Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001BGX1
Model Year Start: 2019 Model: Corolla Hatchback Prod Date Range: [06/2018 - 03/2019]
Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P034011; Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground; 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]

DTC

P034011

Camshaft Position Sensor "A" Bank 1 or Single Sensor Circuit Short to Ground

DESCRIPTION

The camshaft position sensor (for intake camshaft) (VV1 signal) consists of a magnet and MRE (Magneto Resistance Element).

The intake camshaft has a timing rotor for the camshaft position 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 camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals. The ECM uses the pulse signals to determine the camshaft angle. Then the ECM uses this data to control fuel injection duration and injection timing.

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

Diagnosis condition:

  • 2 seconds or more have elapsed after the engine switch is turned on (IG).

Abnormal condition:

  • The camshaft position sensor (for intake camshaft) output voltage is less than 0.3 V.

Malfunction time:

  • 4 seconds or more

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection (Main):

  • Camshaft position sensor (for intake camshaft)

Sensors/components used for detection (Related):

  • Crankshaft position sensor
  • Short in camshaft position sensor (for intake camshaft) circuit
  • Camshaft position sensor (for intake camshaft)
  • ECM

Comes on

DTC stored

SAE Code: P0342
  • Reference: Inspection using an oscilloscope.

    HINT:

    • The correct waveform is as shown.
    • VV1 stands for the camshaft position sensor signal (for intake camshaft), and EV1 stands for the camshaft position sensor signal (for exhaust camshaft).

    ECM Terminal Name

    CH1: Between VV1+ and VV1-

    CH2: Between EV1+ and EV1-

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine

MONITOR DESCRIPTION

2 seconds or more after the engine switch has been turned on (IG), if the output voltage of the camshaft position sensor (for intake camshaft) is less than 0.3 V for 4 seconds or more, the ECM determines that the camshaft position sensor (for intake camshaft) circuit is malfunctioning and illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P0342: Camshaft position sensor range check (low voltage)

Required Sensors/Components (Main)

Camshaft position sensor (for intake camshaft)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

4 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

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

Camshaft position sensor verify pulse input fail (P0340)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

Camshaft position sensor voltage

Less than 0.3 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 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the engine 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 engine switch off and wait for at least 30 seconds.
  6. Turn the engine switch on (IG) [A].
  7. Turn the Techstream on.
  8. Wait for 5 seconds or more [B].
  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. Proceed to the next screen and enter the DTC to be checked.
  13. 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:

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.

CLEAR DTC

(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.

NEXT

2.

CHECK DTC OUTPUT (DTC P034011 OR P034015)

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) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(c) Enter the following menus: Powertrain / Engine / Trouble Codes.

(d) Read the DTCs.

Powertrain > Engine > Trouble Codes

HINT:

When the ECM, wire harnesses and connectors are normal, DTC P034015 will be stored when the connector of the sensor is disconnected.

Result

Proceed to

DTC P034015 is output

A

DTC P034011 is output

B
A

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

B

3.

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

C9-1 (VVI+) or C76-90 (VV1+) - Body ground and other terminals

Always

10 kΩ or higher

C9-2 (VVI-) or C76-89 (VV1-) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR