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)
DESCRIPTION
The intake camshaft's Variable Valve Timing (VVT) sensor (G signal) consists of a magnet and MRE (Magneto Resistance Element).
The VVT camshaft drive gear has a sensor plate with 3 teeth on its outer circumference. When the gear rotates, changes occur in the air gaps between the sensor plate and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the gear rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.
The crankshaft angle sensor plate has 34 teeth. The pickup coil generates 34 signals for each engine revolution. Based on combination of the G signal and NE signal, the ECM detects the crankshaft angle.
Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the NE signal, the ECM detects the engine speed.
DTC No. |
DTC Detection Condition |
Trouble Area |
P0340 P0345 |
|
|
P0342 P0347 |
Output voltage of VVT sensor is 0.3 V or less for 5 seconds (1 trip detection logic) |
|
P0343 P0348 |
Output voltage of VVT sensor is 4.7 V or more for 5 seconds (1 trip detection logic) |
|
Reference: Inspection using an oscilloscope
HINT:
MONITOR DESCRIPTION
If no signal is transmitted by the VVT sensor despite the engine revolving, or the rotations of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Camshaft Position Sensor Range Check:
Camshaft Position/Crankshaft Position Misalignment:
Camshaft Position Sensor Range Check (Chattering, Low voltage, High voltage):
VVT sensor range check (While starting engine):
VVT sensor range check (After starting engine):
VVT sensor range check (Chattering, Low voltage, High voltage):
TYPICAL MALFUNCTION THRESHOLDS
Camshaft Position Sensor Range Check:
Camshaft Position/Crankshaft Position Misalignment:
Camshaft Position Sensor Range Check (Fluctuating):
Camshaft Position Sensor Range Check (Low voltage):
Camshaft Position Sensor Range Check (High voltage):
VVT sensor range check (While starting engine):
VVT sensor range check (After starting engine):
VVT sensor range check (Fluctuating):
VVT sensor range check (Low voltage):
VVT sensor range check (High voltage):
COMPONENT OPERATING RANGE
WIRING DIAGRAM
Refer to DTC P0335.
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1 CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)
Standard voltage
2 CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)
Standard resistance : Check for open
Check for short
3 CHECK SENSOR INSTALLATION (VVT SENSOR)
OK: Sensor is installed correctly.
4 CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)
OK: Sensor plate teeth do not have any cracks or deformation.
5 REPLACE VVT SENSOR
6 CHECK WHETHER DTC OUTPUT RECURS
Result
HINT: If the engine does not start, replace the ECM.
END
7 CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)
Standard resistance : Check for open
Check for short
REPLACE ECM
Disassembly
1. REMOVE 2ND BRAKE PISTON RETURN SPRING
SUB-ASSEMBLY
(a) Place SST on the return spring and compress the
return spring with a press.
SST 09387-00060
(b) Using a screwdriver, remove the snap ring.
(c) Remove the 2nd brake piston return spring.
2. REMOVE 2ND BRAKE PISTON
(a) Hold ...
Removal
1. REMOVE REAR DOOR SCUFF PLATE LH
2. REMOVE REAR DOOR WEATHERSTRIP LH
3. REMOVE BACK DOOR WEATHERSTRIP
4. REMOVE BACK DOOR SCUFF PLATE
5. REMOVE QUARTER TRIM FRONT PANEL ASSEMBLY LH
6. REMOVE POWER POINT SOCKET ASSEMBLY
Release the 2 claw fittings and remove the power
point soc ...
Precaution
1. INITIALIZATION
NOTICE:
Perform RESET MEMORY (AT initialization) when
replacing the automatic transaxle assembly, engine
assembly or ECM.
Perform REGISTRATION (VIN registration) when
replacing the ECM.
HINT:
Initialization cannot be completed by only removing the
batt ...