P0345
3UR-FE ENGINE CONTROL: SFI SYSTEM: P0340: Camshaft Position Sensor Circuit Malfunction
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)
DESCRIPTION
The intake camshaft's Variable Valve Timing (VVT) sensor (VV1, 2 signal) consists of a magnet and MRE (Magnetic Resistance Element).
The intake camshaft has a sensor plate with 3 teeth on its outer circumference. When the intake camshaft rotates, changes occur in the air gaps between the 3 teeth and MRE, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the gear rotation data into pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.
- Reference: Inspection using an oscilloscope
Standard:
HINT: VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
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
P0340, P0345 (Engine Running)
P0340, P0345 (Cranking)
P0340, P0342, P0343, P0345, P0347, P0348 (Chattering, Low Voltage, High Voltage)
TYPICAL MALFUNCTION THRESHOLDS
P0340 (Engine Running, Cranking)
P0340 (Chattering)
P0342 (Low Voltage)
P0343 (High Voltage)
P0345 (Engine Running, Cranking)
P0345 (Chattering)
P0347 (Low Voltage)
P0348 (High Voltage)
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. 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 DTC Check / Clear.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)
(a) Disconnect the VVT sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM)
(a) Disconnect the VVT sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE CAMSHAFT)
(a) Check the CKP sensor installation.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
4. INSPECT INTAKE CAMSHAFT (TEETH)
(a) Check the teeth of the camshaft.
OK:
Teeth do not have any cracks or deformation.
NG -- REPLACE INTAKE CAMSHAFT
OK -- Continue to next step.
5. REPLACE VVT SENSOR
(a) Replace the VVT sensor Removal.
NEXT -- Continue to next step.
6. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
(g) Read DTCs.
Result
HINT: If the engine does not start, replace the ECM.
B -- REPLACE ECM
A -- END