Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031)

DESCRIPTION

Refer to DTC P034011.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P034031

Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal

No camshaft position sensor (for intake camshaft) signal for 5 seconds at an engine speed of 600 rpm or higher (1 trip detection logic).

  • Open or short in camshaft position sensor (for intake camshaft) circuit
  • Camshaft position sensor (for intake camshaft)
  • Intake camshaft
  • ECM

Comes on

DTC stored

SAE Code: P0340

Reference: Inspection using an oscilloscope.

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MONITOR DESCRIPTION

If no pulse signal is transmitted by the camshaft position sensor (for intake camshaft) despite the camshaft rotating, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY

Related DTCs

P0340: Camshaft position sensor verify pulse input

Required Sensors/Components (Main)

Camshaft position sensor (for intake camshaft)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All of the following conditions are met

-

Auxiliary battery voltage

8 V or higher

Power switch

On (IG)

Camshaft position sensor voltage

0.3 to 4.7 V

Engine speed

600 rpm or higher

Camshaft position sensor range check fail (P0342, P0343)

Not detected

Hybrid control module judge

Engine running

Lost communication with hybrid vehicle control ECU assembly (U0293)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

Camshaft position sensor signal

No signal

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

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

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  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  9. Start the engine [A].
  10. Idle the engine for 10 seconds or more [B].
  11. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  12. 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.
  13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  14. Input the DTC: P034031.
  15. 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.
    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
    • [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 auxiliary 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

Refer to DTC P034011.

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CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

  • If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
  • 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 HARNESS AND CONNECTOR

*a

Front view of wire harness connector

(to Camshaft Position Sensor (for Intake Camshaft))

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the camshaft position sensor (for intake camshaft) connector.

(b) Turn the power switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

C12-3 (VC) - Body ground

Power switch on (IG)

4.5 to 5.5 V

C12-1 (VVI+) - Body ground

Power switch on (IG)

3.0 to 5.0 V

(d) Turn the power switch off and wait for at least 30 seconds.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C12-3 (VC) - C12-1 (VVI+)

Power switch off

1.425 to 1.575 kΩ

C12-2 (VVI-) - Body ground

Always

Below 1 Ω

NG

GO TO STEP 4

OK

2.

CHECK SENSOR INSTALLATION AND CONDUCT VISUAL INSPECTION (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))

*a

Clearance

(a) Visually check the camshaft position sensor (for intake camshaft) for damage.

(b) Check the camshaft position sensor (for intake camshaft) installation condition.

OK:

The camshaft position sensor (for intake camshaft) does not have any damage and is installed properly.

NG

SECURELY REINSTALL CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

OK

3.

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

OK

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

NG

REPLACE INTAKE CAMSHAFT

4.

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) - ECM)

(a) Disconnect the camshaft position 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

C12-1 (VVI+) - C55-90 (VV1+)

Always

Below 1 Ω

C12-2 (VVI-) - C55-89 (VV1-)

Always

Below 1 Ω

C12-3 (VC) - C55-88 (VCV1)

Always

Below 1 Ω

C12-1 (VVI+) or C55-90 (VV1+) - Body ground and other terminals

Always

10 kΩ or higher

C12-2 (VVI-) or C55-89 (VV1-) - Body ground and other terminals

Always

10 kΩ or higher

C12-3 (VC) or C55-88 (VCV1) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground (P034011,P034015)

    Camshaft Position Sensor "B" Bank 1 Circuit Short to Ground (P036511,P036515)

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