Toyota Yaris: Sfi System / Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (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

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

SAE: P0340

*: When the engine is being stopped or started automatically by stop and start system control, the ECM does not monitor the camshaft position sensor signal.

  • Reference: Inspection using an oscilloscope.

    Click here

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

Required Sensors/Components (Main)

Camshaft position sensor

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Start the engine [A].
  7. Idle the engine for 10 seconds or more [B].
  8. Turn the GTS on.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  10. 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.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P034031.
  13. Check the DTC judgment result.

    GTS 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.

WIRING DIAGRAM

Refer to DTC P034011.

Click here

CAUTION / NOTICE / HINT

HINT:

  • Read Freeze Frame Data using the GTS. 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.
  • If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR

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 ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

D90-3(VC) - Body ground

Ignition switch ON

4.5 to 5.5 V

D90-1(VVI+) - Body ground

Ignition switch ON

3.0 to 5.5 V

*a

Front view of wire harness connector

(to Camshaft Position Sensor (for Intake Camshaft))

(d) Turn the ignition 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

D90-3(VC) - D90-1(VVI+)

Ignition switch off

1.425 to 1.575 kΩ

D90-2(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

D90-1(VVI+) - D104-90(VV1+)

Always

Below 1 Ω

D90-2(VVI-) - D104-89(VV1-)

Always

Below 1 Ω

D90-3(VC) - D104-88(VCV1)

Always

Below 1 Ω

D90-1(VVI+) or D104-90(VV1+) - Body ground and other terminals

Always

10 kΩ or higher

D90-2(VVI-) or D104-89(VV1-) - Body ground and other terminals

Always

10 kΩ or higher

D90-3(VC) or D104-88(VCV1) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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