or more seconds
S Camshaft timing pulley
P0345 have elapsed after turning the ignition switch ON.
S Jumping teeth of timing belt
(1 trip detection logic)
S ECM
S Open or short in camshaft position sensor circuit
Input voltage to ECM remains 0.3 V or less for more than 5
S Camshaft position sensor
P0342 seconds, when 2 or more seconds have elapsed after turn-
S Camshaft timing pulley
P0347 ing the ignition switch ON.
S Jumping teeth of timing belt
(1 trip detection logic)
S ECM
S Open or short in camshaft position sensor circuit
Input voltage to ECM remains 4.7 V or higher for more than
S Camshaft position sensor
P0343 5 seconds, when 2 or more seconds have elapsed after
S Camshaft timing pulley
P0348 turning the ignition switch ON.
S Jumping teeth of timing belt
(1 trip detection logic)
S ECM
Inspection using the oscilloscope.
5 V/DIV
The correct waveform is as shown in the illustration.
NE GND Tester Connection Specified Condition
VV1+ (E5-25) - VV1- (E5-24) Correct waveform is as shown
VV1 VV2+ (E5-18) - VV2- (E5-28) Correct waveform is as shown
GND
NE+ (E5-21) - NE- (E5-20) Correct waveform is as shown
VV2
GND
20 ms/DIV A23539
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.
DI-211
DIAGNOSTICS - ENGINE (1GR-FE)
MONITOR STRATEGY
Camshaft position sensor range check
Camshaft position/crankshaft position misalign-
P0340 ment
Camshaft position sensor range check (Fluctuat-
ing)
Camshaft position sensor range check (Low volt-
P0342
age)
Related DTCs Camshaft position sensor range check (High volt-
P0343
age)
VVT sensor range check (While starting engine)
P0345 VVT sensor range check (After starting engine)
VVT sensor range check (Fluctuating)
P0347 VVT sensor range check (Low voltage)
P0348 VVT sensor range check (High voltage)
Main sensors/components VVT sensor, Camshaft position sensor
Required sensors/components
R i d / t
Related sensors/components Crankshaft position sensor, Engine speed sensor
Frequency of operation Continuous
4 sec.:
P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting
Duration engine))
5 sec.:
Others
2 driving cycles:
P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting
MIL operation engine))
Immediate:
Others
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-18
DTCs are not present
Camshaft position sensor range check:
Starter ON and not starter ON again
Minimum battery voltage while starter ON - 11 V
Camshaft position/crankshaft position misalignment:
Engine RPM 600 rpm -
Starter OFF
Camshaft position sensor range check (Fluctuating, Low voltage, High voltage):
Starter OFF
Ignition switch ON and time after ignition
2 sec. -
switch is OFF to ON
VVT sensor range check (While starting engine):
Starter ON
Battery voltage while starter ON once at
- 11 V
least
DI-212
DIAGNOSTICS - ENGINE (1GR-FE)
VVT sensor range check (After starting engine):
Engine RPM 600 rpm -
Battery voltage 8V -
Ignition switch ON
Starter OFF
VVT sensor range check (Fluctuating, Low voltage, High voltage):
Starter OFF
Ignition switch ON and time after ignition
2 sec. -
switch is OFF to ON
Battery voltage 8V -
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria Threshold
Camshaft position sensor range check:
Camshaft position sensor signal No signal
Camshaft position/crankshaft position misalignment:
Camshaft position and crankshaft position phase Mis-aligned
Camshaft position sensor range check (Fluctuating):
Camshaft position sensor voltage Less than 0.3 V, or more than 4.7 V
Camshaft position sensor range check (Low voltage):
Camshaft position sensor voltage Less than 0.3 V
Camshaft position sensor range check (High voltage):
Camshaft position sensor voltage More than 4.7 V
VVT sensor range check (While starting engine):
VVT sensor signal No signal
VVT sensor range check (After starting engine):
VVT sensor signal No signal
VVT sensor range check (Fluctuating):
VVT sensor voltage Less than 0.3 V, or more than 4.7 V
VVT sensor range check (Low voltage):
VVT sensor voltage Less than 0.3 V
VVT sensor range check (High voltage):
VVT sensor voltage More than 4.7 V
WIRING DIAGRAM
Refer to DTC P0335 on page DI-203.
DI-213
DIAGNOSTICS - ENGINE (1GR-FE)
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 camshaft position sensor power source.
PREPARATION:
Wire Harness Side
Disconnect the camshaft position sensor connector.
CHECK:
V16
Measure the voltage between terminal 3 of the camshaft posi-
V17 tion sensor wire harness side connector and body ground.
1 2 3
OK:
Standard:
4.5 to 5.5 V
Camshaft Position Sensor A23447
NG Check and repair harness and connector.
OK
2 Check signal of camshaft position sensor.
5 V/DIV
PREPARATION:
Start the engine.
CHECK:
NE GND
Using oscilloscope, measure the signal waveform between ter-
minal 3 of the camshaft position sensor and body ground.
VV1
GND OK:
VV2 Standard:
GND
Tester Connection Specified Condition
20 ms/DIV A23539
VV1+ (E5-19) - VV1- (E5-29) Correct waveform is as shown
VV2+ (E5-18) - VV2- (E5-28) Correct waveform is as shown
NE+ (E5-21) - NE- (E5-20) Correct waveform is as shown
OK Replace ECM (See page SF-66).
NG
DI-214
DIAGNOSTICS - ENGINE (1GR-FE)
3 Check for open and short in harness and connector between ECM and camshaft
position sensor.
PREPARATION:
Wire Harness Side
(a) Disconnect the camshaft position sensor connector.
(b) Disconnect the E5 ECM connector.
V16
CHECK:
V17 Measure the resistance between the wire harness side connec-
1 2 3
tors.
OK:
Standard:
Camshaft Position Sensor A23447 Tester Connection Specified Condition
Camshaft position sensor (V17-1) -
Below 1
VV1+ (E5-19)
E5
Camshaft position sensor (V17-2) -
Below 1
VV1- (E5-29)
Camshaft position sensor (V16-1) -
Below 1
VV2+ (E5-18)
VV1+ VV2+
Camshaft position sensor (V16-2) -
Below 1
VV2- (E5-28)
VV1- VV2- Camshaft position sensor (V17-1) or
10 k or higher
B17414 VV1+ (E5-19) - Body ground
Camshaft position sensor (V16-2) or
10 k or higher
VV1- (E5-29) - Body ground
Camshaft position sensor (V16-1) or
10 k or higher
VV2+ (E5-18) - Body ground
Camshaft position sensor (V16-2) or
10 k or higher
VV2- (E5-28) - Body ground
NG Repair or replace harness or connector.
OK
4 Check sensor installation (Camshaft position sensor).
CHECK:
Check the VVT position sensor installation.
OK:
The VVT sensor is installed properly.
Clearance
OK NG NG Tighten sensor installation bolt.
BR3795
OK
DI-215
DIAGNOSTICS - ENGINE (1GR-FE)
5 Inspect teeth of camshaft timing belt pulley.
PREPARATION:
Remove the camshaft timing belt pulley (See page EM-53).
CHECK:
Check the camshaft timing belt pulley.
NG Replace camshaft timing pulley.
OK
Replace Camshaft position sensor
(See page IG-11).
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