Dtc P0340 Camshaft Position Sensor Circuit Malfunction
Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)
CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM)
CHECK VVT SENSOR FOR INTAKE CAMSHAFT (SENSOR INSTALLATION)
CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)
REPLACE VVT SENSOR
CHECK WHETHER DTC OUTPUT RECURS
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 (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
| - Input voltage to ECM remains 0.3 V or less, or 4.7 V or higher for more than 5 seconds, when 2 or more seconds have elapsed after turning ignition switch to the ON position
(1 trip detection logic)
- No VVT sensor signal to ECM during cranking
(1 trip detection logic)
| - Open or short in VVT sensor for intake camshaft circuit
- VVT sensor for intake camshaft
- Camshaft timing gear for intake camshaft
- Jumped tooth of timing chain for intake camshaft
- ECM
|
P0342
P0347
| Output voltage of VVT sensor is 0.3 V or less for 5 seconds
(1 trip detection logic)
| - Open or short in VVT sensor for intake camshaft circuit
- VVT sensor for intake camshaft
- Camshaft timing gear for intake camshaft
- Jumped tooth of timing chain for intake camshaft
- ECM
|
P0343
P0348
| Output voltage of VVT sensor is 4.7 V or more for 5 seconds
(1 trip detection logic)
| - Open or short in VVT sensor for intake camshaft circuit
- VVT sensor for intake camshaft
- Camshaft timing gear for intake camshaft
- Jumped tooth of timing chain for intake camshaft
- ECM
|
- 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
|
Terminal
| NE+ - NE-
VV1+ - VV1-
VV2+ - VV2-
|
Equipment Setting
| 5 V/DIV.
20 ms./DIV.
|
Condition
| Cranking or idling
|
WIRING DIAGRAM
Refer to DTC P0335 (RAV4_ACA30 RM000000TCW0AEX_07.html).
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 (RAV4_ACA30 RM000000PDS09FX.html).
| 1.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) |
Disconnect the intake camshaft VVT sensor connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Specified Condition
|
VC (3) - Body ground
| 4.5 to 5.0 V
|
Reconnect the VVT sensor connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM) |
Disconnect the intake camshaft VVT sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance (Check for open):
- Bank 1:
Tester Connection
| Specified Condition
|
VVR+ (B93-1) - VV1+ (B96-69)
| Below 1 Ω
|
VVR- (B93-2) - VV1- (B96-92)
| Below 1 Ω
|
- Bank 2:
Tester Connection
| Specified Condition
|
VVL+ (B79-1) - VV2+ (B96-67)
| Below 1 Ω
|
VVL- (B79-2) - VV2- (B96-90)
| Below 1 Ω
|
- Standard resistance (Check for short):
- Bank 1:
Tester Connection
| Specified Condition
|
VVR+ (B93-1) or VV1+ (B96-69) - Body ground
| 10 kΩ or higher
|
VVR- (B93-2) or VV1- (B96-92) - Body ground
| 10 kΩ or higher
|
- Bank 2:
Tester Connection
| Specified Condition
|
VVL+ (B79-1) or VV2+ (B96-67) - Body ground
| 10 kΩ or higher
|
VVL- (B79-2) or VV2- (B96-90) - Body ground
| 10 kΩ or higher
|
Reconnect the VVT sensor connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK VVT SENSOR FOR INTAKE CAMSHAFT (SENSOR INSTALLATION) |
Check the VVT sensor installation condition.
- OK:
- Sensor is installed correctly.
| | REPAIR OR REPLACE VVT SENSOR |
|
|
| 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.
| | REPLACE CAMSHAFT TIMING GEAR ASSEMBLY |
|
|
| 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 (RAV4_ACA30 RM000000PDK0WDX.html).
Select the following menu items: Powertrain / Engine and ECT / 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.
