Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground (P034011,P034015,P034031,P034511,P034515,P034531)
DESCRIPTION
The VVT sensor (for intake camshaft) (VV1, VV2 signal) consists of a magnet and MRE (Magneto Resistance Element).
The intake camshaft has a timing rotor for the VVT sensor. When the intake camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM. Then the ECM uses this data to control fuel injection duration, injection timing and the Variable Valve Timing (VVT) system..
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P034011 | Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground | The VVT sensor (for intake camshaft of bank 1) output voltage is less than 0.3 V for 4 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0342 |
| P034015 | Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Battery or Open | The VVT sensor (for intake camshaft of bank 1) output voltage is higher than 4.7 V for 4 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0343 |
| P034031 | Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal | A missing VVT sensor (for intake camshaft of bank 1) signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0340 |
| P034511 | Camshaft Position Sensor "A" Bank 2 Circuit Short to Ground | The VVT sensor (for intake camshaft of bank 2) output voltage is less than 0.3 V for 4 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0347 |
| P034515 | Camshaft Position Sensor "A" Bank 2 Circuit Short to Battery or Open | The VVT sensor (for intake camshaft of bank 2) output voltage is higher than 4.7 V for 4 seconds or more (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0348 |
| P034531 | Camshaft Position Sensor "A" Bank 2 No Signal | A missing VVT sensor (for intake camshaft of bank 2) signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0345 |
-
Reference: Inspection using an oscilloscope.
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HINT:
- The correct waveform is as shown.
- VV1 stands for the VVT sensor (for intake camshaft of bank 1) signal, and VV2 stands for the VVT sensor (for intake camshaft of bank 2) signal.
ECM Terminal Name
CH1: Between VV1+ and VV1-
CH2: Between VV2+ and VV2-
Tester Range
5 V/DIV., 20 ms./DIV.
Condition
Idling
MONITOR DESCRIPTION
If no pulse signal is transmitted by the VVT sensor (for intake camshaft) despite the camshaft rotating, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.
Also, when the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V for 4 seconds or more, the ECM stores a DTC.
MONITOR STRATEGY
| Related DTCs | P0340: VVT sensor (bank 1) verify pulse input P0342: VVT sensor (bank 1) range check (low voltage) P0343: VVT sensor (bank 1) range check (high voltage) P0345: VVT sensor (bank 2) verify pulse input P0347: VVT sensor (bank 2) range check (low voltage) P0348: VVT sensor (bank 2) range check (high voltage) |
| Required Sensors/Components (Main) | VVT sensor (for intake camshaft) |
| Required Sensors/Components (Related) | Crankshaft position sensor |
| Frequency of Operation | Continuous |
| Duration | 5 seconds: P0340, P0345 4 seconds: P0342, P0343, P0347, P0348 |
| MIL Operation | Immediate |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All| Monitor runs whenever the following DTCs are not stored | None |
| All of the following conditions are met | - |
| Engine speed | 600 rpm or higher |
| Starter | Off |
| VVT sensor voltage | 0.3 to 4.7 V |
| VVT sensor range check fail (P0342, P0343) | Not detected |
| All of the following conditions are met | - |
| Starter | Off |
| Engine switch | On (IG) |
| Time after engine switch off to on (IG) | 2 seconds or more |
| Battery voltage | 8 V or higher |
| VVT sensor verify pulse input fail (P0340) | Not detected |
| All of the following conditions are met | - |
| Engine speed | 600 rpm or higher |
| Starter | Off |
| VVT sensor voltage | 0.3 to 4.7 V |
| VVT sensor range check fail (P0347, P0348) | Not detected |
| All of the following conditions are met | - |
| Starter | Off |
| Engine switch | On (IG) |
| Time after engine switch off to on (IG) | 2 seconds or more |
| Battery voltage | 8 V or higher |
| VVT sensor verify pulse input fail (P0345) | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0340 and P0345: VVT Sensor Verify Pulse Input| VVT sensor signal | No signal |
| VVT sensor voltage | Less than 0.3 V |
| VVT sensor voltage | Higher than 4.7 V |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for at least 30 seconds.
- Start the engine [A].
- Turn the Techstream on.
- Idle the engine for 10 seconds or more [B].
- Enter the following menus: Powertrain / Engine / Trouble Codes [C].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P034011, P034015, P034031, P034511, P034515 or P034531.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
- DTC judgment completed
- System normal
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system is malfunctioning.
-
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
- If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
-
Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
- Bank 2 refers to the bank that does not include the No. 1 cylinder.
- 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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
| 1. | CHECK TERMINAL VOLTAGE (POWER SOURCE OF VVT SENSOR (FOR INTAKE CAMSHAFT)) |
| *a | Front view of wire harness connector (to VVT Sensor (for Intake Camshaft)) |
| *b | Bank 1 |
| *c | Bank 2 |
(a) Disconnect the VVT sensor (for intake camshaft) connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| D29-3 (VC) - Body ground | Engine switch on (IG) | 4.5 to 5.5 V |
| D31-3 (VC) - Body ground | Engine switch on (IG) | 4.5 to 5.5 V |
| NG | .gif) | GO TO STEP 10 |
|
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| 2. | CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM) |
(a) Disconnect the VVT sensor (for intake camshaft) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| D29-1 (VVR+) - D2-132 (VV1+) | Always | Below 1 Ω |
| D29-2 (VVR-) - D2-100 (VV1-) | Always | Below 1 Ω |
| D31-1 (VVL+) - D2-129 (VV2+) | Always | Below 1 Ω |
| D31-2 (VVL-) - D2-97 (VV2-) | Always | Below 1 Ω |
| D29-1 (VVR+) or D2-132 (VV1+) - Body ground and other terminals | Always | 10 kΩ or higher |
| D29-2 (VVR-) or D2-100 (VV1-) - Body ground and other terminals | Always | 10 kΩ or higher |
| D31-1 (VVL+) or D2-129 (VV2+) - Body ground and other terminals | Always | 10 kΩ or higher |
| D31-2 (VVL-) or D2-97 (VV2-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK SENSOR INSTALLATION (VVT SENSOR (FOR INTAKE CAMSHAFT)) |
| *a | Clearance |
(a) Check the VVT sensor (for intake camshaft) installation condition.
OK:
VVT sensor is installed correctly.
| NG | | SECURELY REINSTALL VVT SENSOR |
|
| 4. | INSPECT INTAKE CAMSHAFT (TIMING ROTOR) |
(a) Check the timing rotor of the intake camshaft.
OK:
Camshaft timing rotor does not have any cracks or deformation.
HINT:
Perform "Inspection After Repair" after replacing the intake camshaft.
Click here
| NG | | REPLACE INTAKE CAMSHAFT |
|
| 5. | CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) |
(a) Remove the cylinder head cover sub-assembly and cylinder head cover sub-assembly LH.
| *a | Timing Mark | *b | TDC Timing Mark |
| *c | Groove | - | - |
(b) Turn the crankshaft pulley and align its groove with the TDC timing mark of the timing chain cover.
(c) Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assemblies are aligned with the timing marks of the bearing cap as shown in the illustration.
HINT:
If the timing marks are not as shown, turn the crankshaft one revolution clockwise.
OK:
Timing marks on camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned as shown in the illustration.
HINT:
If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.
| NG | | GO TO STEP 8 |
|
| 6. | REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT) |
(a) Replace the VVT sensor (for intake camshaft).
Click here
|
| 7. | CHECK WHETHER DTC OUTPUT RECURS (DTC P034011, P034015, P034031, P034511, P034515 OR P034531) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Start the engine.
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P034011, P034015, P034031, P034511, P034515 or P034531 is output | B |
HINT:
If the engine does not start, replace the ECM.
| A | | END |
| B | | REPLACE ECM |
| 8. | CHECK ENGINE MECHANICAL SYSTEM |
(a) Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.
| NG | | REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA |
|
| 9. | CHECK WHETHER DTC OUTPUT RECURS (DTC P034011, P034015, P034031, P034511, P034515 OR P034531) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Start the engine.
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read the DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P034011, P034015, P034031, P034511, P034515 or P034531 is output | B |
| A | | CHECK FOR INTERMITTENT PROBLEMS |
| B | | REPLACE ECM |
| 10. | CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM) |
(a) Disconnect the VVT sensor (for intake camshaft) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| D29-3 (VC) - D2-99 (VCV1) | Always | Below 1 Ω |
| D31-3 (VC) - D2-98 (VCV2) | Always | Below 1 Ω |
| D29-3 (VC) or D2-99 (VCV1) - Body ground and other terminals | Always | 10 kΩ or higher |
| D31-3 (VC) or D2-98 (VCV2) - Body ground and other terminals | Always | 10 kΩ or higher |
| OK | | REPLACE ECM |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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