DTC P0340 Camshaft Position Sensor Circuit Malfunction |
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) |
for Preparation Click here
DESCRIPTION
The intake camshaft's Variable Valve Timing (VVT) sensor (G signal) consists of a magnet and MRE (Magnet 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 |
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P0342 P0347 | Output voltage of VVT sensor 0.3 V or less is for 5 seconds (1 trip detection logic) |
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P0343 P0348 | Output voltage of VVT sensor 4.7 V or more is for 5 seconds (1 trip detection logic) |
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Reference: Inspection using an oscilloscope- HINT:
- The correct waveform is as shown.
- VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
Item Content Terminals NE+ - NE-
VV1+ - VV1-
VV2+ - VV2-Equipment Settings 5 V/DIV.
20 ms./DIV.Conditions Cranking or idling
WIRING DIAGRAM
Refer to DTC P0335 (Click here).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 (Click here).
1.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) |
Disconnect the C41 or C45 VVT sensor connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Specified Condition VC (C41-3) - Body ground 4.5 to 5.0 V VC (C45-3) - Body ground 4.5 to 5.0 V
Reconnect the VVT sensor connector.
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OK | |
2.CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM) |
Disconnect the C41 or C45 VVT sensor connector.
Disconnect the C58 (RHD) or C55 (LHD) ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance (Check for open):
- RHD:
Tester Connection Specified Condition VVR+ (C41-1) - VV1+ (C58-69) Below 1 Ω VVR- (C41-2) - VV1- (C58-92) Below 1 Ω VVL+ (C45-1) - VV2+ (C58-67) Below 1 Ω VVL- (C45-2) - VV2- (C58-90) Below 1 Ω - LHD:
Tester Connection Specified Condition VVR+ (C41-1) - VV1+ (C55-69) Below 1 Ω VVR- (C41-2) - VV1- (C55-92) Below 1 Ω VVL+ (C45-1) - VV2+ (C55-67) Below 1 Ω VVL- (C45-2) - VV2- (C55-90) Below 1 Ω
- Standard resistance (Check for short):
- RHD:
Tester Connection Specified Condition VVR+ (C41-1) or VV1+ (C58-69) - Body ground 10 kΩ or higher VVR- (C41-2) or VV1- (C58-92) - Body ground 10 kΩ or higher VVL+ (C45-1) or VV2+ (C58-67) - Body ground 10 kΩ or higher VVL- (C45-2) or VV2- (C58-90) - Body ground 10 kΩ or higher - LHD:
Tester Connection Specified Condition VVR+ (C41-1) or VV1+ (C55-69) - Body ground 10 kΩ or higher VVR- (C41-2) or VV1- (C55-92) - Body ground 10 kΩ or higher VVL+ (C45-1) or VV2+ (C55-67) - Body ground 10 kΩ or higher VVL- (C45-2) or VV2- (C55-90) - Body ground 10 kΩ or higher
Reconnect the VVT sensor connector.
Reconnect the ECM connector.
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OK | |
3.CHECK VVT SENSOR INSTALLATION (SENSOR INSTALLATION) |
Check the CKP sensor installation condition.
- OK:
- Sensor is installed correctly.
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OK | |
4.CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE) |
Check the teeth of the signal plate.
- OK:
- Sensor plate teeth do not have any cracks or deformation.
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OK | |
5.REPLACE VVT SENSOR |
Replace the VVT sensor (Click here).
NEXT | |
6.CHECK WHETHER DTC OUTPUT RECURS |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the intelligent tester on.
Clear the DTCs (Click here).
Select the following menu items: Powertrain / Engine / DTC.
Read the DTCs.
- Result:
Display (DTC Output) Proceed to No output A P0340, P0342, P0343, P0345, P0347 or P0348 B
- HINT:
- If the engine does not start, replace the ECM.
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A | ||
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